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Publications in 2024

  1. "Isolating an Inner-Sphere Adduct of [RuIV(=O)(terpy)(bpy)]2+ and [CeIV(OH)(NO3)5]2− with the Oxo Bonded to the CeIV Center"
    Yutaro Aimoto, Alexander Parent, Kosei Yamauchi, and Ken Sakai
    ChemRxiv, DOI: 10.26434/chemrxiv-2024-vlcxx.

  2. "Efficient Visible-Light-Driven Water Oxidation by a Carbon Nitride Modified with Cobalt Polyoxometalate Molecular Catalyst"
    Yuki Tomita, Natsuki Taira, Ken Sakai, and Hironobu Ozawa
    ACS Catal., 2024, 14, 5788-5794.

  3. "Synthesis of the MN Ring of Caribbean Ciguatoxin C-CTX-1 via Desymmetrization by Acetal Formatione"
    Masahiro Kaneko, Atsuhiro Yamashita, Yoko Yasuno, Kosei Yamauchi, Ken Sakai, and Tohru Oishi
    Org. Lett., 2024, 26, 855-859.

Publications in 2023

  1. "Highly Efficient and Stable Molecular-Based TiO2 Photoanode for Photoelectrochemical Water Splitting Achieved by Pyridyl Anchoring Technique"
    Xin Yan, Ken Sakai, and Hironobu Ozawa
    ACS Catal., 2023, 13, 13456-13465.

  2. "Precious-Metal-Free CO2 Photoreduction Boosted by Dynamic Coordinative Interaction between Pyridine-Tethered Cu(I) Sensitizers and a Co(II) Catalyst"
    Jia-Wei Wang, Xian Zhang, Lucia Velasco, Michael Karnahl, Zizi Li, Zhi-Mei Luo, Yanjun Huang, Jin Yu, Wenhui Hu, Xiaoyi Zhang, Kosei Yamauchi, Ken Sakai, Dooshaye Moonshiram, and Gangfeng Ouyang
    JACS Au, 2023, 3, 1984-1997.

  3. "Intracluster O-O Coupling Pathway Evidenced for an Anderson-type Single-Cobalt Polymolybdate Water Oxidation Catalyst"
    Natsuki Taira, Kosei Yamauchi, and Ken Sakai
    ACS Catal., 2023, <13, 3211-3223.

  4. "Efficient syngas production with controllable CO:H2 ratios based on the aqueous electrocatalytic CO2 reduction over mesoporous TiO2 films modified with a cobalt porphyrin molecular catalyst"
    Hironobu Ozawa, Ryoma Kikunaga, Hajime Suzuki, Ryu Abe, and Ken Sakai
    Sustainable Energy Fuels, published online.

  5. "Controlling the Photofunctionality of a Polyanionic Heteroleptic Copper(I) Photosensitizer for CO2 Reduction Using Its Ion-pair Formation with Polycationic Ammonium in Aqueous Media"
    Fumika Sueyoshi, Xian Zhang, Kosei Yamauchi, and Ken Sakai
    Angew. Chem. Int. Ed., 2023, 62, e202217807.

Publications in 2022

  1. "Theoretical Study on the Mechanism of Hydrogen Evolution Reaction Catalyzed by Platinum Subnanoclusters"
    Keita Kuge, Kosei Yamauchi and Ken Sakai
    Dalton Trans., 2023, 52, 583-597. (Selected as a Hot Article.) Open Access!
    ChemRxiv, posted on April 1, 2022.

  2. "Visible-Light-Driven Reduction of CO2 to CO in Fully Aqueous Media using a Water-Soluble Cobalt Porphyrin"
    Arnau Call, Mihaela Cibian, Kosei Yamauchi and Ken Sakai
    Sustainable Energy Fuels, 2022, 6, 2160-2164.

Publications in 2021

  1. "Two-Electrode Solar Water Splitting Permitting H2 Separation at a Dark Cathode"
    Hironobu Ozawa and Ken Sakai
    AsiaChem, 2021, 2, 80-87.

  2. "Catalysis of CO2 reduction by diazapyridinophane complexes of Fe, Co, and Ni: CO2 binding triggered by combined frontier MO associations involving a SOMO"
    Yuto Sakaguchi, Arnau Call, Kosei Yamauchi, and Ken Sakai
    Dalton Trans., 2021, 50, 15983-15995. (Selected as a Cover Picture and a Hot Article.)

  3. "Earth-Abundant Photocatalytic CO2 Reduction by Multielectron Chargeable Cobalt Porphyrin Catalysts: High CO/H2 Selectivity in Water Based on Phase Mismatch in Frontier MO Association"
    Xian Zhang, Kosei Yamauchi, and Ken Sakai
    ACS Catal., 2021, 11, 10436–10449. (Selected as a Supplementary Cover Picture.)

  4. "Redox tuning in Pt(bpy)-viologen catalyst-acceptor dyads enabling photocatalytic hydrogen evolution from water"
    Koichi Yatsuzuka, Kosei Yamauchi, and Ken Sakai
    Chem. Commun., 2021, 57, 5183-5186.

  5. "Improving the Overall Performance of Photochemical H2 Evolution Catalyzed by the Co-NHC Complex via the Redox Tuning of Electron Relays"
    Koichi Yatsuzuka, Kosei Yamauchi, Ken Kawano, Hironobu Ozawa, and Ken Sakai
    Sustainable Energy Fuels, 2021, 5, 740-749.

  6. "Unexpected structure of enaminone Pd(II) complex in comparison with Cu(II)complex: Synthesis, characterization, DNA binding and antitumor activity"
    Hoda A. El-Ghamry, Kosei Yamauchi, Ken Sakai, and Thoraya A. Farghaly
    Inorg. Chim. Acta, 2021, 516, 120117.

Publications in 2020

  1. "A Molecular-Based Water Electrolyzer Consisting of Two Mesoporous TiO2 Electrodes Modified with Metalloporphyrin Molecular Catalysts Showing a Quantitative Faradaic Efficiency"
    Katsuhiro Akamine, Kohei Morita, Ken Sakai, and Hironobu Ozawa
    ACS Appl. Energy Mater., 2020, 3, 4860–4866.

  2. "A dinuclear nickel catalyst based on metal–metal cooperation for electrochemical hydrogen production"
    Tomohiko Hamaguchi, Keisuke Kai, Isao Ando, Ken Kawano, Kosei Yamauchi, and Ken Sakai
    Inorg. Chim. Acta, 2020, 505, 119498-119503.

Publications in 2019

  1. "Photochemical CO2 Reduction Driven by Water-Soluble Copper(I) Photosensitizer with the Catalysis Accelerated by Multi-Electron Chargeable Cobalt Porphyrin"
    Xian Zhang, Mihaela Cibian, Arnau Call, Kosei Yamauchi, and Ken Sakai
    ACS Catal., 2019, 9, 11263-11273.

  2. "An Earth-abundant System for Light-driven CO2 Reduction to CO Using a Pyridinophane Iron Catalyst"
    Yuto Sakaguchi, Arnau Call, Mihaela Cibian, Kosei Yamauchi and Ken Sakai
    Chem. Commun., 2019, 55, 8552-8555.

  3. "Room-Temperature Benzylic Alkylation of Benzylic Carbonates: Improvement of Palladium Catalyst and Mechanistic Study"
    Ryoichi Kuwano, Masashi Yokogi, Ken Sakai, Shigeyuki Masaoka, Takashi Miura, and Sungyong Won
    Org. Process Res. Dev., 2019, 23, 1568-1579.

  4. "A Molecular Cobalt Hydrogen Evolution Catalyst Showing High Activity and Outstanding Tolerance to CO and O2"
    Jia-Wei Wang, Kosei Yamauchi, Hai-Hua Huang, Jia-Kai Sun, Zhi-Mei Luo, Di-Chang Zhong, Tong-Bu Lu, and Ken Sakai
    Angew. Chem. Int. Ed., 2019, 58, 10923-10927.

  5. "Mechanisms of Water Oxidation using Ruthenium, Cobalt, Copper, and Iron Molecular Catalysts"
    Alexander Rene Parent, Takashi Nakazono, Yuta Tsubonouchi, Natsuki Taira and Ken Sakai
    Adv. Inorg. Chem., 2019, 74, 197-240.

  6. "Highly Efficient and Selective Photocatalytic CO2 Reduction to CO in Water by a Cobalt Porphyrin Molecular Catalyst"
    Arnau Call, Mihaela Cibian, Keiya Yamamoto, Takashi Nakazono, Kosei Yamauchi, and Ken Sakai
    ACS Catal., 2019, 9, 4867-4874.

  7. "Ligand-based PCET Reduction in a Heteroleptic Ni(bpy)(dithiolene) Electrocatalyst Giving Rise to Higher Metal Basicity Required for Hydrogen Evolution"
    Keita Koshiba, Kosei Yamauchi, and Ken Sakai
    ChemElectroChem, 2019, 6, 2273-2281.

  8. "A New Class of Molecular-Based Photoelectrochemical Cell for Solar Hydrogen Production Consisting of Two Mesoporous TiO2 Electrodes"
    Kohei Morita, Ken Sakai, and Hironobu Ozawa
    ACS Appl. Energy Mater., 2019, 2, 987-992.

  9. "Consecutive Ligand-based PCET Processes Affording a Doubly Reduced Nickel Pyrazinedithiolate which Transforms into a Metal Hydride Required to Evolve H2"
    Keita Koshiba, Kosei Yamauchi, and Ken Sakai
    Dalton Trans., 2019, 48, 635-640.

Publications in 2018

  1. "A family of molecular nickel hydrogen evolution catalysts providing tunable overpotentials using ligand-centered proton-coupled electron transfer paths"
    Yutaro Aimoto, Keita Koshiba, Kosei Yamauchi and Ken Sakai
    Chem. Commun., 2018, 54, 12820-12823.

  2. "Photocatalytic H2 Evolution Using a Ru Chromophore Tethered to Six Viologen Acceptors"
    Keiya Yamamoto, Arnau Call and Ken Sakai
    Chem. Eur. J., 2018, 24, 16620-16629. (Selected as a Very Important Paper.)

  3. "Synthesis and Complete Structure Determination of a Sperm-Activating and -Attracting Factor Isolated from the Ascidian Ascidia sydneiensis"
    Tomohiro Watanabe, Hajime Shibata, Makoto Ebine, Hiroshi Tsuchikawa, Nobuaki Matsumori, Michio Murata, Manabu Yoshida, Masaaki Morisawa, Shu Lin, Kosei Yamauchi, Ken Sakai, and Tohru Oishi
    J. Nat. Prod., 2018, 81, 985-997.

  4. "Platinum(II)-glutamic acid dendrimer conjugates: Synthesis, characterization, DFT calculation, conformational analysis and catalytic properties"
    Anas Lataifeh, Heinz-Bernhard Kraatz, Firas F.Awwadi, Mohammed A.Zaitoun and Ken Sakai
    Inorg. Chim. Acta, 2018, 473, 245-254.

  5. "Near-Infrared-Light-Driven Hydrogen Evolution from Water using a Polypyridyl Triruthenium Photosensitizer"
    Yutaro Tsuji, Keiya Yamamoto, Kosei Yamauchi, and Ken Sakai
    Angew. Chem. Int. Ed., 2018, 57, 208-212. (Selected as a Cover Picture.)

Publications in 2017

  1. "A Platinum Porphyrin Modified TiO2 Electrode for Photoelectrochemical Hydrogen Production from Neutral Water Driven by the Conduction Band Edge Potential of TiO2"
    Kohei Morita, Kohei Takijiri, Ken Sakai, and Hironobu Ozawa
    Dalton Trans., 2017, 46, 15181-15185.

  2. "Photochemical H2 Evolution Catalyzed by Porphyrin-based Cubic Cages Singly and Doubly Encapsulating PtCl2(4,4’-dimethyl-2,2’-bipyridine)"
    Shota Tanaka, Takashi Nakazono, Kosei Yamauchi, and Ken Sakai
    Chem. Lett., 2017, 46, 1573-1575. (Selected as a Cover Picture and an Editor's Choice.) Open Access!

  3. "[Pt(SCN)4]2--Based Coordination Polymers and Supramolecular Squares: Intermolecular Pt···H-C Interactions Probed by Luminescence Spectroscopy at Variable Pressure"
    Yan Suffren, Masayuki Kobayashi, Jeffrey S. Ovens, Alexandre Rodrigue-Witchel, Caroline Genre, Ken Sakai, Christian Reber, and Daniel B. Leznoff
    Eur. J. Inorg. Chem., 2017, 2865-2875.

  4. "Highly Stable Chemisorption of Dyes with Pyridyl Anchors over TiO2: Application in Dye-Sensitized Photoelectrochemical Water Reduction in Aqueous Media"
    Kohei Takijiri, Kohei Morita, Takashi Nakazono, Ken Sakai and Hironobu Ozawa
    Chem. Commun., 2017, 53, 3042-3045.

  5. "A Nickel Dithiolate Water Reduction Catalyst Providing Ligand-based Proton-coupled Electron Transfer Pathways"
    Keita Koshiba, Kosei Yamauchi, and Ken Sakai
    Angew. Chem. Int. Ed., 2017, 56, 4247-4251.

  6. "Synthesis and Characterization of a RuPt-based Photo-Hydrogen-Evolving Molecular Device Tethered to a Single Viologen Acceptor"
    Masayuki Miyaji, Kyoji Kitamoto, Hironobu Ozawa, and Ken Sakai
    Eur. J. Inorg. Chem., 2017, 9, 1237-1244.

  7. "Photocatalytic Hydrogen Evolution Driven by [FeFe] Hydrogenase Models Tethered to Fluorene and Silafluorene Sensitizers"
    Roman Goy, Luca Bertini, Tobias Rudolph, Shu Lin, Martin Schulz, Guiseppe Zampella, Benjamin Dietzek, Felix H. Schacher Luca De Gioia, Ken Sakai, and Wolfgang Weigand
    Chem. Eur. J., 2017, 23, 334-345.

Publications in 2016

  1. "Catalytic Systems for Water Splitting"
    Gary W. Brudvig, Joost N. H. Reek, Ken Sakai, Leone Spiccia, and Licheng Sun
    ChemPlusChem, 2016, 81, 1017-1019.

  2. "Towards a Bioinspired-Systems Approach for Solar Fuel Devices"
    Remko J. Detz, Ken Sakai, Leone Spiccia, Gary W. Brudvig, Licheng Sun, and Joost N. H. Reek
    ChemPlusChem, 2016, 81, 1024-1027.

  3. "Improving the robustness of cobalt porphyrin water oxidation catalysts by chlorination of aryl groups"
    Takashi Nakazono and Ken Sakai
    Dalton Trans., 2016, 45, 12649-12652.

  4. "Photochemical Water Oxidation Catalysed by a Water-Soluble Copper Phthalocyanine"
    Ryota Terao, Takashi Nakazono, Alexander Rene Parent, and Ken Sakai
    ChemPlusChem, 2016, 81, 1064-1067.

  5. "Light-induced Water Oxidation Catalyzed by an Oxido-bridged Triruthenium Complex with a Ru-O-Ru-O-Ru Motif"
    Yuta Tsubonouchi, Shu Lin, Alexander Rene Parent, Gary Brudvig, and Ken Sakai
    Chem. Commun., 2016, 52, 8018-8021.

  6. "One-dimensional Magnus-type platinum double salts"
    Christopher H. Hendon, Aron Walsh, Norinobu Akiyama, Yosuke Konno, Takashi Kajiwara, Tasuku Ito, Hiroshi Kitagawa, and Ken Sakai
    Nat. Commun., 2016, 7, 11950. Open Access!

  7. "Improved Photocatalytic Hydrogen Evolution Driven by Chloro(terpyridine)platinum(II) Derivatives Tethered to a Single Pendant Viologen Acceptor"
    Shu Lin, Kyoji Kitamoto, Hironobu Ozawa, and Ken Sakai
    Dalton Trans., 2016, 45, 10643-10654.

  8. "Tris(2,2'-bipyridine)ruthenium Derivatives with Multiple Viologen Acceptors: Quadratic Dependence of Photocatalytic H2 Evolution Rate on the Local Concentration of Acceptor Site"
    Kyoji Kitamoto and Ken Sakai
    Chem. Eur. J., 2016, 35, 12381-12390.

  9. "Molecular photo-charge-separators enabling single-pigment-driven multi-electron transfer and storage leading to H2 evolution from water"
    Kyoji Kitamoto, Makoto Ogawa, Gopalakrishnan Ajayakumar, Shigeyuki Masaoka, Heinz-Bernhard Kraatz, and Ken Sakai
    Inorg. Chem. Front., 2016, 3, 671-680.

  10. "Photochemical H2 Evolution from Water Catalyzed by Dichloro(diphenylbipyridine)platinum(II) Derivative Tethered to Multiple Viologen Acceptors"
    Kyoji Kitamoto and Ken Sakai
    Chem. Commun., 2016, 52, 1385-1388.

Publications in 2015

  1. "Pt(II)-Catalyzed Photosynthesis for H2 Evolution Cycling Between Singly and Triply Reduced Species"
    Keiya Yamamoto, Kyoji Kitamoto, Kosei Yamauchi and Ken Sakai
    Chem. Commun., 2015, 51, 14516-14519.

  2. "Oxygen Evolution Catalysed by a Mononuclear Ruthenium Complex bearing Pendant -SO3- Groups"
    Masaki Yoshida, Mio Kondo, Sena Torii, Ken Sakai, and Shigeyuki Masaoka
    Angew. Chem. Int. Ed., 2015, 54, 7981-7984.

  3. "A tricarboxylated PtCl(terpyridine) derivative exhibiting pH-dependent photocatalytic activity for H2 evolution from water"
    Kosei Yamauchi and Ken Sakai
    Dalton Trans., 2015, 44, 8685-8696.

  4. "Improving Singlet Oxygen Resistance during Photochemical Water Oxidation by Cobalt Porphyrin Catalysts"
    Takashi Nakazono, Alexander Rene Parent and Ken Sakai
    Chem. Eur. J., 2015, 21, 6723-6726.

Publications in 2014

  1. "Three Distinct Redox States of an Oxo-Bridged Dinuclear Ruthenium Complex"
    Masaki Yoshida, Mio Kondo, Toshikazu Nakamura, Ken Sakai, and Shigeyuki Masaoka
    Angew. Chem. Int. Ed., 2014, 53, 11519-11523.

  2. "Progress in Base-Metal Water Oxidation Catalysis"
    Alexander Rene Parent and Ken Sakai
    ChemSusChem, 2014, 7, 2070-2080.

  3. "A Cobalt-NHC Complex as an Improved Catalyst for Photochemical Hydrogen Evolution from Water"
    Ken Kawano, Kosei Yamauchi and Ken Sakai
    Chem. Commun., 2014, 50, 9872-9875.

  4. "Mechanism of Water Oxidation by Non-Heme Iron Catalysts when Driven with Sodium Periodate"
    Alexander Rene Parent, Takashi Nakazono, Shu Lin, Satoshi Utsunomiya and Ken Sakai
    Dalton Trans., 2014, 43, 12501-12513.

  5. "Tuning of Metal-Metal Interactions in Mixed-Valence States of Cyclometalated Dinuclear Ruthenium and Osmium Complexes Bearing Tetrapyridylpyrazine or -benzene"
    Takumi Nagashima, Takuya Nakabayashi, Takashi Suzuki, Katsuhiko Kanaizuka, Hiroaki Ozawa, Yu-Wu Zhong, Shigeyuki Masaoka, Ken Sakai and Masa-aki Haga
    Organometallics, 2014, 33, 4893-4904.

  6. "Hydrogen-bonded frameworks of propylenediamine-N,N'-diacetic acid Pt(II) complexes, synthesis, structural characterization and antitumor activity"
    Hoda A. El-Ghamry, Shigeyuki Masaoka and Ken Sakai
    J. Coord. Chem., 2014, 67, 943-955.

  7. "Pigment-Acceptor-Catalyst Triads for Photochemical Hydrogen Evolution"
    Kyoji Kitamoto and Ken Sakai
    Angew. Chem. Int. Ed., 2014, 53, 4618-4622.

  8. "Mechanistic Studies of Photoinduced Intramolecular and Intermolecular Electron Transfer Processes in RuPt-centred Photo-hydrogen-evolving Molecular Devices"
    Chettiyam Veettil Suneesh, Bijitha Balan, Hironobu Ozawa, Yuki Nakamura, Tetsuro Katayama, Masayasu Muramatsu, Yutaka Nagasawa, Hiroshi Miyasaka and Ken Sakai
    Phys. Chem. Chem. Phys., 2014, 16, 1607-1616.

  9. "Synthesis and characterization of Cu(II), Co(II) and Ni(II) complexes of a number of sulfadrug azodyes and their application for wastewater treatment"
    K. El-Baradie, R. El-Sharkawy, H. El-Ghamry, and K. Sakai
    Spectrochim. Acta, Part A, 2014, 121, 180-187.

Publications in 2013

  1. "Highly Efficient Photocatalytic Water Reduction with Robust Iridium(III) Photosensitizers Containing Arylsilyl Substituents"
    Dong Ryeol Whang, Ken Sakai, and Soo Young Park
    Angew. Chem. Int. Ed., 2013, 52, 11612-11615.

  2. "Cobalt Porphyrins as Homogeneous Catalysts for Water Oxidation"
    Takashi Nakazono, Alexander Rene Parent, and Ken Sakai
    Chem. Commun., 2013, 49, 6325-6327.

  3. "Synthesis and Structure Revision of the C43-C67 Part of Amphidinol 3"
    Makoto Ebine, Mitsunori Kanemoto, Yoshiyuki Manabe, Yosuke Konno, Ken Sakai, Nobuaki Matsumori, Michio Murata, and Tohru Oishi
    Org. Lett., 2013, 15, 2846-2849.

  4. "Heterobimetallic Coordination Polymers Based on the [Pt(SCN)4]2- and [Pt(SeCN)4]2- Building Blocks"
    Masayuki Kobayashi, Didier Savard, Andrew R. Geisheimer, Ken Sakai, and Daniel B. Leznoff
    Inorg. Chem., 2013, 52, 4842-4852.

Publications in 2012

  1. "A Mononuclear Ruthenium Complex Showing Multiple Proton-Coupled Electron Transfer toward Multi-electron Transfer Reactions"
    Masaya Okamura, Masaki Yoshida, Reiko Kuga, Ken Sakai, Mio Kondo, and Shigeyuki Masaoka
    Dalton Trans., 2012, 41, 13081-13089.

  2. "Photoinduced Hydrogen Evolution from Water Based on a Z-Scheme Photosynthesis by a Simple Platinum(II) Terpyridine Derivative"
    Masayuki Kobayashi, Shigeyuki Masaoka, and Ken Sakai
    Angew. Chem. Int. Ed., 2012, 51, 7431-7434.

  3. "Hitoshi Sakai (1930-2008)"
    Ken Sakai
    Applied Geochemistry, 2012, 27, 1681-1687.

  4. "Synthesis, crystal structure, spectroscopic and electrochemical properties, and H2-evolving activity of a new [PtCl(terpyridine)]+ derivative with viologen-like redox properties"
    Masayuki Kobayashi, Shigeyuki Masaoka, and Ken Sakai
    Dalton Trans., 2012, 41, 4903-4911.

  5. "Preparation, Characterization, Biological Activity and 3D Molecular Modeling of Mn(II), Co(II), Ni(II), Cu(II), Pd(II) and Ru(III) Complexes of Some Sulfadrug Schiff Bases"
    Hoda A. El-Ghamry, Ken Sakai, Shigeyuki Masaoka, Kamal Y. El-Baradie, Raafat M. Issa
    Chin. J. Chem., 2012, 30, 881-890.

  6. "Synthesis and characterization of self-assembled coordination polymers of N-diaminomethylene-4-(3-formyl-4-hydroxy-phenylazo)-benzenesulfonamide"
    Hoda El-Ghamry, Ken Sakai, Shigeyuki Masaoka, Kamal El-Baradie, and Raafat Issa
    J. Coord. Chem., 2012, 65, 780-794.

  7. "Tuning of Redox Potentials by Introducing a Cyclometalated Bond to Bis-tridentate Ruthenium(II) Complexes Bearing Bis(Nmethylbenzimidazolyl)benzene or -pyridine Ligands"
    Wen-Wen Yang, Yu-Wu Zhong, Shinpei Yoshikawa, Jiang-Yang Shao, Shigeyuki Masaoka, Ken Sakai, Jiannian Yao, and Masa-aki Haga
    Inorg. Chem., 2012, 51, 890-899.

  8. "Visible Light-induced Water Oxidation Catalyzed by Molybdenum-based Polyoxometalates with Mono- and Dicobalt(III) Cores as Oxygen-Evolving Centers"
    Saya Tanaka, Masahiko Annaka and Ken Sakai
    Chem. Commun., 2012, 48, 1653-1655.

  9. "Self-assembly of Tubular Microstructures from Mixed-valence Metal Complexes and their Reversible Transformation via External Stimuli"
    Keita Kuroiwa, Masaki Yoshida, Shigeyuki Masaoka, Kenji Kaneko, Ken Sakai, and Nobuo Kimizuka
    Angew. Chem. Int. Ed., 2012, 51, 656-659.

  10. "Kinetics and DFT Studies on Water Oxidation by Ce4+ Catalyzed by [Ru(terpy)(bpy)(OH2)]2+"
    Ayano Kimoto, Kosei Yamauchi, Masaki Yoshida, Shigeyuki Masaoka, and Ken Sakai
    Chem. Commun., 2012, 48, 239-241.

Publications in 2011

  1. "Stability of Pt(II)-Based H2-Evolving Catalysts against H2 in Aqueous Solution"
    Kosei Yamauchi, Shigeyuki Masaoka, and Ken Sakai
    Dalton Trans., 2011, 40, 12447-12449.

  2. "Proton-Induced Tuning of Metal-Metal Communication in Rack-Type Dinuclear Ru Complexes Containing Benzimidazolyl Moieties"
    Katsuaki Kobayashi, Masamichi Ishikubo, Katsuhiko Kanaizuka, Keiko Kosuge, Shigeyuki Masaoka, Ken Sakai, Koichi Nozaki, and Masa-aki Haga
    Chem. Eur. J., 2011, 17, 6954-6963.

  3. "Syntheses, Characterization, and Photochemical Properties of Amidate-Bridged Pt(bpy) Dimers Tethered to Ru(bpy)32+ Derivatives"
    Masanari Hirahara, Shigeyuki Masaoka, and Ken Sakai
    Dalton Trans., 2011, 40, 3967-3978.

  4. "Light-Induced Charge Separation and Photocatalytic Hydrogen Evolution from Water using RuIIPtII-Based Molecular Devices: Effects of Introducing Additional Donor and/or Acceptor Sites"
    Gopalakrishnan Ajayakumar, Masayuki Kobayashi, Shigeyuki Masaoka, and Ken Sakai
    Dalton Trans., 2011, 40, 3955-3966.

  5. "Photo-Hydrogen-Evolving Molecular Devices Driving Visible-Light-Induced Water Reduction into Molecular Hydrogen: Structure-Activity Relationship and Reaction Mechanism"
    Hironobu Ozawa and Ken Sakai
    Chem. Commun., 2011, 47, 2227-2242 (Feature Article, invited, Hydrogen Issue).

  6. "Aggregation of [Au(CN)4]- Anions: Detection by 15N CP-MAS NMR and the Structural Factors Influencing Intermolecular Au···N Interactions"
    Andrew Geisheimer, John Wren, Vladimir Michaelis, Masayuki Kobayashi, Ken Sakai, Scott Kroeker, and Daniel Leznoff
    Inorg. Chem., 2011, 50, 1265-1274.

  7. "Platinum(II)-Based Hydrogen-Evolving Catalysts Linked to Multipendant Viologen Acceptors: Experimental and DFT Indications for Bimolecular Pathways"
    Makoto Ogawa, Gopalakrishnan Ajayakumar, Shigeyuki Masaoka, Heinz-Bernhard Kraatz, and Ken Sakai
    Chem. Eur. J., 2011, 17, 1148-1162.

Publications in 2010

  1. "Photocatalytic Hydrogen Production from Water in Self-assembled Supramolecular Iridium-cobalt Systems"
    Sk. Jasimuddin, Tomoko Yamada, Kazunori Fukuju, Joe Otsuki, and Ken Sakai
    Chem. Commun., 2010, 46, 8466-8468.

  2. "Photochemical and Thermal Hydrogen Production from Water Catalyzed by Carboxylate-Bridged Dirhodium(II) Complexes"
    Saya Tanaka, Shigeyuki Masaoka, Kosei Yamauchi, Masahiko Annaka, and Ken Sakai
    Dalton Trans., 2010, 39, 11218-11226.

  3. "Electrocatalytic Oxygen Evolution from Water at an ITO Electrode Modified with [Ru(terpy){4,4'-(CH2PO3H2)2-2,2'-bpy}(OH2)]2+: Evidence for a Unimolecular Pathway"
    Josaku Kiyota, Junpei Yokoyama, Masaki Yoshida, Shigeyuki Masaoka, and Ken Sakai
    Chem. Lett., 2010, 39, 1146-1148.

  4. "Unprecedented Radical-Radical Reaction of a [2.2]Paracyclophane Derivative Containing Imidazolyl Radical Moiety"
    Sayaka Hatano, Ken Sakai, and Jiro Abe
    Org. Lett., 2010, 12, 4152-4155.

  5. "Catalysis of Mononuclear Aquaruthenium Complexes in Oxygen Evolution from Water: A New Radical Coupling Path using Hydroxocerium(IV) Species"
    Masaki Yoshida, Shigeyuki Masaoka, Jiro Abe, and Ken Sakai
    Chem. Asian J., 2010, 5, 2369-2378.

  6. "Syntheses, Characterization, and Photo-Hydrogen-Evolving Properties of Tris(2,2'-bipyridine)ruthenium(II) Derivatives Tethered to an H2-Evolving (2-phenylpyridinato)platinum(II) Unit"
    Masayuki Kobayashi, Shigeyuki Masaoka, and Ken Sakai
    Molecules, 2010, 15, 4908-4923.

  7. "Frontier Orbital Engineering of Photo-Hydrogen-Evolving Molecular Devices: a Clear Relationship Between the H2-Evolving Activity and the Energy Level of the LUMO"
    Shigeyuki Masaoka, Yuichiro Mukawa, and Ken Sakai
    Dalton Trans., 2010, 39, 5868-5876. (Selected as a Hot Article.)

  8. "Photo-Hydrogen-Evolving Molecular Catalysts Consisting of Polypyridyl Ruthenium(II) Photosensitizers and Platinum(II) Catalysts: Insights into the Reaction Mechanism"
    Hironobu Ozawa, Masayuki Kobayashi, Bijitha Balan, Shigeyuki Masaoka, and Ken Sakai
    Chem. Asian J., 2010, 5, 1860-1869.

  9. "Photoinduced Electron Transfer in Tris(2,2'-bipyridine)ruthenium(II)-Viologen Dyads with Peptide Backbones Leading to Long-Lived Charge Separation and Hydrogen Evolution"
    Makoto Ogawa, Bijitha Balan, Gopalakrishnan Ajayakumar, Shigeyuki Masaoka, Heinz-Bernhard Kraatz, Masayasu Muramatsu, Syoji Ito, Yutaka Nagasawa, Hiroshi Miyasaka, and Ken Sakai
    Dalton Trans., 2010, 39, 4421-4434.

Publications in 2009

  1. "Dibromido(2,3,9,10-tetramethyl-1,4,8,11-tetraazacyclotetradeca-1,3,8,10-tetraene)cobalt(III) bromide"
    Hoda El-Ghamry, Raafat Issa, Kamal El-Baradie, Shigeyuki Masaoka, and Ken Sakai
    Acta Cryst., 2009, E65, m1378-m1379. Electronic Reprint(PDF)
    Copyright © International Union of Crystallography Acta Cryst. E65, m1378-m1379

  2. "Kinetic Resolution of P-Chirogenic Compounds by Pd-catalyzed Alcoholysis of Vinyl Ethers"
    Hisashi Itoh, Eiji Yamamoto, Shigeyuki Masaoka, Ken Sakai, and Makoto Tokunaga
    Adv. Synth. Cat., 2009, 351, 1796-1800.

  3. "Evidence for Pt(II)-Based Molecular Catalysis in the Thermal Reduction of Water into Molecular Hydrogen"
    Kosei Yamauchi, Shigeyuki Masaoka, and Ken Sakai
    J. Am. Chem. Soc., 2009, 131, 8404-8406.

  4. "Oxygen Evolution from Water Catalyzed by Mononuclear Ruthenium Complexes with a Triazamacrocyclic Ligand in a Facial Fashion"
    Masaki Yoshida, Shigeyuki Masaoka, and Ken Sakai
    Chem. Lett., 2009, 38, 702-703.

  5. "Photo-Hydrogen-Evolving Activity of Chloro(terpyridine)platinum(II): a Single-Component Molecular Photocatalyst"
    Reiko Okazaki, Shigeyuki Masaoka, and Ken Sakai
    Dalton Trans., 2009, 6127-6133.

  6. "Hydrogen Production from Water Catalyzed by an Air-stable Di-iron Complex with a Bio-relevant Fe2(m-S)2 Core"
    Toshiki Yamaguchi, Shigeyuki Masaoka, and Ken Sakai
    Chem. Lett., 2009, 38, 434-435.

  7. "Bis(2,2'-bipyridine){ethyl4'-[N-(4-carbamoylphenyl)carbamoyl]-2,2'-bipyridine-4-carboxylate}ruthenium(II) bis[hexafluoridophosphate(V)]"
    Masanari Hirahara, Shigeyuki Masaoka, and Ken Sakai
    Acta Cryst., 2009, E65, m228-m229. Electronic Reprint(PDF)
    Copyright © International Union of Crystallography Acta Cryst. E65, m228-m229

  8. "Synthesis, Crystal Structure, Solution and Spectroscopic Properties, and Hydrogen-Evolving Activity of [K(18-Crown-6)][Pt(II)(2-phenylpyridinato)Cl2]"
    Masayuki Kobayashi, Shigeyuki Masaoka, and Ken Sakai
    Photochem. Photobiol. Sci., 2009, 8, 196-203.

  9. "Clear Evidence Showing the Robustness of a Highly Active Oxygen-Evolving Mononuclear Ruthenium Complex with an Aqua Ligand"
    Shigeyuki Masaoka and Ken Sakai
    Chem. Lett., 2009, 38, 182-183.

  10. "Bis(triethylammonium) bis(m-pyrazine-2,3-dithiolato)bis(pyrazine-2,3-dithiolato)diferrate(III) methanol disolvate"
    Toshiki Yamaguchi, Shigeyuki Masaoka, and Ken Sakai
    Acta Cryst., 2009, E65, m77-m78. Electronic Reprint(PDF)
    Copyright © International Union of Crystallography Acta Cryst. E65, m77-m78

Publications in 2008

  1. "Diaqua(1,4,7,10,13-pentaoxacyclopentadecane)iron(II) bis(m -cis-1,2-dicyano-1,2-ethylenedithiolato)bis[(cis-1,2-dicyano-1,2-ethylenedithiolato)ferrate(III)]1,4,7,10,13-pentaoxacyclopentadecanedisolvate"
    Toshiki Yamaguchi, Shigeyuki Masaoka and Ken Sakai
    Acta Cryst., 2008, E64, m1557.Electronic Reprint(PDF)
    Copyright © International Union of Crystallography Acta Cryst. E64, m1557

  2. "Chrolo(dimethylsulfoxide)(phenylpyridinato)platinum(II)"
    Masayuki Kobayashi, Shigeyuki Masaoka and Ken Sakai
    Acta Cryst., 2008, E64, m1325.Electronic Reprint(PDF)
    Copyright © International Union of Crystallography Acta Cryst. E64, m1325

  3. "N-(1,10-phenanthrolin-5-yl)-4-(pyridin-2-yl)benzamide monohydrate"
    Masayuki Kobayashi, Shigeyuki Masaoka and Ken Sakai
    Acta Cryst., 2008, E64, o1979.Electronic Reprint(PDF)
    Copyright © International Union of Crystallography Acta Cryst. E64, o1979

  4. "The use of aurophilic and other metal-metal interactions as crystal engineering design elements to increase structural dimensionality"
    Michael J. Katz, Ken Sakai and Daniel B. Leznoff
    Chem. Soc. Rev., 2008, 37, 1884-1895.

  5. "4-[(3-Formyl-4-hydroxyphenyl)diazenyl]-N-(pyrimidin-2-yl)benzenesulfonamide"
    Hoda El-Ghamry, Raafat Issa, Kamal El-Baradie, Keiko Isagai, Shigeyuki Masaoka and Ken Sakai
    Acta Cryst., 2008, E64, o1673-o1674.Electronic Reprint(PDF)
    Copyright © International Union of Crystallography Acta Cryst. E64, o1673-o1674

  6. "Regio- and p -facial selective Lewis acid interceded Diels-Alder reactions of a -dienyl-b -lactams: an indepth analysis"
    G. Bhargava, A. Anand, M. Mahajan, T. Saito, K. Sakai and C. Medhi
    Tetrahedron, 2008, 64, 6801-6808.

  7. "1-[4-(Diaminomethyleneaminosulfonyl)phenyliminiomethyl]-2-naphtholate N,N-dimethylformamide disolvate"
    Hoda El-Ghamry, Raafat Issa, Kamal El-Baradie, Keiko Isagai, Shigeyuki Masaoka and Ken Sakai
    Acta Cryst., 2008, E64, o1350-o1351.Electronic Reprint(PDF)
    Copyright © International Union of Crystallography Acta Cryst. E64, o1350-o1351

  8. "A Mixed-Valence [MnIIMnIIIMnII] Complex of a Linear Phenol-bis-pyrazole Ligand with an S = 3 Spin Ground State"
    Leoni A. Barrios, Guillem Aromi, Jorge Salinas Uber, Olivier Roubeau, Ken Sakai, Shigeyuki Masaoka, Patrick Gamez and Jan Reedijk
    Eur. J. Inorg. Chem., 2008, 24, 3871-3876.

Publications in 2007

  1. "Homogeneous catalysis of platinum(II) complexes in photochemical hydrogen production from water"
    Ken Sakai and Hironobu Ozawa
    Coord. Chem. Rev., 2007, 251, 2753-2766.

  2. "An Effect of Structural Modification in the Photo-hydrogen-evolving RuIIPtII Dimers"
    Hironobu Ozawa and Ken Sakai
    Chem. Lett., 2007, 36, 920-921.

  3. "The first example of regiospecific magnesium carbenoid 1,3-CH insertion: its mechanism and stereochemistry"
    Shingo Ogata, Shigeyuki Masaoka, Ken Sakai and Tsuyoshi Satoh
    Tetrahedron Letters, 2007, 48, 5017-5021.

  4. "cis-Dichlorobis(4-methylpyridine-kN)platinum(II)"
    Ken Sakai, Yuki Yokoyama and Shigeyuki Masaoka
    Acta Crystallogr., 2007, E63, m97---m99. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E63, m97---m99

  5. "Pt2II and Pt2III dimers containing a Pt2(2,2'-bipyridine)2(m-N,N-dimethylguanidinato)2 unit "
    Ken Sakai, Kazuo Yokokawa and Yoshimi Yokoyama
    Acta Crystallogr.,2007, C63 ,m36---m41. Electronic Reprint(PDF)
    Copyright © International Union of Crystallography Acta Cryst. C63, m36---m41

  6. "Syntheses, Characterization, and Photo-Hydrogen-Evolving Properties of Tris(2,2'-bipyridine)ruthenium(II) Derivatives Tethered to a cis-Pt(II)Cl2 Unit: Insights into the Structure-Activity Relationship"
    Hironobu Ozawa, Yuki Yokoyama, Masa-aki Haga and Ken Sakai
    Dalton Trans., 2007, 1197-1206.

  7. "Enantioselective Epoxidation of Conjugated Z-Olefins with Newly Modified Mn(salen) Complex"
    Hiromichi Egami, Ryo Irie, Ken Sakai and Tsutomu Katsuki
    Chem. Lett., 2007, 36, 46-47.

Publications in 2006

  1. "A Photo-Hydrogen-Evolving Molecular Device Driving Visible-Light-Induced EDTA-Reduction of Water into Molecular Hydrogen"
    Hironobu Ozawa, Masa-aki Haga and Ken Sakai,
    J. Am. Chem. Soc., 2006, 128(15), 4926-4927
    ).

  2. "A Tris(2,2'-bipyridine)ruthenium(II) Derivative Tethered to a cis-PtCl2(amine)2 Moiety : Syntheses, Spectroscopic Properties, and Visible-Light-Induced Scission of DNA"
    Ken Sakai, Hironobu Ozawa, Hajime Yamada, Taro Tsubomura, Mariko Hara, Akon Higuchi and Masa-aki Haga
    Dalton Trans., 2006, 3300-3305.

  3. "Reaction of magnesium cyclopropylidene with N-lithio arylamines: a method for generation of a-amino-substituted cyclopropylmagnesiums and a study for their reactivity with electrophiles"
    Tsuyoshi Satoh, Mariko Miura, Ken Sakai, and Yoshimi Yokoyama
    Tetrahedron, 2006, 4253-4261.

Publications in 2005

  1. "Tetrakis(2-thiopydridone)platinum(II) chloride"
    Mina Mizota, Yoshimi Yokoyama and Ken Sakai
    Acta Crystallogr., 2005, E61, m1433---m1435.Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E61, m1433---m1435

  2. "Dinuclear Mn(II), Ni(II), and Zn(II) Complexes Bridged by Bis(p-nitrophenyl) Phosphate Ion: Relevance to Bimetallic Phosphodiesterase"
    Hitomi Shiraishi, Reiko Jikido, Kanako Matsufuji, Tatsuaki Nakanishi, Takuya Shiga, Masaaki Ohba, Ken Sakai, Hiroshi Kitagawa and Hisashi Okawa
    Bull. Chem. Soc. Jpn., 2005, 78, 1072-1076.

  3. "Construction of Pseudo-Heterochiral and -Homochiral Di-m-oxotitanium(Schiff base) Dimers and Enantioselective Epoxidation Using Aqueous Hydrogen Peroxide"
    K. Matsumoto, Y. Sawada, B. Saito, K. Sakai and T. Katsuki
    Angew. Chem. Int. Ed., 2005, 44, 4935-4939.

  4. "(2,2'-Bipyridine)chloro(4'-tolyl-2,2':6',2''-terpyridine)iridium(III) bis(hexafluorophosphate) acetonitrile disolvate "
    Tomona Yutaka, Shinya Obara, Masa-aki Haga, Yoshimi Yokoyama and Ken Sakai
    Acta Crystallogr., 2005, E61, m1357---m1359. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E61, m1357---m1359

  5. " Highly Diasteroselective and Remarkably -Facially Selective Lewis Acid-Catalysed Diels-Alder Cycloaddition Reactions: Access to Novel 1,3,4-Trisubstituted 2-Azetidinones"
    Gaurav Bhargava, Mohinder P. Mahajan, Takao Saito, Takashi Otani, Mai Kurashima and Ken Sakai
    Eur. J. Org. Chem., 2005, 2397-2405.

  6. "Syntheses and Properties of Emissive Iridium(III) Complexes with Tridentate Benzimidazole Derivatives"
    Tomona Yutaka, Shinya Obara, Satoshi Ogawa, Koichi Nozaki, Noriaki Ikeda, Takeshi Ohno, Youichi Ishii, Ken Sakai and Masa-aki Haga
    Inorg. Chem., 2005, 44, 4737-4746.

  7. "Total Synthesis of Epoxyquinols A, B, and C and Epoxytwinol A and the Reactivity of a 2H-Pyran Derivative as the Diene Component in the Diels-Alder Reaction"
    Mitsuru Shoji, Hiroki Imai, Makoto Mukaida, Ken Sakai, Hideaki Kakeya, Hiroyuki Osada and Yujiro Hayashi
    J. Org. Chem., 2005, 70, 79-91.

Publications in 2004

  1. "Reactive Rigid-Rod Organometallic Polymers Involving Linear Triplatinum Units Connected by p-Conjugated Bisisocyanides"
    Tomoaki Tanase, Eri Goto, Rowshan A. Begum, Makiko Hamaguchi, Shuzhong Zhan, Masayasu Iida and Ken Sakai
    Organometallics, 2004, 23, 5975-5988.

  2. "Electron-Rich Diplatinum(0) Metallocryptate Promoting Novel Successive Encapsulation of Acidic Hydrides"
    Eri Goto, Miho Usuki, Hiroe Takenaka, Ken Sakai and Tomoaki Tanase
    Organometallics, 2004, 23, 6042-6051.

  3. "Linear, Redox-Active Pt6 and Pt2Pd2Pt2 Clusters"
    Eri Goto, Rowshan A. Begum, Shuzhong Zhan, Tomoaki Tanase, Katsumi Tanigaki and Ken Sakai
    Angew. Chem. Int. Ed., 2004, 43, 5029-5032.

  4. "Bis[m-3-(N'-methyl-4,4'-bipyridinium-1-yl)propionamidato] bis[cis-diammineplatinum(II)] hexaperchlorate dihydrate in a head-to-tail isomerism"
    Ken Sakai, Yoshimi Yokoyama, Hideki Hama, Kaoru Kato, Yoshie Ikuta, Taro Tsubomura and Tomoaki Tanase
    Acta Crystallogr.,2004, E60, m664-m667. Electronic Reprint(PDF)
    Copyright © International Union of Crystallography Acta Cryst. E60, m664---m667

  5. "Di-m-pivalamidato-k4N,O-bis[(sulfato)(2,2'-bipyridine-k2N,N')platinum(III)] tetrahydrate in a head-to-tail isomerism"
    Kazuo Yokokawa and Ken Sakai
    Acta Crystallogr.,2004, C60, m244-m247. Electronic Reprint(PDF)
    Copyright © International Union of Crystallography Acta Cryst. C60, m244---m247

  6. "Di-m-aminopyridinato-bis[(2,2'-bipyridine)platinum(II)] dinitrate tetrahydrate in a head-to-tail isomerism"
    Mina Mizota and Ken Sakai
    Acta Crystallogr.,2004, E60, m473-m476. Electronic Reprint(PDF)
    Copyright © International Union of Crystallography Acta Cryst. E60, m473---m476

  7. "The First Bent Form for the Hydroxo-Bridged cis-Diammineplatinum(II) Dimer: [Pt2(NH3)4(m-OH)2](ClO4)2"
    Ken Sakai, Yosuke Konno, Noboru Takayama and Satoru Takahashi
    Acta Crystallogr., 2004, B60, 255-262. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. B60, 255---262

  8. "Di-m-a-pyrrolidinonatobis[cis-diammineplatinum(II)] sulfate hydrate in a Head-to-Head isomerism"
    Ken Sakai, Itsuki Sakai, Neil D. Draper and Daniel B. Leznoff
    Acta Crystallogr., 2004, E60, m273-m276. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E60, m273---m276

  9. "Di-m-a-pyrrolidinonatobis[cis-diamminechloroplatinum(III)] sulfate dihydrate: a head-to-head isomer"
    Ken Sakai, Itsuki Sakai, Takashi Kajiwara and Tasuku Ito
    Acta Crystallogr., 2004, E60, m255-m258. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E60, m255---m258

  10. "(1,10-Phenanthroline)bis(2,2'-bipyridine)ruthenium(II) tetracyanoplatinate(II)"
    Ken Sakai and Yoshinobu Miyabe
    Acta Crystallogr., 2004, C60, m69-m72. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. C60, m69---m72

  11. "Bis[tris(2,2'-bipyridine)ruthenium(II)] hexacyanoferrate(III) chloride octahydrate"
    Ken Sakai, Yuichi Uchida, Takashi Kajiwara and Tasuku Ito
    Acta Crystallogr., 2004, C60, m65-m68. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. C60, m65---m68

  12. "Bis(2-aminopyridine)(2,2'-bipyridine)platinum(II) tetracyanoplatinate(II) dihydrate "
    Ken Sakai, Mina Mizota, and Norinobu Akiyama
    Acta Crystallogr., 2004, E60, m88-m90. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E60, m88---m90

  13. "Bis[di-m-isobutyratobis[cis-diammineplatinum(II)]] tetrakis(perchlorate)"
    Ken Sakai and Eri Ishigami
    Acta Crystallogr.,2004, E60,m65---m68. Electronic Reprint(PDF)
    Copyright © International Union of Crystallography Acta Cryst. E60, m65---m68

Publications in 2003

  1. "Di-m-pivalato-bis[cis-diammineplatinum(II)] bis(perchlorate) pivalic acid solvate"
    Ken Sakai, Eri Ishigami, Kazuo Yokokawa, Takashi Kajiwara and Tasuku Ito
    Acta Crystallogr., 2003, E59, m1178-m1180. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E59, m1178---m1180

  2. "A new synthesis, including asymmetric synthesis, of spiro[4.n]alkenones from three components: cyclic ketones, chloromethyl p-tolyl sulfoxide, and acetonitrile; and a formal total synthesis of racemic acorone"
    Tsuyoshi Satoh, Tadashi Kawashima, Satoru Takahashi and Ken Sakai
    Tetrahedron, 2003, 59, 9599-9607.

  3. "The first examples of an amide-carbonyl stabilized oxiranyl anion: generation from epoxysilane, its properties, and trapping with electrophiles"
    Tsuyoshi Satoh, Takayuki Shimura and Ken Sakai
    Heterocycles, 2003, 59, 137-147.

  4. "A head-to-tail isomer of bis[m-2-(N'-methyl-4,4'-bipyridinium-1-yl)-acetamidato]bis[cis- diammineplatinum(II)] hexaperchlorate dihydrate"
    Ken Sakai, Yoshie Ikuta, Taro Tsubomura, Kaoru Kato, Yoshimi Yokoyama, Takashi Kajiwara and Tasuku Ito
    Acta Crystallogr., 2003, E59, m780-m783. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E59, m780---m783

  5. "Bis(2-aminopyridine)(2,2'-bipyridine)platinum(II) bis(oxalato)platinate(II) dihydrate"
    Ken Sakai, Norinobu Akiyama and Mina Mizota
    Acta Crystallogr. 2003, E59, m636-m638. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E59, m636---m638

  6. "A head-to-head isomer of di-m-pivalamidatobis[(1,10-phenanthroline)platinum(II)] dinitrate dihydrate"
    Ken Sakai, Mai Kurashima, Norinobu Akiyama, Naoki Satoh, Takashi Kajiwara and Tasuku Ito
    Acta Crystallogr. 2003, C59,m345-m349. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. C59, m345---m349

  7. "A head-to-head isomer of di-m-bis(N-methylisonicotinamidato)bis[cis-diammineplatinum(II)] tetraperchlorate"
    Ken Sakai, Meiko Shiomi, Taro Tsubomura, Kaoru Kato, Yoshimi Yokoyama, Takashi Kajiwara, and Tasuku Ito
    Acta Crystallogr., 2003, E59, m559-m561. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E59, m559---m561

  8. "A head-to-head isomer of di-m-a-pyrrolidinonatobis[cis-bromodiammineplatinum(III)] dinitrate"
    Ken Sakai, Tomohiko Sakamoto, Takashi Kajiwara, and Tasuku Ito
    Acta Crystallogr., 2003, E59, m553-m555. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E59, m553---m555

  9. "A head-to-head isomer of Bis{di-m-(5-carboxy-a-pyridonato)bis[cis-diammineplatinum(II)]} tetranitrate dihydrate"
    Ken Sakai and Satoru Takahashi
    Acta Crystallogr. 2003, E59, m532-m535. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E59, m532---m535

  10. "Dichloro(4-amino-2,2'-bipyridine)platinum(II) dihydrate"
    Ken Sakai, Yoshimi Yokoyama, Ken Okamoto and Satoru Takahashi
    Acta Crystallogr. 2003, E59, m518-m520. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E59, m518---m520

  11. "(N-methyl-4,4'-bipyridinium)(2,2':6',2"-terpyridine)platinum(II) triperchlorate hydrate"
    Ken Sakai, Mai Kurashima, Manabu Osada and Satoru Takahashi
    Acta Crystallogr. 2003, E59, m515-m517 Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E59, m515---m517

  12. "(2,2'-Bipyridine)bis(N-methyl-4,4'-bipyridinium)platinum(II) tetraperchlorate"
    Ken Sakai, Manabu Osada, Yoshimi Yokoyama, Yasushi Tomita and Taro Tsubomura
    Acta Crystallogr., 2003, E59, m512-m514. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E59, m512---m514

  13. "Bis(2-aminopyridine)(2,2'-bipyridine)platinum(II) dinitrate dihydrate"
    Ken Sakai, Norinobu Akiyama and Mina Mizota
    Acta Crystallogr. 2003, E59, m459-m461. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E59, m459---m461

  14. "The Direct and Enantioselective, One-pot, Three-component, Cross-Mannich Reaction of Aldehydes"
    Yujiro Hayashi, Tsuboi, Wataru Tsuboi, Ashimine, Itaru Ashimine, Tatsuya Urushima, Mitsuru, Shoji and Ken Sakai
    Angew. Chem. Int. Ed., 2003, 42, 3677-3680.

  15. "N-Methyl-N'-(3-phthalimidopropyl)-4,4'-bipyridinium diiodide"
    Ken Sakai, Ken Okamoto, Satoru Takahashi and Kazuo Yokokawa
    Acta Crystallogr., 2003, E59, o917-o918. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E59, o917---o918

  16. "Di-m-pivalatobis[cis-diammineplatinum(II)] sulfate hydrate"
    Ken Sakai, Eri Ishigami, Kazuo Yokokawa, Takashi Kajiwara and Tasuku Ito
    Acta Crystallogr., 2003, E59, m443-m445. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E59, m443---m445

  17. "[m-2,3,5,6-Tetrakis(2-pyridyl)pyrazine]bis[chloroplatinum(II)] Bis[trichloro(dimethylsulfoxide-S)platinate(II)]"
    Ken Sakai and Mai Kurashima
    Acta Crystallogr., 2003, E59, m411-m413. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E59, m411---m413

  18. "Bis(guanidinium) bis(oxalato)platinate(II)"
    Ken Sakai, Norinobu Akiyama, Mina Mizota, Kazuo Yokokawa and Yoshimi Yokoyama
    Acta Crystallogr., 2003, E59, m408-m410. Electronic Reprint (PDF)
    Copyright © International Union of Crystallography Acta Cryst. E59, m408---m410

Publications in 2002

  1. "Synthesis of dl-12-Epiverticillol"
    Tadahiro Kato, Masahiro Hoshikawa, Yoshihiro Yaguchi, Kiyokazu Izumi ,Yukio Uotsu and Ken Sakai
    Tetrahedron, 2002, 58, 9213-9222.

  2. "New Partially-Oxideized 1-D Platinum Chain Complexes Consisting of Carboxylate-Bridged cis-Diammineplatinum Dimer Cations"
    Ken Sakai, Eri Ishigami, Yosuke Konno, Takashi Kajiwara and Tasuku Ito
    J. Am. Chem. Soc., 2002, 124, 12088-12089.

  3. "Asymmetric Total Synthesis of (-)-Azaspirene, a Novel Angiogenesis Inhibitor"
    Yujiro Hayashi, Mitsuru Shoji, Junichiro Yamaguchi, Kenji Sato, Shinpei Yamaguchi, Takasuke Mukaiyama, Ken Sakai, Yukihiro Asami, Hideaki Kakeya and Hiroyuki Osada
    J. Am. Chem. Soc., 2002, 124, 12078-12079.

  4. "A new method for synthesis of allenes, including an optically active form, from aldehydes and alkenyl aryl sulfoxides by sulfoxide-metal exchange as the key reaction and an application to a total synthesis of male bean weevil sex attractant"
    Tsuyoshi Satoh, Noriko Hanaki, Yuko Kuramochi, Yujiro Inoue, Kayo Hosoya and Ken Sakai
    Tetrahedron, 2002, 58, 2533-2549.

Publications in 2001

  1. "Synthesis and Structure of New Binuclear Organopalladium Macrocyclic Complexes"
    T. Tsubomura, Takayuki Tanihata, Tetsuya Yamakawa, Rakuko Ohmi, Tsuyoshi Tamane, Akon Higuchi, Akira Katoh and K. Sakai
    Organometallics, 2001, 20，3833-3835.

Publications in 2000

  1. "A Hexaimino Cryptand containing Naphthyl Groups ; Structural Characterization of Mononuclear Complexes and Catalysis in Hydrolysis of p-Nitro Phosphate"
    T. Tsubomura, M. Ezawa, T. Sato and K. Sakai
    Inorg. Chim. Acta., 2000, 310，265-267.

  2. "Ocillation of Membrane Potential in Immobilized DNA Membranes"
    Akon Higuchi, Shinya Adachi, Takeshi Imizu, Yoon Boo Ok, Taro Tsubomura, Mariko Hara and Ken Sakai
    J. Phys. Chem. B, 2000, 104, 9864-9872.

  3. "Syntheses, Crystal Structures, and Molecular Mechanics Studies of a New Antitumor-Active cis-PtCl2(pzH)2 (pzH=Pyrazole) and the Related Complexes. A Novel Magnus-Type Double-Salt [Pt(pzH)4][PtCl4][cis-PtCl2(pzH)2]2 Involving Two Perpendicularly Aligned 1D Chains."
    Ken Sakai, Yasushi Tomita, Takuma Ue, Koji Goshima, Masakatsu Ohminato, Taro Tsubomura, Kazuko Matsumoto, Kenji Ohmura and Kazuyuki Kawakami
    Inorg. Chim. Acta., 2000, 2971-2, 64-71.

Publications in 1999

  1. "Structures and Reactivities of Platinum-Blues and the Related Amidate-Bridged PlatinumIII Compounds"
    Kazuko Matsumoto and Ken Sakai
    Adv. Inorg. Chem., 1999, 49, 375-427.

  2. "Recent Development in the Platinum-Blue Chemistry"
    Ken Sakai and Taro Tsubomura
    Coordination Chemistry at the Turn of the Century, G. Odrejovic and A. Sirota ed.; Slovak Technical University Press, Bratislava, 1999, 4, 295-300.

  3. "Transesterification by (Hydroxo)nickel(II) Complex in the Presence of External Alcohol"
    Masami Ito, Ken Sakai, Taro Tsubomura and Yu-saku Takita
    Bull. Chem. Soc. Jpn., 1999, 72, 239-247.

  4. "18-Membered Tetraimino Macrocyclic Complexes Containing Furan Groups; Stacking of Two Macrocycles and Characterization of Organic Derivatives"
    Taro Tsubomura, Mitsuru Ito and Ken Sakai
    Inorg. Chim. Acta., 1999, 284, 149.

Publications in 1998

  1. "The Syntheses of (Chloro) Iron(II) Complexes by Using Tridentate Polypyridine Ligands"
    Masami Ito, Yu-saku Takita, Ken Sakai and Taro Tsubomura
    Chem. Lett., 1998, 1185.

  2. "A New One-Dimensional Platium System Consisting of Carboxylate-Bridged cis-Diammineplatinum Dimers"
    Ken Sakai, Masao Takeshita, Yuko Tanaka, Takuma Ue, Masayuki Yanagisawa, Masaya Kosaka, Taro Tsubomura and Masamichi Ato
    J. Am. Chem. Soc., 1998, 120, 11353-11363.

  3. "New Structural Aspects of a-Pyrrolidinonate-Bridged and a-Pyridonate-Bridged, Homo- and Mixed-Valence, Di- and Tetranuclear cis-Diammineplatinum Complexes: Eight New Crystal Structures, Stoichiometric 1:1 Mixture of Pt(2.25+)4 and Pt(2.5+)4, New Quasi-One-Dimensional Halide-Bridged [Pt(2.5+)4-Cl···]∞ System, and Consideration for Solution Properties"
    Ken Sakai, Yuko Tanaka, Yuriko Tsuchiya, Kentaro Hirata, Taro Tsubomura, Seiichiro Iijima and Ashis Bhattacharjee
    J. Am. Chem. Soc., 1998, 120, 8366-8379.

  4. "Photochemical Reactions of Palladium(0) and Platinum(0) Phosphine Complexes"
    Taro Tsubomura and Ken Sakai
    Coord. Chem. Rev., 1998, 171, 107-113.

  5. "Bis[μ-methylenebis(dicyclohexylphosphine)-P:P']bis[chloropalladium(I)](Pd-Pd) Diacetonitrile Solvate"
    Miho Hashioka, Ken Sakai and Taro Tsubomura
    Acta Crystallogr., 1998, C54, 1244-1247.

Publications in 1997

  1. "Photochemical C-C Bond Formation from Chlorobenzene Mediated by [Pd(PPh3)4]"
    Taro Tsubomura, Akira Ishikura, Kenta Hoshino, Hiroki Narita, and Ken Sakai
    Chem. Lett., 1997, 1171-1172.

  2. "Synthesis, Characterization, and Interaction with DNA of A New Cis-Diamminedichloroplatinum(II)-Derivative Having a Polypyridyl Ruthenium(II) Emitter"
    Ken Sakai and Taro Tsubomura
    J. Inorg. Biochem., 1997, 67, 349.

  3. "Syntheses, Structures, and Conformational Studies of N-Carbamoylmethylpyridinium Perchlorate and N-Carbamoylmethyl-N'-methyl-4,4'-bipyridinium Bis(perchlorate) Hydrate"
    Ken Sakai, Yoshie Ikuta, Meiko Shiomi, Tsuyoshi Tamane, Yasushi Tomita, Taro Tsubomura and Nobukatsu Nemoto
    Acta Crystallogr., 1997, C53, 331-334.

Publications in 1996

  1. "A Novel Tetranuclear Iron(III) Complex having L-Alanine Bridges and an Unprecedented (Fe4(OH2)) Core"
    Shigenobu Yano, Tomoko Inagaki, Yasuko Yamada, Masako Kato, Mikio Yamasaki, Ken Sakai, Taro Tsubomura, Mitsunobu Sato, Wasuke Mori, Kazuya Yamaguchi and Isamu Kinoshita
    Chem. Lett., 1996, 61.

  2. "Molecular Structure of 1,3-Disubstituted p-Allyl Palladium(II) Complexes with a Chiral Diphosphine: The Intermediate of Palladium-catalyzed Asymmetric Allylic Alkylation"
    Motowo Yamaguchi, Masayuki Yabuki, Takamichi Yamagishi, Ken Sakai and Taro Tsubomura
    Chem. Lett., 1996, 241-242.

  3. "Triple-Decker Sandwich Structure of a New Rubidium(I) Tetraimino Macrocyclic Complex"
    Mitsuru Ito, Tadanobu Sato, Ken Sakai and Taro Tsubomura
    Chem. Lett., 1996, 619-620.

  4. "Syntheses and Crystal Structures of Ruthenium Complexes of 1,4,8,11-Tetraazacyclotetradecane, Tris(2-aminoethyl)amine (tren) and Bis(2-aminoethyl)(iminomethyl)amine. A Microporous Layered Structure Consisting of {[K(tren)]2[RuCl6]}nn- and {(H5O2)4[RuCl6]}nn+"
    Ken Sakai, Yasutaka Yamada and Taro Tsubomura
    Inorg. Chem., 1996, 35, 3163-3172.

  5. "Novel Two Types of Metal Complexes Derived from Tripod Amines and Acetylacetone"
    Tadanobu Sato, Harumi Takeda, Ken Sakai and Taro Tsubomura
    Inorg. Chim. Acta, 1996, 246, 413-421.

  6. "A Cryptand Containing Three Diiminopyridyl Units; Aromatic-Aromatic Interaction and the Stability of the Complexes"
    Tadanobu Sato, Ken Sakai and Taro Tsubomura
    Supramol. Chem., 1996, 7, 157-165.

  7. "Synthesis, Crystal Structure, and Solution Properties of a Hexacopper(II) Complex with Bridging Hydroxides, Pyrazolates and Nitrates"
    Ken Sakai, Yasutaka Yamada, Taro Tsubomura, Masayuki Yabuki and Motowo Yamaguchi
    Inorg. Chem., 1996, 35, 542-544.

  8. "Di-m-pyrazolato-N:N'-bis[(2,2'-bipyridine-N:N')platinum(II)] Bis(tetrafluoroborate) Monohydrate"
    Ken Sakai, Tadanobu Sato, Taro Tsubomura and Kazuko Matsumoto
    Acta Crystallogr., 1996, C52, 783-786.

  9. "Two Different Crystal Forms of cis-Diamminebis(pyrazole)platinum(II) Dinitrate"
    Ken Sakai, Akira Ishikura, Taro Tsubomura and Kazuko Matsumoto
    Acta Crystallogr., 1996, C52, 779-783.

  10. "[MnIII4(m3-O)2(m-O2CMe)7(2,2'-bipyridine)2](ClO4)"
    Tsuyoshi Tamane, Taro Tsubomura and Ken Sakai
    Acta Crystallogr., 1996, C52, 777-779.

  11. "Syntheses and Structures of a Novel Trinaphthylene Hexaimino Cryptand: Three Different Conformations of a Macrobicyclic Ligand"
    Tadanobu Sato, Atsushi Suzuki, Ken Sakai and Taro Tsubomura
    Bull. Chem. Soc. Jpn., 1996, 69, 379-388.

  12. "[N,N'-Bis(2-aminoethyl-N)-N,N'-bis(2-ammonioethyl)ethylenediamine-N,N']platinum(II) Bis(tetrachloroplatinate) Trihydrate"
    Ken Sakai, Yuko Tanaka and Taro Tsubomura
    Acta Crystallogr., 1996, C52, 541-543.

Publications in 1995

  1. "Structure and Photophysical Properties of [Pt0(BINAP)2] (BINAP = 2,2'- bis(diphenylphosphino)-1,1'-binaphthyl)"
    Hiroshi Tominaga, Ken Sakai and Taro Tsubomura
    J. Chem. Soc., Chem. Commun., 1995, 2273-2274.

  2. "Structures and Magnetic Properties of Iron(III) Dinuclear Complexes with Alkoxo and Carboxylato Bridges"
    Masako Kato, Yasuko Yamada, Tomoko Inagaki, Wasuke Mori, Ken Sakai, Taro Tsubomura, Mitsunobu Sato and Shigenobu Yano
    Inorg. Chem., 1995, 34, 2645-2651.

  3. "Ab Initio MO and X-ray Studies of Excited States in Molecular Crystals of 4-(b,b-Dicyanovinyl)-3-methyl-N-methyl-N-benzylaniline"
    Jiro Abe, Yasuo Shirai, Ken Sakai and Taro Tsubomura
    J. Phys. Chem., 1995, 99, 8108-8120.

  4. "Reactions of an a-Pyrrolidonate-Bridged cis-Diammineplatinum(II) Dimer with Molecular Oxygen and Its Application to the Catalytic O2 Oxidation of Hydroquinone"
    Ken Sakai, Taro Tsubomura and Kazuko Matsumoto
    Inorg. Chim. Acta, 1995, 234, 157-161.

Publications in 1994

  1. "Photoreaction of Palladium Phosphine Complex with Chloroalkane. Production of Ethylene with 1,2-Dichloroethane and Novel Photochromic Behavior."
    Taro Tsubomura, Atsushi Itsuki, Masahiko Homma and Ken Sakai
    Chem. Lett., 1994, 661-664.

Publications in 1993

  1. "Conformational Change of a Macrobicyclic Complex. Structure of Free Ligand and Interactions with DMSO"
    Tadanobu Sato, Ken Sakai and Taro Tsubomura
    Chem. Lett., 1993, 859-862.

  2. "Redox Disproportionation Cleavage of an a-Pyrrolidonate-Bridged Mixed-Valent Tetranuclear Platinum Complex"
    Ken Sakai, Taro Tsubomura and Kazuko Matsumoto
    Inorg. Chim. Acta, 1993, 213, 11-16.

  3. "Homogeneous Catalysis of Mixed-Valent Octanuclear Platinum Complexes in Photochemical Hydrogen Production from Water"
    Ken Sakai, Yukio Kizaki, Taro Tsubomura and Kazuko Matumoto
    J. Mol. Catal., 1993, 79, 141-152.

Publications in 1992

  1. "Axial Ligand Substitution Equilibria with Chloride Anion on a-Pyrrolidonate-Bridged cis-Diammineplatinum(III) Dimer"
    Ken Sakai, Yuriko Tsuchiya and Taro Tsubomura
    Technol. Rep. Seikei Univ., 1992, 54, 77-78.

  2. "Synthesis and Characterization of Barium(II) Macrobicyclic Complexes and Related Compounds"
    Taro Tsubomura, Tadanobu Sato, Kouichi Yasaku, Ken Sakai, Kimiko Kobayashi and Makoto Morita
    Chem. Lett., 1992, 731-734.

  3. "Syntheses, Crystal Structures, and Electronic, ESR and X-Ray Photoelectron Spectra of Acetamidate- and 2-Fluoroacetamidate-Bridged Mixed-Valent Octanuclear Platinum Blues"
    Kazuko Matsumoto, Ken Sakai, Kyosuke Nishio, Yasuhiro Tokisue, Reikichi Ito, Toshikazu Nishide and Yushi Shichi
    J. Am. Chem. Soc., 1992, 114, 8110-8118.

Publications in 1991

  1. "Crystal Structure of cis-Bis(acetonitrile)tetrakis(trimethylphosphite)iron(II) Tetrachlorotetrakis(m3-sulfido)tetraferrate(2II,2III)"
    Masaki Kawano, Chikara Hoshino, Ken Sakai and Kazuko Matsumoto
    Anal. Sci., 1991, 7, 829-830.

  2. "Crystal Structure of 2-Fluoroacetamidate-Bridged Mixed-Valent Octanuclear Platinum Blue with Average Platinum Oxidation State of 2.08, [Pt8(NH3)16(CH2FCONH)8](NO3)8.66·4H2O"
    Ken Sakai, Kazuko Matsumoto and Kyosuke Nishio
    Chem. Lett., 1991, 1081-1084.

  3. "Oxidation of Benzene to Phenol with Hydrogen Peroxide Catalyzed by a-Pyrrolidonate-Bridged Mixed-Valent Tetranuclear Platinum Complexes"
    Ken Sakai and Kazuko Matsumoto
    J. Mol. Catal., 1991, 67, 7-18.

Publications in 1990

  1. "Homogeneous Catalysis of Platinum Blue Related Complexes in Photoreduction of Water into Hydrogen"
    Ken Sakai and Kazuko Matsumoto
    J. Mol. Catal., 1990, 62, 1-14.

Publications in 1989

  1. "Mixed-Valent Octanuclear Platinum Acetamide Complex, [Pt8(NH3)16(C2H4NO)8]10+"
    Ken Sakai and Kazuko Matsumoto
    J. Am. Chem. Soc., 1989, 111, 3074-3075.

Publications in 1988

  1. "Photochemical Reduction of Water to Hydrogen Catalyzed by Mixed-Valent Tetranuclear Platinum Complex"
    Ken Sakai and Kazuko Matumoto
    J. Coord. Chem., 1988, 18, 169-172.