Publications

33 "Ruthenium Pyrazole Complexes: A Family of Highly Active Metallodrugs for Photoactivated Chemotherapy"

Masanari Hirahara,* Aki Iwamoto, Yuto Teraoka, Yuki, Mizuno, Yasushi Umemura, Takamasa Uekita*

Inorganic Chemistry, 2024, 63, 1988–1996

32 "Configurationally non-selective aquation of a mononuclear Ru(II) chloro complex to aquo complex isomers with distinctive aspects in photoisomerization, redox and catalytic water oxidation"

Yuta Tsubonouchi, Keisuke Inaba, Norihisa Hoshino, Masanari Hirahara, Debraj Chandra, Zaki. N. Zahran, Masayuki Yagi*

Inorganic Chemistry, 2023, 62, 17654–17667

31 "Binding of Stimuli-Responsive Ruthenium Aqua Complexes with 9-Ethylguanine"

Atsuki Maeda, Jun-ya Tokumoto, Soichiro Kojima, Keiichi Fujimori, Takayo Moriuchi-Kawakami, Masanari Hirahara*
ACS Omega, 2023, 8, 37391–37401

30 "Spontaneous Multilayer Formation of an Amphiphilic Alkylammonium Cation with a Long Hydrocarbon Chain at an Air-Clay Dispersion Interface"

Koji Yamamoto, Yoshihiro Miyauchi, Masanari Hirahara, Yasushi Umemura*
Thin Solid Films, 2023, 139960

29. "Deep-sea in situ determination of sulfide using a sensitized chemiluminescent terbium complex"

Keiichi Fujimori,* Akira Izutani, Kenta Tsujimoto, Masanari Hirahara, Takayo Moriuchi-Kawakami, Masato Ueda, Takahiko Suzue, Hideshi Kimoto, Kei Okamura
Analytical Sciences, 2023, 39, 1143-1149

28. "Distinctive aspects in aquation, proton-coupled redox and photoisomerization reactions between geometric isomers of mononuclear ruthenium complexes with a large-π-conjugated tetradentate ligand"

Yuta Tsubonouchi, Takeumi Watanabe, Kazuha Yoshida, Shunsuke Watabe, Keisuke Inaba, Masanari Hirahara, Tsubasa Hatanaka, Yasuhiro Funahashi, Debraj Chandra, Norihisa Hoshino, Zaki Zahran, Masayuki Yagi*
Inorganic Chemistry, 2022, 61(35) 13956-13967

27. "Photofunctional Molecular Assembly for Artificial Photosynthesis: Beyond a Simple Dye Sensitization Strategy"

Atsushi Kobayashi,* Shinya Takizawa, Masanari Hirahara,
Coordination Chemistry Reviews, 2022, 467, 214624

26. "A Visible-Light and Temperature Responsive Host-Guest System: Photoisomerization of a Ruthenium Complex and Inclusion Complex Formation with Cyclodextrins"

Masanari Hirahara,* Shota Furutani, Hiroki Goto, Keiichi Fujimori, Takayo Moriuchi-Kawakami
Dalton Transactions, 2022, 51, 4477–4483. DOI: 10.1039/d1dt04003k.

25. "Mechanism of H+ dissociation-induced O-O bond formation via intramolecular coupling of vicinal hydroxoes on low-valent Ru(III) centers"

Yuki Tanahashi, Kosuke Takahashi, Yuta Tsubonouchi, Shunsuke Nozawa, Shin-ichi Adachi, Masanari Hirahara, Eman A Mohamed, Zaki N Zahran, Kenji Saito, Tatsuto Yui, Masayuki Yagi*
Proceedings of the National Academy of Sciences of the United States of America, 2021, 118 (52), e2113910118; https://doi.org/10.1073/pnas.2113910118

24. "A Synthetic Route to a Ruthenium Complex via Successive Photosubstitution Reactions"
Masanari Hirahara* and Yasushi Umemura

Inorganic Chemistry, 2021, 60, 13193-13199.

23. "Efficient Electrocatalytic Water Oxidation by a Dinuclear Ruthenium(II) Complex with Vicinal Aquo and Hydroxo Groups Adsorbed on a TiO2 Electrode"
Yuki Tanahashi, Sho Nagai, Yuta Tsubonouchi, Masanari Hirahara, Taisei Sato, Eman A. Mohamed, Zaki N. Zahran, Kenji Saito, Tatsuto Yui, and Masayuki Yagi*

ACS Applied Energy Materials, 2020, 3, 12172-12184.

22. "A Multi-Stimuli Responsive Ruthenium Complex for Catalytic Water Oxidation"
Masanari Hirahara,* Hiroki Goto, Yasushi Umemura, Masayuki Yagi

Chemical Communications, 2020, 56, 12825-12828.

21. "Intramolecular Hydrogen Bonding: A Key Factor Controlling Photosubstitution of Ruthenium Complexes"
Masanari Hirahara,* Hiroyuki Nakano, Kyohei Uchida, Rei Yamamoto, Yasushi Umemura

Inorganic chemistry, 2020, 59, 11273-11286

20. "Application of Electrospray Spreading to a Modified Langmuir–Blodgett Technique for Organo-Clay Hybrid Film Preparation"
Masanari Hirahara, Hiroki Kaida, Yoshihiro Miyauchi, Hiroki Goto, Akihiko Yamagishi, Yasushi Umemura*

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2019, 580, 123714

19. "Critical Hammett Electron-Donating Ability of Substituent Groups for Efficient Water Oxidation Catalysis by Mononuclear Ruthenium Aquo Complexes"
Shunsuke Watabe, Yuki Tanahashi, Masanari Hirahara, Hirosato Yamazaki, Kosuke Takahashi, Eman Mohamed , Yuta Tsubonouchi, Zaki Zahran, Kenji Saito, Tatsuto Yui, Masayuki Yagi*

Inorganic chemistry, 2019, 58 (19), 12716-12723

18. "Photoisomerization and Thermal Isomerization of Ruthenium Aqua Complexes with Chloro-Substituted Asymmetric Bidentate Ligands"
Masanari Hirahara*, Hiroki Goto, Rei Yamamoto, Masayuki Yagi, Yasushi Umemura

RSC Advances, 2019, 9, 2002-2010

17. "Molecular Mimics of Heterogeneous Metal Phosphides: Thermochemistry, Hydride‐Proton Isomerism, and HER Reactivity"
Joshua A. Buss, Masanari Hirahara, Yohei Ueda, Theodor Agapie*

Angewandte Chemie International Edition, 2018, 57, 16329-16333

16. "Hybrid Film Formation of a Water-Insoluble Quaternary Alkylammonium Cation with Clay-Mineral-Layers"
Masanari Hirahara and Yasushi Umemura*

Thin Solid Films, 2017, 642, 377-383

15. "Mechanistic Insight into Reversible Core Structural Changes of Dinuclear μ-Hydroxoruthenium(II) Complexes with a 2,8-Di-2-pyridyl-1,9,10-anthyridine Backbone Prior to Water Oxidation Catalysis"
Masanari Hirahara* , Sho Nagai, Kosuke Takahashi, Shunsuke Watabe, Taisei Sato, Kenji Saito, Tatsuto Yui, Yasushi Umemura, and Masayuki Yagi*

Inorganic Chemistry, 2017, 56, 10235-10246

14. "Photoisomerization of Ruthenium(II) Aquo Complexes: Mechanistic Insight and Application Development"
Masanari Hirahara* and Masayuki Yagi*

Dalton Transactions, 2017, 46, 3787-3799

13. "Visible-Light-Induced Morphological Changes of Giant Vesicles by Photoisomerization of a Ruthenium Aqua Complex"

Masanari Hirahara*, Akira Tsukamoto, Hiroki Goto, Shigeru Tada, Masayuki Yagi, Yasushi Umemura*

Chemistry - A European Journal, 2016, 22, 2590-2594 link

12. "Fabrication of 3-Layer-Component Organo-Clay Hybrid Films with Reverse Deposition Orders by a Modified Langmuir-Schaefer Technique and Their Pyroelectric Currents Measured by a Non-Contact Method"

Masanari Hirahara, Yasushi Umemura

Langmuir, 2015, 31, 8346-8353 link

11. "A New Series of Dinuclear Ruthenium(II) Complexes Synthesized Using Photoisomerization for Efficient Water Oxidation Catalysis"

Masanari Hirahara, Sho Nagai, Kosuke Takahashi, Kenji Saito, Tatsuto Yui, and Masayuki Yagi*

Inorganic Chemistry, 2015, 54, 7627-7635 link

10. "Mechanisms and Factors Controlling Photoisomerization Equilibria, Ligand Exchange, and Water Oxidation Catalysis of Mononuclear Ruthenium(II) Complexes"

Masanari Hirahara, Tomoya Hakamata, Aaron B. League, Mehmed Z. Ertem, Kosuke Takahashi, Sho Nagai, Keisuke Inaba, Hirosato Yamazaki, Kenji Saito, Tatsuto Yui, Christopher J. Cramer, Masayuki Yagi*

European Journal of Inorganic Chemistry, 2015, 2015, 3892-3903 link

9. "Characterization of the Excited States of Distal- and Proximal-[Ru(tpy)(pynp)OH2]2+ in Aqueous Solution Using Time-Resolved Infrared Spectroscopy"

Sei'ichi Tanaka, Kosuke Takahashi, Masanari Hirahara, Masayuki Yagi, Ken Onda*
Journal of Photochemistry and Photobiology A: Chemistry, 2015, 313, 87-98 link

8. "Influence of Chloro Substituent on Photoisomerization, Redox Reactions and Water Oxidation Catalysis of Mononuclear Ruthenium Complexes"
Kosuke Takahashi, Xiaohong Zhang, Masanari Hirahara, Taisei Sato, Kenji Saito, Tatsuto Yui, Masayuki Yagi

Journal of Photochemistry and Photobiology A: Chemistry, 2015, 313, 117-125 link

7. "Artificial Manganese Center Models for Photosynthetic Oxygen Evolution in PS II"

Masanari Hirahara, Akinori Shoji, Masayuki Yagi*

European Journal of Inorganic Chemistry, 2014, 2014, 595-606 link

6. "Influencing Factors on Heterogeneous Water Oxidation Catalysis by Di-μ-Oxo Dimanganese Complex on Mica as Synthetic Model of Photosystem II"
Akinori Shoji, Masanari Hirahara, Hirosato Yamazaki, Masayuki Yagi*

Research on Chemical Intermediates, 2014, 40, 3199-3208 link

5. "Mechanisms of Photoisomerization and Water-Oxidation Catalysis of Mononuclear Ruthenium(II) Monoaquo Complexes"
Masanari Hirahara, Mehmed Z. Ertem, Manabu Komi, Hirosato Yamazaki, Christopher J. Cramer, and Masayuki Yagi*
Inorganic Chemistry, 2013, 52, 6354-6364. link

4. "Arrangement Effect of Di-μ-Oxo Dimanganese Catalyst and Ru(bpy)32+ Photoexcitation Centers Adsorbed in Mica on Visible-Light-Derived Water Oxidation"

Masanari Hirahara, Hirosato Yamazaki, Satoshi Yamada, Kazuki Matsubara, Kenji Saito, Tatsuto Yui and Masayuki Yagi*
Catalysis Science and Technology, 2013, 3, 1776-1781. link

3. "Synthesis, Characterization and Heterogeneous Catalysis for Water Oxidation of a Di-Manganese Complex with 4’-(4-Pyridyl)-2,2’:6’,2’’-Terpyridine)"

Hirosato Yamazaki, Tatsuya Ueno, Kaoru Aiso, Masanari Hirahara, Takeshi Aoki, Toshi Nagata, Satoshi Igarashi, Masayuki Yagi*
Polyhedron, 2013, 52, 455-460. link

2. "Syntheses, Characterization, and Photophysical Properties of Amidate-Bridged Pt(bpy) Dimers Tethered to Ru(bpy)32+ Derivatives"

Masanari Hirahara, Shigeyuki Masaoka and Ken Sakai*
Dalton Transaction, 2011, 40, 3967–3978. link

1. "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 Crystallographica., 2009, E65, m228-m229. link