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Ken Sakai

Professor

  • 5478 Citations
  • 40 h-Index
1988 …2019
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Research Output 1988 2019

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Article
2019
4 Citations (Scopus)

A Molecular Cobalt Hydrogen Evolution Catalyst Showing High Activity and Outstanding Tolerance to CO and O2

Wang, J. W., Yamauchi, K., Huang, H. H., Sun, J. K., Luo, Z. M., Zhong, D. C., Lu, T. B. & Sakai, K., Aug 5 2019, In : Angewandte Chemie - International Edition. 58, 32, p. 10923-10927 5 p.

Research output: Contribution to journal › Article

Carbon Monoxide
Cobalt
Hydrogen
Catalysts
Phosphates

A Molecular Cobalt Hydrogen Evolution Catalyst Showing High Activity and Outstanding Tolerance to CO and O₂

Wang, J-W., Yamauchi, K., Huang, H-H., Sun, J-K., Luo, Z-M., Zhong, D-C., Lu, T-B. & Sakai, K., Jun 4 2019, In : Angewandte Chemie - International Edition.

Research output: Contribution to journal › Article

Carbon Monoxide
Cobalt
Hydrogen
Catalysts
Phosphates
1 Citation (Scopus)

An earth-abundant system for light-driven CO2 reduction to CO using a pyridinophane iron catalyst

Sakaguchi, Y., Call, A., Cibian, M., Yamauchi, K. & Sakai, K., Jan 1 2019, In : Chemical Communications. 55, 59, p. 8552-8555 4 p.

Research output: Contribution to journal › Article

Photosensitizers
Carbon Monoxide
Iron
Earth (planet)
Irradiation
2 Citations (Scopus)

A New Class of Molecular-Based Photoelectrochemical Cell for Solar Hydrogen Production Consisting of Two Mesoporous TiO 2 Electrodes

Morita, K., Sakai, K. & Ozawa, H., Feb 25 2019, In : ACS Applied Energy Materials. 2, 2, p. 987-992 6 p.

Research output: Contribution to journal › Article

Photoelectrochemical cells
Hydrogen production
Electromotive force
Electrodes
Electron injection
3 Citations (Scopus)

Consecutive ligand-based PCET processes affording a doubly reduced nickel pyrazinedithiolate which transforms into a metal hydride required to evolve H 2

Koshiba, K., Yamauchi, K. & Sakai, K., Jan 1 2019, In : Dalton Transactions. 48, 2, p. 635-640 6 p.

Research output: Contribution to journal › Article

Nickel
Hydrides
Protons
Hydrogen
Metals
5 Citations (Scopus)

Highly Efficient and Selective Photocatalytic CO2 Reduction to CO in Water by a Cobalt Porphyrin Molecular Catalyst

Call, A., Cibian, M., Yamamoto, K., Nakazono, T., Yamauchi, K. & Sakai, K., Jun 7 2019, In : ACS Catalysis. 9, 6, p. 4867-4874 8 p.

Research output: Contribution to journal › Article

Porphyrins
Carbon Monoxide
Cobalt
Catalysts
Photosensitizers
1 Citation (Scopus)

Ligand-Based PCET Reduction in a Heteroleptic Ni(bpy)(dithiolene) Electrocatalyst Giving Rise to Higher Metal Basicity Required for Hydrogen Evolution

Koshiba, K., Yamauchi, K. & Sakai, K., Apr 15 2019, In : ChemElectroChem. 6, 8, p. 2273-2281 9 p.

Research output: Contribution to journal › Article

Electrocatalysts
Alkalinity
Protons
Hydrogen
1,2-benzenedicarbonitrile

Photochemical CO2 Reduction Driven by Water-Soluble Copper(I) Photosensitizer with the Catalysis Accelerated by Multi-Electron Chargeable Cobalt Porphyrin

Zhang, X., Cibian, M., Call, A., Yamauchi, K. & Sakai, K., Jan 1 2019, (Accepted/In press) In : ACS Catalysis. p. 11263-11273 11 p.

Research output: Contribution to journal › Article

Photosensitizing Agents
Photosensitizers
Porphyrins
Carbon Monoxide
Cobalt
1 Citation (Scopus)

Room-Temperature Benzylic Alkylation of Benzylic Carbonates: Improvement of Palladium Catalyst and Mechanistic Study

Kuwano, R., Yokogi, M., Sakai, K., Masaoka, S., Miura, T. & Won, S., Aug 16 2019, In : Organic Process Research and Development. 23, 8, p. 1568-1579 12 p.

Research output: Contribution to journal › Article

Carbonates
alkylation
Alkylation
Palladium
palladium
2018
8 Citations (Scopus)

A family of molecular nickel hydrogen evolution catalysts providing tunable overpotentials using ligand-centered proton-coupled electron transfer paths

Aimoto, Y., Koshiba, K., Yamauchi, K. & Sakai, K., Nov 13 2018, In : Chemical communications (Cambridge, England). 54, 91, p. 12820-12823 4 p.

Research output: Contribution to journal › Article

Nickel
Protons
Hydrogen
Ligands
Catalysts

A family of molecular nickel hydrogen evolution catalysts providing tunable overpotentials using ligand-centered proton-coupled electron transfer paths

Aimoto, Y., Koshiba, K., Yamauchi, K. & Sakai, K., Oct 20 2018, In : Chemical Communications. 91, p. 12820-12823 3 p.

Research output: Contribution to journal › Article

Nickel
Protons
Hydrogen
Ligands
Catalysts
6 Citations (Scopus)

Photocatalytic H2 Evolution Using a Ru Chromophore Tethered to Six Viologen Acceptors

Yamamoto, K., Call, A. & Sakai, K., Nov 7 2018, In : Chemistry - A European Journal. 24, 62, p. 16620-16629 10 p.

Research output: Contribution to journal › Article

Viologens
Chromophores
Separators
Electrons
Durability
1 Citation (Scopus)

Platinum(II)-glutamic acid dendrimer conjugates: Synthesis, characterization, DFT calculation, conformational analysis and catalytic properties

Lataifeh, A., Kraatz, H. B., Awwadi, F. F., Zaitoun, M. A. & Sakai, K., Mar 24 2018, In : Inorganica Chimica Acta. 473, p. 245-254 10 p.

Research output: Contribution to journal › Article

Dendrimers
glutamic acid
dendrimers
Platinum
Discrete Fourier transforms
1 Citation (Scopus)

Synthesis and complete structure determination of a sperm-activating and -attracting factor isolated from the ascidian ascidia sydneiensis

Watanabe, T., Shibata, H., Ebine, M., Tsuchikawa, H., Matsumori, N., Murata, M., Yoshida, M., Morisawa, M., Lin, S., Yamauchi, K., Sakai, K. & Oishi, T., Apr 27 2018, In : Journal of Natural Products. 81, 4, p. 985-997 13 p.

Research output: Contribution to journal › Article

Ergosterol
Urochordata
Biological Products
Ketones
Eggs
2017
1 Citation (Scopus)

[Pt(SCN)4]2–-Based Coordination Polymers and Supramolecular Squares: Intermolecular Pt···H–C Interactions Probed by Luminescence Spectroscopy at Variable Pressure

Suffren, Y., Kobayashi, M., Ovens, J. S., Rodrigue-Witchel, A., Genre, C., Sakai, K., Reber, C. & Leznoff, D. B., Jun 16 2017, In : European Journal of Inorganic Chemistry. 2017, 22, p. 2865-2875 11 p.

Research output: Contribution to journal › Article

Luminescence
Polymers
Spectroscopy
Ligands
Ions
24 Citations (Scopus)

A Nickel Dithiolate Water Reduction Catalyst Providing Ligand-Based Proton-Coupled Electron-Transfer Pathways

Koshiba, K., Yamauchi, K. & Sakai, K., Jan 1 2017, In : Angewandte Chemie - International Edition. 56, 15, p. 4247-4251 5 p.

Research output: Contribution to journal › Article

Nickel
Protons
Hydrogen
Ligands
Catalysts
9 Citations (Scopus)

A platinum porphyrin modified TiO2 electrode for photoelectrochemical hydrogen production from neutral water driven by the conduction band edge potential of TiO2

Morita, K., Takijiri, K., Sakai, K. & Ozawa, H., Jan 1 2017, In : Dalton Transactions. 46, 44, p. 15181-15185 5 p.

Research output: Contribution to journal › Article

Porphyrins
Hydrogen production
Platinum
Conduction bands
Electrodes

A Platinum Porphyrin Modified TiO2 Electrode for Photoelectrochemical Hydrogen Production from Neutral Water Driven by the Conduction Band Edge Potential of TiO2

Morita, K., Takijiri, K., Sakai, K. & Ozawa, H., Oct 5 2017, In : Dalton Transactions. DOI: 10.1039/c7dt03710d.

Research output: Contribution to journal › Article

19 Citations (Scopus)

Highly stable chemisorption of dyes with pyridyl anchors over TiO2: Application in dye-sensitized photoelectrochemical water reduction in aqueous media

Takijiri, K., Morita, K., Nakazono, T., Sakai, K. & Ozawa, H., Jan 1 2017, In : Chemical Communications. 53, 21, p. 3042-3045 4 p.

Research output: Contribution to journal › Article

Photoelectrochemical cells
Organophosphonates
Ruthenium
Chemisorption
Anchors
20 Citations (Scopus)

Near-Infrared-Light-Driven Hydrogen Evolution from Water using a Polypyridyl Triruthenium Photosensitizer

Tsuji, Y., Yamamoto, K., Yamauchi, K. & Sakai, K., Nov 2 2017, In : Angewandte Chemie - International Edition. DOI: 10.1002/anie.201708996.

Research output: Contribution to journal › Article

12 Citations (Scopus)

Photocatalytic Hydrogen Evolution Driven by [FeFe] Hydrogenase Models Tethered to Fluorene and Silafluorene Sensitizers

Goy, R., Bertini, L., Rudolph, T., Lin, S., Schulz, M., Zampella, G., Dietzek, B., Schacher, F. H., De Gioia, L., Sakai, K. & Weigand, W., Jan 5 2017, In : Chemistry - A European Journal. 23, 2, p. 334-345 12 p.

Research output: Contribution to journal › Article

Hydrogenase
Photocatalysis
Fluorenes
Hydrogen
Sodium dodecyl sulfate
1 Citation (Scopus)

Photochemical H2 evolution catalyzed by porphyrin-based cubic cages singly and doubly encapsulating PtCl2 (4,4'-dimethyl-2,2'-bipyridine)

Tanaka, S., Nakazono, T., Yamauchi, K. & Sakai, K., Jan 1 2017, In : Chemistry Letters. 46, 10, p. 1573-1575 3 p.

Research output: Contribution to journal › Article

Porphyrins
Catalysts
Photosensitizing Agents
Electrons
Edetic Acid

Photochemical H2 Evolution Catalyzed by Porphyrin-based Cubic Cages Singly and Doubly Encapsulating PtCl2(4,4’-dimethyl-2,2’-bipyridine)

Tanaka, S., Nakazono, T., Yamauchi, K. & Sakai, K., Aug 10 2017, In : Chemistry Letters. 46, p. 1573 1575 p.

Research output: Contribution to journal › Article

2 Citations (Scopus)

Synthesis and Characterization of a RuPt-Based Photo-Hydrogen-Evolving Molecular Device Tethered to a Single Viologen Acceptor

Miyaji, M., Kitamoto, K., Ozawa, H. & Sakai, K., Mar 3 2017, In : European Journal of Inorganic Chemistry. 2017, 9, p. 1237-1244 8 p.

Research output: Contribution to journal › Article

Viologens
Hydrogen
Edetic Acid
Electrons
Excited states
2016
6 Citations (Scopus)

Improved photocatalytic hydrogen evolution driven by chloro(terpyridine)platinum(II) derivatives tethered to a single pendant viologen acceptor

Lin, S., Kitamoto, K., Ozawa, H. & Sakai, K., Jan 1 2016, In : Dalton Transactions. 45, 26, p. 10643-10654 12 p.

Research output: Contribution to journal › Article

Viologens
Hydrogen
Edetic Acid
Derivatives
Electrons
9 Citations (Scopus)

Improving the robustness of cobalt porphyrin water oxidation catalysts by chlorination of aryl groups

Nakazono, T. & Sakai, K., Jan 1 2016, In : Dalton Transactions. 45, 32, p. 12649-12652 4 p.

Research output: Contribution to journal › Article

Chlorination
Porphyrins
Cobalt
Oxidation
Singlet Oxygen
19 Citations (Scopus)

Light-induced water oxidation catalyzed by an oxido-bridged triruthenium complex with a Ru-O-Ru-O-Ru motif

Tsubonouchi, Y., Lin, S., Parent, A. R., Brudvig, G. W. & Sakai, K., 2016, In : Chemical Communications. 52, 51, p. 8018-8021 4 p.

Research output: Contribution to journal › Article

Oxidation
Water
Catalysts
Crystal structure
Electrons
13 Citations (Scopus)

Molecular photo-charge-separators enabling single-pigment-driven multi-electron transfer and storage leading to H2 evolution from water

Kitamoto, K., Ogawa, M., Ajayakumar, G., Masaoka, S., Kraatz, H. B. & Sakai, K., May 1 2016, In : Inorganic Chemistry Frontiers. 3, 5, p. 671-680 10 p.

Research output: Contribution to journal › Article

Separators
Pigments
Viologens
Electrons
Water
10 Citations (Scopus)

One-dimensional Magnus-type platinum double salts

Hendon, C. H., Walsh, A., Akiyama, N., Konno, Y., Kajiwara, T., Ito, T., Kitagawa, H. & Sakai, K., Jun 20 2016, In : Nature communications. 7, 11950.

Research output: Contribution to journal › Article

Platinum
platinum
Salts
salts
Oxidation
15 Citations (Scopus)

Photochemical H2 evolution from water catalyzed by a dichloro(diphenylbipyridine)platinum(ii) derivative tethered to multiple viologen acceptors

Kitamoto, K. & Sakai, K., Jan 25 2016, In : Chemical Communications. 52, 7, p. 1385-1388 4 p.

Research output: Contribution to journal › Article

Viologens
Platinum
Derivatives
Water
Photocatalysts
24 Citations (Scopus)

Photochemical Water Oxidation Catalyzed by a Water-Soluble Copper Phthalocyanine Complex

Terao, R., Nakazono, T., Parent, A. R. & Sakai, K., Oct 1 2016, In : ChemPlusChem. 81, 10, p. 1064-1067 4 p.

Research output: Contribution to journal › Article

Chlorides
Oxidation
Water
Hydroxyl Radical
Copper
7 Citations (Scopus)

Tris(2,2′-bipyridine)ruthenium Derivatives with Multiple Viologen Acceptors: Quadratic Dependence of Photocatalytic H2Evolution Rate on the Local Concentration of the Acceptor Site

Kitamoto, K. & Sakai, K., Jan 1 2016, In : Chemistry - A European Journal. 22, 35, p. 12381-12390 10 p.

Research output: Contribution to journal › Article

Viologens
Ruthenium
Separators
Derivatives
Electrons
2015
9 Citations (Scopus)

A tricarboxylated PtCl(terpyridine) derivative exhibiting pH-dependent photocatalytic activity for H2 evolution from water

Yamauchi, K. & Sakai, K., May 14 2015, In : Dalton Transactions. 44, 18, p. 8685-8696 12 p.

Research output: Contribution to journal › Article

Edetic Acid
Derivatives
Electrons
Water
Ligands
37 Citations (Scopus)

Improving singlet oxygen resistance during photochemical water oxidation by cobalt porphyrin catalysts

Nakazono, T., Parent, A. R. & Sakai, K., Apr 27 2015, In : Chemistry - A European Journal. 21, 18, p. 6723-6726 4 p.

Research output: Contribution to journal › Article

Singlet Oxygen
Porphyrins
Cobalt
Oxidation
Catalysts
29 Citations (Scopus)

Oxygen Evolution Catalyzed by a Mononuclear Ruthenium Complex Bearing Pendant SO3- Groups

Yoshida, M., Kondo, M., Torii, S., Sakai, K. & Masaoka, S., Jun 1 2015, In : Angewandte Chemie - International Edition. 54, 27, p. 7981-7984 4 p.

Research output: Contribution to journal › Article

Bearings (structural)
Ruthenium
Oxygen
Catalysts
Oxidation
10 Citations (Scopus)

Pt(II)-Catalyzed photosynthesis for H2 evolution cycling between singly and triply reduced species

Yamamoto, K., Kitamoto, K., Yamauchi, K. & Sakai, K., Aug 4 2015, In : Chemical Communications. 51, 77, p. 14516-14519 4 p.

Research output: Contribution to journal › Article

Photosynthesis
Electrons
Viologens
Derivatives
2014
32 Citations (Scopus)

A cobalt-NHC complex as an improved catalyst for photochemical hydrogen evolution from water

Kawano, K., Yamauchi, K. & Sakai, K., Sep 7 2014, In : Chemical Communications. 50, 69, p. 9872-9875 4 p.

Research output: Contribution to journal › Article

Cobalt
Hydrogen
Catalysts
Water
carbene
5 Citations (Scopus)

Hydrogen-bonded frameworks of propylenediamine-N,N′-diacetic acid Pt(II) complexes, synthesis, structural characterization, and antitumor activity

El-Ghamry, H. A., Masaoka, S. & Sakai, K., Mar 19 2014, In : Journal of Coordination Chemistry. 67, 6, p. 943-955 13 p.

Research output: Contribution to journal › Article

cultured cells
Hydrogen
Cells
acids
Acids
37 Citations (Scopus)

Mechanism of water oxidation by non-heme iron catalysts when driven with sodium periodate

Parent, A. R., Nakazono, T., Lin, S., Utsunomiya, S. & Sakai, K., Sep 7 2014, In : Dalton Transactions. 43, 33, p. 12501-12513 13 p.

Research output: Contribution to journal › Article

Iron
Oxidation
Catalysts
Water
Amines
33 Citations (Scopus)

Mechanistic studies of photoinduced intramolecular and intermolecular electron transfer processes in RuPt-centred photo-hydrogen-evolving molecular devices

Suneesh, C. V., Balan, B., Ozawa, H., Nakamura, Y., Katayama, T., Muramatsu, M., Nagasawa, Y., Miyasaka, H. & Sakai, K., Jan 28 2014, In : Physical Chemistry Chemical Physics. 16, 4, p. 1607-1616 10 p.

Research output: Contribution to journal › Article

Hydrogen
electron transfer
Electrons
hydrogen
ethylenediaminetetraacetic acids
27 Citations (Scopus)

Pigment-acceptor-catalyst triads for photochemical hydrogen evolution

Kitamoto, K. & Sakai, K., Apr 25 2014, In : Angewandte Chemie - International Edition. 53, 18, p. 4618-4622 5 p.

Research output: Contribution to journal › Article

Pigments
Photosynthesis
Hydrogen
Catalysts
Electrons
25 Citations (Scopus)

Synthesis and characterization of Cu(II), Co(II) and Ni(II) complexes of a number of sulfadrug azodyes and their application for wastewater treatment

El-Baradie, K., El-Sharkawy, R., El-Ghamry, H. & Sakai, K., Jan 1 2014, In : Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy. 121, p. 180-187 8 p.

Research output: Contribution to journal › Article

Wastewater treatment
Ligands
ligands
synthesis
dyes
11 Citations (Scopus)

Three Distinct Redox States of an Oxo-Bridged Dinuclear Ruthenium Complex

Yoshida, M., Kondo, M., Nakamura, T., Sakai, K. & Masaoka, S., Oct 1 2014, In : Angewandte Chemie - International Edition. 53, 43, p. 11519-11523 5 p.

Research output: Contribution to journal › Article

Ruthenium
X ray crystallography
Electronic states
Electronic structure
Paramagnetic resonance
23 Citations (Scopus)

Tuning of metal-metal interactions in mixed-valence states of cyclometalated dinuclear ruthenium and osmium complexes bearing tetrapyridylpyrazine or-benzene

Nagashima, T., Nakabayashi, T., Suzuki, T., Kanaizuka, K., Ozawa, H., Zhong, Y. W., Masaoka, S., Sakai, K. & Haga, M. A., Sep 22 2014, In : Organometallics. 33, 18, p. 4893-4904 12 p.

Research output: Contribution to journal › Article

Bearings (structural)
Osmium
Ruthenium
osmium
Benzene
2013
137 Citations (Scopus)

Cobalt porphyrins as homogeneous catalysts for water oxidation

Nakazono, T., Parent, A. R. & Sakai, K., Jul 21 2013, In : Chemical Communications. 49, 57, p. 6325-6327 3 p.

Research output: Contribution to journal › Article

Porphyrins
Cobalt
Oxidation
Catalysts
Water
14 Citations (Scopus)

Heterobimetallic coordination polymers based on the [Pt(SCN) 4]2- and [Pt(SeCN)4]2- building blocks

Kobayashi, M., Savard, D., Geisheimer, A. R., Sakai, K. & Leznoff, D. B., May 6 2013, In : Inorganic chemistry. 52, 9, p. 4842-4852 11 p.

Research output: Contribution to journal › Article

ethylenediamine
coordination polymers
Polymers
Metals
Ligands
43 Citations (Scopus)

Highly efficient photocatalytic water reduction with robust iridium(III) photosensitizers containing arylsilyl substituents

Whang, D. R., Sakai, K. & Park, S. Y., Oct 25 2013, In : Angewandte Chemie - International Edition. 52, 44, p. 11612-11615 4 p.

Research output: Contribution to journal › Article

Iridium
Photosensitizing Agents
Photosensitizers
Water
Ligands
17 Citations (Scopus)

Synthesis and structure revision of the C43-C67 part of amphidinol 3

Ebine, M., Kanemoto, M., Manabe, Y., Konno, Y., Sakai, K., Matsumori, N., Murata, M. & Oishi, T., Jun 26 2013, In : Organic Letters. 15, 11, p. 2846-2849 4 p.

Research output: Contribution to journal › Article

nuclear magnetic resonance
oxidation
synthesis
configurations
Nuclear magnetic resonance
2012
16 Citations (Scopus)

A mononuclear ruthenium complex showing multiple proton-coupled electron transfer toward multi-electron transfer reactions

Okamura, M., Yoshida, M., Kuga, R., Sakai, K., Kondo, M. & Masaoka, S., Nov 14 2012, In : Dalton Transactions. 41, 42, p. 13081-13089 9 p.

Research output: Contribution to journal › Article

Ruthenium
Protons
Electrons
Oxidation
Density functional theory
74 Citations (Scopus)

Kinetics and DFT studies on water oxidation by Ce4+ catalyzed by [Ru(terpy)(bpy)(OH2)]2+

Kimoto, A., Yamauchi, K., Yoshida, M., Masaoka, S. & Sakai, K., Jan 7 2012, In : Chemical Communications. 48, 2, p. 239-241 3 p.

Research output: Contribution to journal › Article

Discrete Fourier transforms
Oxidation
Kinetics
Water