A04 Takahiko Kojima
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Takahiko Kojima |
Participating A04 |  |
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Affiliation |
Faculty of Pure and Applied Sciences, Department of Chemistry, University of Tsukuba |
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Position |
Professor |
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Contact |
kojima@chem.tsukuba.ac.jp |
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HP |
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Research Project |
Development of Metal-Complex Catalysts with Helical Chirality and the Application to Asymmetric Oxidation Reactions |
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Abstract |
Asymmetric oxidation reactions have been developed using metal complexes, which have ligands with stereogenic carbon atom(s) or axial chirality, as catalyst. In this study, we will develop asymmetric oxidation reactions using transition-metal complexes with helical chirality around the metal centers without any stereogenic centers in the ligands. Toward this goal, we will employ non-chiral pyridylamine ligands with bulky aromatic substituents via amide linkage. By virtue of the stability of the Ru(II) complexes with such ligands accompanying amide-oxygen coordination and intramolecular hydrogen bonding, we expect the formation of “metallo-helicene” species with helical chirality around the metal center to perform asymmetric oxidation of organic substrates on the basis of the formation of a Ru(IV)-oxo complex as the responsible intermediate of the reactions.
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Research Areas |
Cluster Chemistry, Nanomaterial Chemistry, Inorganic Chemistry |
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Keywords |
Metal Cluster, High-Resolution Separation, Asymmetric Catalytic Activity |
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2020
[28] Electron Microscopic Observation of an Icosahedral Au13 Core in Au25(SePh)18 and Reversible Isomerization between Icosahedral and Face-Centered Cubic Cores in Au144(SC2H4Ph)60,
Ryo Takahata; Seiji Yamazoe; Yosuke Maehara; Kenji Yamazaki; Shinjiro Takano; WataruKurashige; Yuichi Negishi; Kazutoshi Gohara; Tatsuya Tsukuda, J. Phys. Chem. C, 124, 12, 6907 - 6912, 2020
DOI: 10.1021/acs.jpcc.9b11412.
Ryo Takahata; Seiji Yamazoe; Yosuke Maehara; Kenji Yamazaki; Shinjiro Takano; WataruKurashige; Yuichi Negishi; Kazutoshi Gohara; Tatsuya Tsukuda, J. Phys. Chem. C, 124, 12, 6907 - 6912, 2020
DOI: 10.1021/acs.jpcc.9b11412.
[27] Atomic-level Separation of Thiolate-protected Metal Clusters,
Yuichi Negishi; Sayaka Hashimoto; Ayano Ebina; Kota Hamada; Sakiat Hossain; Tokuhisa Kawawaki, Nanoscale, 12, 8017 - 8039, 2020
DOI: 10.1039/D0NR00824A.
Yuichi Negishi; Sayaka Hashimoto; Ayano Ebina; Kota Hamada; Sakiat Hossain; Tokuhisa Kawawaki, Nanoscale, 12, 8017 - 8039, 2020
DOI: 10.1039/D0NR00824A.
[26] Activation of Water-Splitting Photocatalysts by Loading with Ultrafine Rh-Cr Mixed-Oxide Cocatalyst Nanoparticles,
Wataru Kurashige; Yutaro Mori; Shuhei Ozaki ; Masanobu Kawachi ; Sakiat Hossain; Tokuhisa Kawawaki; Cameron J. Shearer; Akihide Iwase; Gregory F. Metha; Seiji Yamazoe; Akihiko Kudo; Yuichi Negishi, Angew. Chem. Int. Ed., 59, 7076 - 7082, 2020
DOI: 10.1002/anie.201916681.
Wataru Kurashige; Yutaro Mori; Shuhei Ozaki ; Masanobu Kawachi ; Sakiat Hossain; Tokuhisa Kawawaki; Cameron J. Shearer; Akihide Iwase; Gregory F. Metha; Seiji Yamazoe; Akihiko Kudo; Yuichi Negishi, Angew. Chem. Int. Ed., 59, 7076 - 7082, 2020
DOI: 10.1002/anie.201916681.
[25] Understanding and Designing One-Dimensional Assemblies of Ligand-Protected Metal Nanoclusters,
Sakiat Hossain; Yukari Imai; Yuichi Motohashi; Zhaoheng Chen; Daiki Suzuki; Taiyo Suzuki; Yuki Kataoka; Momoko Hirata; Tasuku Ono; Wataru Kurashige; Tokuhisa Kawawaki; Takahiro Yamamoto; Yuichi Negishi, Mater.Horizon, 7, 796 - 803, 2020
DOI: 10.1039/C9MH01691K.
Sakiat Hossain; Yukari Imai; Yuichi Motohashi; Zhaoheng Chen; Daiki Suzuki; Taiyo Suzuki; Yuki Kataoka; Momoko Hirata; Tasuku Ono; Wataru Kurashige; Tokuhisa Kawawaki; Takahiro Yamamoto; Yuichi Negishi, Mater.Horizon, 7, 796 - 803, 2020
DOI: 10.1039/C9MH01691K.
[24] γ-Alumina-Supported Pt17 Cluster: Controlled Loading, Geometrical Structure, and Size-Specific Catalytic Activity for Carbon Monoxide and Propylene Oxidation,
Yuichi Negishi; Nobuyuki Shimizu; Kanako Funai; Ryo Kaneko; Kosuke Wakamatsu; Atsuya Harasawa; Sakiat Hossain; Manfred E. Schuster; Dogan Ozkaya; Wataru Kurashige; Tokuhisa Kawawaki; Seiji Yamazoe; Shuhei Nagaoka, Nanoscale Adv, 2, 669 - 678, 2020
DOI: 10.1039/C9NA00579J.
Yuichi Negishi; Nobuyuki Shimizu; Kanako Funai; Ryo Kaneko; Kosuke Wakamatsu; Atsuya Harasawa; Sakiat Hossain; Manfred E. Schuster; Dogan Ozkaya; Wataru Kurashige; Tokuhisa Kawawaki; Seiji Yamazoe; Shuhei Nagaoka, Nanoscale Adv, 2, 669 - 678, 2020
DOI: 10.1039/C9NA00579J.
[23] Gold Nanoclusters as Electrocatalysts for Energy Conversion,
Tokuhisa Kawawaki; Yuichi Negishi, Nanomaterials, 10, 238 - 238, 2020
DOI: 10.3390/nano10020238 .
Tokuhisa Kawawaki; Yuichi Negishi, Nanomaterials, 10, 238 - 238, 2020
DOI: 10.3390/nano10020238 .
[22] Photo/electrocatalysis and Photosensitization Using Metal Nanoclusters for Green Energy and Medical Applications,
Tokuhisa Kawawaki; Yuichi Negishi; Hideya Kawasaki, Nanoscale Adv, 2, 17 - 36, 2020
DOI: 10.1039/C9NA00583H.
Tokuhisa Kawawaki; Yuichi Negishi; Hideya Kawasaki, Nanoscale Adv, 2, 17 - 36, 2020
DOI: 10.1039/C9NA00583H.
[21] Vibrational Spectra of Thiolate-Protected Gold Nanocluster with Infrared Reflection Absorption Spectroscopy: Size- and Temperature-Dependent Ordering Behavior of Organic Monolayer,
Takaho Yokoyama; Naoyuki Hirata; Hironori Tsunoyama; Toyoaki Eguchi; Yuichi Negishi; Atsushi Nakajima, J. Mater. Chem. C, 124, 1, 363 - 371, 2020
DOI: 10.1021/acs.jpcc.9b07550.
Takaho Yokoyama; Naoyuki Hirata; Hironori Tsunoyama; Toyoaki Eguchi; Yuichi Negishi; Atsushi Nakajima, J. Mater. Chem. C, 124, 1, 363 - 371, 2020
DOI: 10.1021/acs.jpcc.9b07550.
2019
[20] Elucidating Ligand Effects in Thiolate-Protected Metal Clusters Using Au24Pt(TBBT)18 as A Model Cluster,
Sakiat Hossain; Yukari Imai; Daiki Suzuki; Woojun Choi; Zhaoheng Chen; Taiyo Suzuki; Mahiro Yoshioka; Tokuhisa Kawawaki; Dongil Lee; Yuichi Negishi, Nanoscale, 11, 22089 - 22098, 2019
DOI: 10.1039/C9NR07117B.
Sakiat Hossain; Yukari Imai; Daiki Suzuki; Woojun Choi; Zhaoheng Chen; Taiyo Suzuki; Mahiro Yoshioka; Tokuhisa Kawawaki; Dongil Lee; Yuichi Negishi, Nanoscale, 11, 22089 - 22098, 2019
DOI: 10.1039/C9NR07117B.
[19] Precise Synthesis of Platinum and Alloy Clusters and Elucidation of Their Structures,
Sakiat Hossain; Yukari Imai; Yuichi Negishi, AIP Conf.Proc, 2186, 030018 - 030018, 2019.
Sakiat Hossain; Yukari Imai; Yuichi Negishi, AIP Conf.Proc, 2186, 030018 - 030018, 2019.
[18] Atomic-Level Understanding of Effect of Heteroatom Doping of the Cocatalyst on Water-Splitting Activity in AuPd or AuPt Alloy Cluster-Loaded BaLa4Ti4O15,
Wataru Kurashige; Rui Hayashi; Kosuke Wakamatsu; Yuki Kataoka; Sakiat Hossain; Akihide Iwase; Akihiko Kudo; Seiji Yamazoe; Yuichi Negishi, ACS Appl.Energy Mater, 2, 6, 4175 - 4187, 2019
DOI: 10.1021/acsaem.9b00426.
Wataru Kurashige; Rui Hayashi; Kosuke Wakamatsu; Yuki Kataoka; Sakiat Hossain; Akihide Iwase; Akihiko Kudo; Seiji Yamazoe; Yuichi Negishi, ACS Appl.Energy Mater, 2, 6, 4175 - 4187, 2019
DOI: 10.1021/acsaem.9b00426.
[17] Dynamic Behavior of Thiolate-Protected Gold?Silver 38-Atom Alloy Clusters in Solution,
Yoshiki Niihori; Sayaka Hashimoto; Yuki Koyama; Sakiat Hossain; Wataru Kurashige; Yuichi Negishi, J. Phys. Chem. C, 123, 13324 - 13329, 2019
DOI: 10.1021/acs.jpcc.9b02644.
Yoshiki Niihori; Sayaka Hashimoto; Yuki Koyama; Sakiat Hossain; Wataru Kurashige; Yuichi Negishi, J. Phys. Chem. C, 123, 13324 - 13329, 2019
DOI: 10.1021/acs.jpcc.9b02644.
[16] Carbon-nanotube-based Photocatalysts for Water Splitting in Cooperation with BiVO4 and [Co(bpy)3]3+/2+,
Takumi Izawa; Vit Kalousek; Daiki Miyamoto; Noritake Murakami; Hideaki Miyake; Tomoyuki Tajima; Wataru Kurashige; Yuichi Negishi; Keita Ikeue; Takahiro Ohkubo; Yutaka Takaguchi, Chem. Lett., 48, 5, 410 - 413, 2019
DOI: 10.1246/cl.180999.
Takumi Izawa; Vit Kalousek; Daiki Miyamoto; Noritake Murakami; Hideaki Miyake; Tomoyuki Tajima; Wataru Kurashige; Yuichi Negishi; Keita Ikeue; Takahiro Ohkubo; Yutaka Takaguchi, Chem. Lett., 48, 5, 410 - 413, 2019
DOI: 10.1246/cl.180999.
[15] Deepening the Understanding on Thiolate-Protected Metal Clusters Using High-Performance Liquid Chromatography,
Yoshiki Niihori; Kana Yoshida; Sakiat Hossain; Wataru Kurashige; Yuichi Negishi, Bull. Chem. Soc. Jpn., 92, 3, 664 - 695, 2019
DOI: 10.1246/bcsj.20180357.
Yoshiki Niihori; Kana Yoshida; Sakiat Hossain; Wataru Kurashige; Yuichi Negishi, Bull. Chem. Soc. Jpn., 92, 3, 664 - 695, 2019
DOI: 10.1246/bcsj.20180357.
2018
[14] Alloy Clusters: Precise Synthesis and Mixing Effects,
Sakiat Hossain; Yoshiki Niihori; Lakshmi V. Nair; Bharat Kumar; Wataru Kurashige; Yuichi Negishi, Acc. Chem. Res., 51, 12, 3114 - 3124, 2018
DOI: 10.1021/acs.accounts.8b00453.
Sakiat Hossain; Yoshiki Niihori; Lakshmi V. Nair; Bharat Kumar; Wataru Kurashige; Yuichi Negishi, Acc. Chem. Res., 51, 12, 3114 - 3124, 2018
DOI: 10.1021/acs.accounts.8b00453.
[13] Hetero-Biicosahedral [Au24Pd(PPh3)10(SC2H4Ph)5Cl2]+ Nanocluster: Selective Synthesis and Optical and Electrochemical Properties,
Lakshmi V. Nair; Sakiat Hossain; Shunjiro Takagi; Yukari Imai; Guoxiang Hu; Shota Wakayama; Bharat Kumar; Wataru Kurashige; De-en Jiang; Yuichi Negishi, Nanoscale, 10, 18969 - 18979, 2018
DOI: 10.1039/C8NR04078H.
Lakshmi V. Nair; Sakiat Hossain; Shunjiro Takagi; Yukari Imai; Guoxiang Hu; Shota Wakayama; Bharat Kumar; Wataru Kurashige; De-en Jiang; Yuichi Negishi, Nanoscale, 10, 18969 - 18979, 2018
DOI: 10.1039/C8NR04078H.
[12] Atomic and Isomeric Separation of Thiolate-Protected Alloy Clusters,
Yoshiki Niihori; Yuki Koyama; Seiichiro Watanabe; Sayaka Hashimoto; Sakiat Hossain; Lakshmi V. Nair; Bharat Kumar; Wataru Kurashige; Yuichi Negishi, J. Phys. Chem. Lett., 9, 17, 4930 - 4934, 2018
DOI: 10.1021/acs.jpclett.8b02211.
Yoshiki Niihori; Yuki Koyama; Seiichiro Watanabe; Sayaka Hashimoto; Sakiat Hossain; Lakshmi V. Nair; Bharat Kumar; Wataru Kurashige; Yuichi Negishi, J. Phys. Chem. Lett., 9, 17, 4930 - 4934, 2018
DOI: 10.1021/acs.jpclett.8b02211.
[11] Synthesis and Characterization of Metal-Diaminobipyridine Complexes as Low-Cost Co-catalysts for Photo-Sensitized Hydrogen Evolution,
TarunChand Vagvala; Takashi Ooyabe; Munetoshi Sakai; Yusuke Funasako; Makoto Inokuchi; WataruKurashige; Yuichi Negishi; Vit Kalousek; Keita Ikeue, Inorg. Chim. Acta, 482, 821 - 829, 2018
DOI: 10.1016/j.ica.2018.07.022.
TarunChand Vagvala; Takashi Ooyabe; Munetoshi Sakai; Yusuke Funasako; Makoto Inokuchi; WataruKurashige; Yuichi Negishi; Vit Kalousek; Keita Ikeue, Inorg. Chim. Acta, 482, 821 - 829, 2018
DOI: 10.1016/j.ica.2018.07.022.
[10] An Au25(SR)18 Cluster with a Face-Centered Cubic Core,
Tsubasa Omoda; Shinjiro Takano; Seiji Yamazoe; Kiichirou Koyasu; Yuichi Negishi; Tatsuya Tsukuda, J. Phys. Chem. C, 122, 24, 13199 - 13204, 2018
DOI: 10.1021/acs.jpcc.8b03841.
Tsubasa Omoda; Shinjiro Takano; Seiji Yamazoe; Kiichirou Koyasu; Yuichi Negishi; Tatsuya Tsukuda, J. Phys. Chem. C, 122, 24, 13199 - 13204, 2018
DOI: 10.1021/acs.jpcc.8b03841.
[9] Au25-Loaded BaLa4Ti4O15 Water-Splitting Photocatalyst with Enhanced Activity and Durability Produced Using New Chromium Oxide Shell Formation Method,
Wataru Kurashige; Rina Kumazawa; Daiki Ishii; Rui Hayashi; Yoshiki Niihori; Sakiat Hossain; Lakshmi V. Nair; Tomoaki Takayama; Akihide Iwase; Seiji Yamazoe; Tatsuya Tsukuda; Akihiko Kudo; Yuichi Negishi, J. Phys. Chem. C, 122, 25, 13669 - 13681, 2018
DOI: 10.1021/acs.jpcc.8b00151.
Wataru Kurashige; Rina Kumazawa; Daiki Ishii; Rui Hayashi; Yoshiki Niihori; Sakiat Hossain; Lakshmi V. Nair; Tomoaki Takayama; Akihide Iwase; Seiji Yamazoe; Tatsuya Tsukuda; Akihiko Kudo; Yuichi Negishi, J. Phys. Chem. C, 122, 25, 13669 - 13681, 2018
DOI: 10.1021/acs.jpcc.8b00151.
[8] Characterization of Floating-gate Memory Device with Thiolate-Protected Gold and Gold-Palladium Nanoclusters,
Takaho Yokoyama; Naoyuki Hirata; Hironori Tsunoyama; Yuichi Negishi; Atsushi Nakajima1, API Adv, 8, 065002, 2018
DOI: 10.1063/1.5025509.
Takaho Yokoyama; Naoyuki Hirata; Hironori Tsunoyama; Yuichi Negishi; Atsushi Nakajima1, API Adv, 8, 065002, 2018
DOI: 10.1063/1.5025509.
[7] Thiolate-Protected Trimetallic Au~20Ag~4Pd and Au~20Ag~4Pt Alloy Clusters with Controlled Chemical Composition and Metal Positions,
Sakiat Hossain; Tasuku Ono; Mahiro Yoshioka; Guoxiang Hu; Mai Hosoi; Zhaoheng Chen; Yoshiki Niihori; Wataru Kurashige; De-en Jiang; Yuichi Negishi, J. Phys. Chem. Lett., 9, 2590 - 2594, 2018
DOI: 10.1021/acs.jpclett.8b00910.
Sakiat Hossain; Tasuku Ono; Mahiro Yoshioka; Guoxiang Hu; Mai Hosoi; Zhaoheng Chen; Yoshiki Niihori; Wataru Kurashige; De-en Jiang; Yuichi Negishi, J. Phys. Chem. Lett., 9, 2590 - 2594, 2018
DOI: 10.1021/acs.jpclett.8b00910.
[6] Evolution of Silver Mediated Enhanced Fluorescent Au-Ag Nanocluster under UVActivation: A Platform for Sensing,
Jayasmita Jana; Paribesh Acharyya; Yuichi Negishi; Tarasankar Pal, ACS Omega, 3, 3463 - 3470, 2018
DOI: 10.1021/acsomega.8b00145.
Jayasmita Jana; Paribesh Acharyya; Yuichi Negishi; Tarasankar Pal, ACS Omega, 3, 3463 - 3470, 2018
DOI: 10.1021/acsomega.8b00145.
[5] Photo-induced H2 Evolution from Water via the Dissociation of Excitons in Water-Dispersible Single-Walled Carbon Nanotube Sensitizers,
Kango Ishimoto; Tomoyuki Tajima; Hideaki Miyake; Masahiro Yamagami; Wataru Kurashige; Yuichi Negishi; Yutaka Takaguchi, Chem. Commun., 54, 393 - 396, 2018
DOI: 10.1039/c7cc07194a.
Kango Ishimoto; Tomoyuki Tajima; Hideaki Miyake; Masahiro Yamagami; Wataru Kurashige; Yuichi Negishi; Yutaka Takaguchi, Chem. Commun., 54, 393 - 396, 2018
DOI: 10.1039/c7cc07194a.
2017
[4] Perspective: Exchange Reactions in Thiolate-Protected Metal Clusters,
Yoshiki Nihori; Sakiat Hossain; Bharat Kumar; Lakshmi V Nair; Wataru Kurashige; Yuichi Negishi, APL Materials, 5, 5, 53201 - 53201, 2017
DOI: 10.1063/1.4978373.
Yoshiki Nihori; Sakiat Hossain; Bharat Kumar; Lakshmi V Nair; Wataru Kurashige; Yuichi Negishi, APL Materials, 5, 5, 53201 - 53201, 2017
DOI: 10.1063/1.4978373.
[3] Fabrication and Characterization of Floating Memory Devices Based on Thiolate-Protected Gold Nanoclusters,
Naoyuki Hirata; Minako Sato; Eika Tsunemi; Yoshio Watanabe; Hironori Tsunoyama; Masato Nakaya; Toyoaki Eguchi; Yuichi Negishi; Atsushi Nakajima, J. Phys. Chem. C, 121, 10638 - 10644, 2017
DOI: 10.1021/acs.jpcc.6b09339.
Naoyuki Hirata; Minako Sato; Eika Tsunemi; Yoshio Watanabe; Hironori Tsunoyama; Masato Nakaya; Toyoaki Eguchi; Yuichi Negishi; Atsushi Nakajima, J. Phys. Chem. C, 121, 10638 - 10644, 2017
DOI: 10.1021/acs.jpcc.6b09339.
[2] [Pt17(CO)12(PPh3)8]n+ (n = 1, 2): Synthesis and Geometric and Electronic Structures,
Lakshmi V Nair; Sakiat Hossain; Shota Wakayama; Shunjiro Takagi; Mahiro Yoshioka; Juri Maekawa; Atsuya Harasawa; Bharat Kumar; Yoshiki Nihori; Wataru Kurashige; Yuichi Negishi, J. Phys. Chem. C, 121, 11002 - 11009, 2017
DOI: 10.1021/acs.jpcc.7b00978.
Lakshmi V Nair; Sakiat Hossain; Shota Wakayama; Shunjiro Takagi; Mahiro Yoshioka; Juri Maekawa; Atsuya Harasawa; Bharat Kumar; Yoshiki Nihori; Wataru Kurashige; Yuichi Negishi, J. Phys. Chem. C, 121, 11002 - 11009, 2017
DOI: 10.1021/acs.jpcc.7b00978.
[1] Monodisperse Iridium Clusters Protected by Phenylacetylene: Implication for Size-Dependent Evolution of Binding Sites,
Hiroki Yamamoto; Prasenjit Maity; Ryo Takahata; Seiji Yamazoe; Kiichirou Koyasu; Wataru Kurashige; Yuichi Negishi; Tatsuya Tsukuda, J. Phys. Chem. C, 121, 10936 - 10941, 2017
DOI: 10.1021/acs.jpcc.6b12121.
Hiroki Yamamoto; Prasenjit Maity; Ryo Takahata; Seiji Yamazoe; Kiichirou Koyasu; Wataru Kurashige; Yuichi Negishi; Tatsuya Tsukuda, J. Phys. Chem. C, 121, 10936 - 10941, 2017
DOI: 10.1021/acs.jpcc.6b12121.