Development of efficient photocatalytic systems for CO2 reduction using mononuclear and multinuclear metal complexes based on mechanistic studies, Hiroyuki Takeda, Osamu Ishitani, Yes, No, No, 01 Feb. 2010, Coordination Chemistry Reviews, 254, 346, 354, Scientific journal

Photocatalytic reduction of CO2 using metal complexes, Yasuomi Yamazaki, Hiroyuki Takeda, Osamu Ishitani, No, No, No, 01 Dec. 2015, Journal of Photochemistry and Photobiology C: Photochemistry Reviews, 25, 106, 137, Scientific journal

Development of a Highly Durable Photocatalytic CO2 Reduction Using a Mn-Complex Catalyst: Application of Selective Photosplitting of a Mn(0)–Mn(0) Bond, Hiroki Koizumi, Yusuke Tamaki, Kei Kamogawa, Marco Nicaso, Yutaka Suzuki, Yasuomi Yamazaki, Hiroyuki Takeda, Osamu Ishitani, No, No, No, 10 Feb. 2025, Journal of the American Chemical Society, 147, 6236, 6248, Scientific journal

Photocatalytic CO2 Reduction Using Mixed Catalytic Systems Comprising an Iron Cation with Bulky Phenanthroline Ligands, Hiroyuki Takeda, Mina Irimajiri, Toshihide Mizutani, Shunsuke Nozawa, Yuna Matsuura, Masao Kurosu, Osamu Ishitani, Yes, No, Yes, 10 Apr. 2024, Inorganic Chemistry, 63, 16, 7343, 7355, Scientific journal

Heteroleptic Cu(I) Bipyridine Complexes as Redox Photosensitizers for Photocatalytic CO2 Reduction, Takeda, Hiroyuki;Takahashi, Kohei;Namiki, Yui;Ito, Akitaka;Kurosu, Masao;Muraoka, Takako;Asano, Motoko S., Yes, No, Yes, 2023, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 96, 6, 519, 528, Scientific journal

Structural change dynamics of heteroleptic Cu(i) complexes observed by ultrafast emission spectroscopy, Sanga, Masashi;Nakamura, Kosuke;Iwamura, Munetaka;Nozaki, Koichi;Takeda, Hiroyuki;Monma, Yu;Ishitani, Osamu, No, No, No, 2023, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 25, 23, 15873, 15884, Scientific journal

Recent developments of photoactive Cu(I) and Ag(I) complexes with diphosphine and related ligands, Takeda, Hiroyuki;Kobayashi, Atsushi;Tsuge, Kiyoshi, Yes, No, No, 2022, COORDINATION CHEMISTRY REVIEWS, 470, Scientific journal

Heteroleptic Cu(I) Phenanthroline Complexes Bearing Benzoxazole and Benzothiazole Moieties for Visible Light Absorption, Takeda Hiroyuki;Shimo Makoto;Yasuhara Gai;Kobori Ken;Asano Motoko S.;Amao Yutaka, Yes, No, Yes, Jan. 2022, Chemistry Letters, 51, 1, 69, 72, Scientific journal

Highly Functional Dinuclear Cu^I-Complex Photosensitizers for Photocatalytic CO₂ Reduction, Takeda, Hiroyuki;Monma, Yu;Ishitani, Osamu, Yes, No, Yes, 2021, ACS CATALYSIS, 11, 19, 11973, 11984, Scientific journal

A Ru(II)–Mn(I) Supramolecular Photocatalyst for CO2 Reduction, David C. Fabry, Hiroki Koizumi, Debashis Ghosh, Yasuomi Yamazaki, Hiroyuki Takeda, Yusuke Tamaki, Osamu Ishitani, No, Yes, No, 11 May 2020, Organometallics, 39, 9, 1511, 1518, Scientific journal

Development of Visible-Light Driven Cu(I) Complex Photosensitizers for Photocatalytic CO2 Reduction, Hiroyuki Takeda, Yu Monma, Haruki Sugiyama, Hidehiro Uekusa, Osamu Ishitani, Yes, No, Yes, Jun. 2019, Frontiers in Chemistry, 7, 418, International conference proceedings

A new supramolecular photocatalyst with a Rh(III)-complex catalyst unit for CO2 reduction, Debashis Ghosh, Hiroyuki Takeda, David, C. Fabry, Yusuke Tamaki, Osamu Ishitani, No, No, No, Jan. 2019, ACS Sustainable Chemistry & Engineering, 7, 2, 2648, 2657, Scientific journal

Highly Efficient and Robust Photocatalytic Systems for CO2 Reduction Consisting of a Cu(I) Photosensitizer and Mn(I) Catalysts, Hiroyuki Takeda, Hiroko Kamiyama, Kouhei Okamoto, Mina Irimajiri, Toshihide Mizutani, Kazuhide Koike, Akiko Sekine, Osamu Ishitani, Yes, No, No, Dec. 2018, Journal of the American Chemical Society, 140, 49, 17241, 17254, Scientific journal

Electrons, Photons, Protons and Earth-Abundant Metal Complexes for Molecular Catalysis of CO2 Reduction, Hiroyuki Takeda, Claudio Cometto, Osamu Ishitani, Marc Robert, Yes, No, No, Jan. 2017, ACS CATALYSIS, 7, 1, 70, 88, Scientific journal

An Effective Synthetic Process for Pt-ZnO Composite and PtZn Alloy Using Spherical Coordination Polymer Particles as Precursors, Hitoshi Kumagai, Yoshiyuki Sakamoto, Hiroyuki Takeda, Shinichi Matsunaga, Masaaki Ohba, Shinji Inagaki, No, No, No, Aug. 2017, CHEMISTRY LETTERS, 46, 8, 1112, 1115, Scientific journal

Photocatalytic CO2 Reduction Using Cu(I) Photosensitizers with a Fe(II) Catalyst, Hiroyuki Takeda, Kenji Ohashi, Akiko Sekine, Osamu Ishitani, Yes, No, No, Apr. 2016, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 138, 13, 4354, 4357, Scientific journal

A Versatile Solid Photosensitizer: Periodic Mesoporous Organosilicas with Ruthenium Tris(bipyridine) Complexes Embedded in the Pore Walls, Hiroyuki Takeda, Masataka Ohashi, Yasutomo Goto, Tetsu Ohsuna, Takao Tani, Shinji Inagaki, Yes, No, No, Jul. 2016, ADVANCED FUNCTIONAL MATERIALS, 26, 28, 5068, 5077, Scientific journal

Ru(II)–Re(I) Binuclear Photocatalysts Connected by –CH2XCH2– (X = O, S, CH2) for CO2 Reduction, Eishiro Kato, Hiroyuki Takeda, Kazuhide Koike, Kei Ohkubo, Osamu Ishitani, No, No, No, 2015, Chemical Science, 6, 5, 3003, 3012, Scientific journal

Synthesis and strong photooxidation power of a supramolecular hybrid comprising a polyoxometalate and Ru(II) polypyridyl complex with zinc(II), Kenji Ohashi, Hiroyuki Takeda, Kazuhide Koike, Osamu Ishitani, No, No, No, 2015, FARADAY DISCUSSIONS, 185, 171, 185

A Visible-Light Harvesting System for CO2 Reduction Using a Ru-II-Re-I Photocatalyst Adsorbed in Mesoporous Organosilica, Yutaro Ueda, Hiroyuki Takeda, Tatsuto Yui, Kazuhide Koike, Yasutomo Goto, Shinji Inagaki, Osamu Ishitani, No, No, No, Feb. 2015, CHEMSUSCHEM, 8, 3, 439, 442, Scientific journal

Photocatalytic CO2 reduction using a Mn complex as a catalyst, Hiroyuki Takeda, Hiroki Koizumi, Kouhei Okamoto, Osamu Ishitani, Yes, No, No, 2014, CHEMICAL COMMUNICATIONS, 50, 12, 1491, 1493, Scientific journal

Photochemical Reduction of CO2 with Red Light Using Synthetic Chlorophyll-Rhenium Bipyridine Dyad, Yuichi Kitagawa, Hiroyuki Takeda, Kenji Ohashi, Tsuyoshi Asatani, Daisuke Kosumi, Hideki Hashimoto, Osamu Ishitani, Hitoshi Tamiaki, No, No, No, Aug. 2014, CHEMISTRY LETTERS, 43, 8, 1383, 1385

Efficient light harvesting via sequential two-step energy accumulation using a Ru-Re-5 multinuclear complex incorporated into periodic mesoporous organosilica, Youhei Yamamoto, Hiroyuki Takeda, Tatsuto Yui, Yutaro Ueda, Kazuhide Koike, Shinji Inagaki, Osamu Ishitani, No, No, No, 2014, CHEMICAL SCIENCE, 5, 2, 639, 648, Scientific journal

Ring-Shaped Rhenium(I) Multinuclear Complexes: Improved Synthesis and Photoinduced Multielectron Accumulation, Tsuyoshi Asatani, Yuki Nakagawa, Yusuke Funada, Shuhei Sawa, Hiroyuki Takeda, Tatsuki Morimoto, Kazuhide Koike, Osamu Ishitani, No, No, No, Jul. 2014, INORGANIC CHEMISTRY, 53, 14, 7170, 7180

Hybridization between Periodic Mesoporous Organosilica and a Ru(II) Polypyridyl Complex with Phosphonic Acid Anchor Groups, Tatsuto Yui, Hiroyuki Takeda, Yutaro Ueda, Keita Sekizawa, Kazuhide Koike, Shinji Inagaki, Osamu Ishitani, No, No, No, Feb. 2014, ACS APPLIED MATERIALS & INTERFACES, 6, 3, 1992, 1998, Scientific journal

Light-Harvesting Photocatalysis for Water Oxidation Using Mesoporous Organosilica, Hiroyuki Takeda, Masataka Ohashi, Yasutomo Goto, Tetsu Ohsuna, Takao Tani, Shinji Inagaki, Yes, No, No, Jul. 2014, CHEMISTRY-A EUROPEAN JOURNAL, 20, 29, 9130, 9136, Scientific journal

PHOTOCHEMISTRY AND PHOTOCATALYSIS OF RHENIUM(I) DIIMINE COMPLEXES, Hiroyuki Takeda, Kazuhide Koike, Tatsuki Morimoto, Hiroki Inumaru, Osamu Ishitani, Yes, No, No, 2011, ADVANCES IN INORGANIC CHEMISTRY, VOL 63: INORGANIC PHOTOCHEMISTRY, 63, 137, 186, Scientific journal

Enhanced Photocatalysis of Rhenium(I) Complex by Light-Harvesting Periodic Mesoporous Organosilica, Hiroyuki Takeda, Masataka Ohashi, Takao Tani, Osamu Ishitani, Shinji Inagaki, Yes, No, No, May 2010, INORGANIC CHEMISTRY, 49, 10, 4554, 4559, Scientific journal

Visible-light-harvesting periodic mesoporous organosilica, Hiroyuki Takeda, Yasutomo Goto, Yoshifumi Maegawa, Tetsu Ohsuna, Takao Tani, Kazunori Matsumoto, Toyoshi Shimada, Shinji Inagaki, Yes, No, No, 2009, CHEMICAL COMMUNICATIONS, 40, 6032, 6034, Scientific journal

Development of an efficient photocatalytic system for CO2 reduction using rhenium(l) complexes based on mechanistic studies, Hiroyuki Takeda, Kazuhide Koike, Haruo Inoue, Osamu Ishitani, Yes, No, No, Feb. 2008, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 130, 6, 2023, 2031, Scientific journal

Photocatalytic reduction of CO2 using cis,trans-[Re(dmbpy)(CO)(2) (PR3)(PR'(3))](+) (dmbpy 4,4 '-dimethyl-2,2 '-bipyridine), Hideaki Tsubaki, Atsushi Sugawara, Hiroyuki Takeda, Bobak Gholamkhass, Kazuhide Koike, Osamu Ishitani, No, No, No, 2007, RESEARCH ON CHEMICAL INTERMEDIATES, 33, 1-2, 37, 48, Scientific journal

Analysis and isolation of cationic rhenium(I) and ruthenium(II) multinuclear complexes using size-exclusion chromatography, H Takeda, Y Yamamoto, C Nishiura, O Ishitani, Yes, No, No, Apr. 2006, ANALYTICAL SCIENCES, 22, 4, 545, 549, Scientific journal

Control of photochemical, photophysical, electrochemical, and photocatalytic properties of rhenium(I) complexes using intramolecular weak interactions between ligands, H Tsubaki, A Sekine, Y Ohashi, K Koike, H Takeda, O Ishitani, No, No, No, Nov. 2005, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 127, 44, 15544, 15555, Scientific journal

Development of Highly Efficient Photocatalytic Systems for CO2 Reduction Using Rhenium(I) Complexes on the Basis of Mechanistic Studies, Yes, Yes, Yes, Mar. 2006, Doctoral thesis

Yes, Yes, Yes, Master thesis

Contributor, Jan. 2022, 270, 125-139, Scholarly book

Contributor, Jul. 2020, 180-187, 9784781315102

Joint work, 10 Sep. 2019, 200, 9784254141054

Molecular Technology: Life Innovation, Contributor, Yusuke Tamaki, Hiroyuki Takeda, Osamu Ishitani, Chapter 9 Molecular Technologies for Photocatalytic CO2 Reduction, Wiley-VCH Verlag GmbH & Co. KGaA, 27 Feb. 2019, 209-249, Scholarly book

Contributor, Sep. 2015

Contributor, Jul. 2010

Contributor, Aug. 2009, 54-59, Others

17 Mar. 2026

17 Mar. 2026

06 Dec. 2025

06 Dec. 2025

Photocatalytic CO2 Reduction Using Mixed Catalytic Systems Comprising an Iron Cation with Bulky Phenanthroline Ligands, Hiroyuki Takeda, Mina Irimajiri, Toshihide Mizutani, Shunsuke Nozawa, Yuna Matsuura, Masao Kurosu, Kota Omiya, Tetsuo Okutsu, Osamu Ishitani, The 2025 International Chemical Congress of Pacific Basin Societies 2025 (PACIFICHEM2025), 06 Dec. 2025, English, International conference

Visible-Light Absorption of Heteroleptic Cu(I) Complexes Bearing 5-Membered Heteroaryls for Redox Photosensitizer, Hiroyuki Takeda, Taiga Fukui, Natsumi Hirosaka, Hiroki Okajima, Taiyo Kobayashi, Tetsuo Okutsu, 5th International Symposium on Photofunctional Chemistry of Complex Systems (ISPCCS2025), 13 Dec. 2025, English, International conference

15 Sep. 2025

20 Sep. 2024, 18 Sep. 2024, 20 Sep. 2024, Japanese, Japan, Domestic conference

Visible-Light Absorption of Heteroleptic Cu(I) Complexes Bearing 5-Membered Heteroaryls for Redox Photosensitizer, Hiroyuki Takeda, Natsumi Hirosaka, Taiyo Kobayashi, Motoko S. Asano, 24th International Conference on Photochemical Conversion and Storage of Solar Energy (IPS-24) / International Conference on Artificial Photosynthesis-2024 (ICARP2024), 29 Jul. 2024, 28 Jul. 2024, 02 Aug. 2024, English, Hiroshima, Japan, International conference

14 Dec. 2023, Japanese

Nov. 2023, Japanese

Sep. 2023, Japanese

10 Aug. 2023, Japanese

10 Aug. 2023, Japanese

10 Aug. 2023, Japanese, Domestic conference

10 Aug. 2023

Visible-light absorption of heteroleptic Cu(I)–bipyridine complexes as photosensitizers for photocatalytic CO2 reduction, Hiroyuki Takeda, Natsumi Hirosaka, Kohei Takahashi, Yui Namiki, Akitaka Ito, Masao Kurosu, Takako Muraoka, Motoko S. Asano, The 31st International Conference on Photochemistry (ICP2023), 26 Jul. 2023, English, International conference

Photocatalytic CO2 Reduction Using Mixed Catalyst of an Fe ion with Bipyridine Derivatives, Masao Kurosu, Hiroyuki Takeda, Motoko S. Asano, The 31st International Conference on Photochemistry (ICP2023), 25 Jul. 2023, English

22 Mar. 2023, 22 Mar. 2023, 25 Mar. 2023

22 Mar. 2023, 22 Mar. 2023, 25 Mar. 2023

22 Mar. 2023, 22 Mar. 2023, 25 Mar. 2023

22 Mar. 2023, 22 Mar. 2023, 25 Mar. 2023

02 Dec. 2022

03 Dec. 2022, 03 Dec. 2022, 03 Dec. 2022

13 Sep. 2022, 13 Sep. 2022, 15 Sep. 2022

Photocatalytic CO2 Reduction Using Heteroleptic Cu(I) Bipyridine Complexes As a Photosensitizer, Hiroyuki Takeda, Kohei Takahashi, Yui Namiki, Motoko S. Asano, 8th Asian Conference on Coordination Chemistry (ACCC8), 09 Aug. 2022, 07 Aug. 2022, 11 Aug. 2022, English, International conference

06 Aug. 2022, 05 Aug. 2022, 07 Aug. 2022

06 Aug. 2022, 05 Aug. 2022, 07 Aug. 2022

06 Aug. 2022, 05 Aug. 2022, 07 Aug. 2022

06 Aug. 2022, 05 Aug. 2022, 07 Aug. 2022, Japanese

Photocatalytic CO2 Reduction Using Cu(I) Complexes as a Redox Photosensitizer, Hiroyuki Takeda, St. Joseph's College, One day International Webinar on Recent Trends in Photochemistry, 14 May 2022, 14 May 2022, 14 May 2022, English, International conference

06 Nov. 2021, 06 Nov. 2021, 06 Nov. 2021, Japanese

10 Aug. 2021, Japanese

10 Aug. 2021, Japanese

04 Dec. 2021

Efficient Photocatalytic CO2 Reduction Using Abundant Metal Complexes, Hiroyuki Takeda, Kazuhide Koike, Osamu Ishitani, 2021 International Chemical Congress of Pacific Basin Societies (PACIFICHEM2021), 19 Dec. 2021, English, International conference

23 Mar. 2022, Japanese

23 Mar. 2022

01 Apr. 2025, 30 Sep. 2024, Principal investigator, Competitive research funding, No international co-authorship, 25DS0740

202504, 9999

202404, 9999

202104, 202403

202009, 202103

202010, 202103