リチウムイオン内包フラーレンの超分子錯体を用いた近赤外応答性光電変換系の開発

2014 Fiscal Year Annual Research Report

• Project/Area Number: 26288037
• Research Institution: Osaka University
• Principal Investigator: 大久保 敬 大阪大学, 工学(系)研究科(研究院), 特任教授 (00379140)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 近赤外 / 色素増感型太陽電池 / フラーレン / π-π相互作用 / 電子移動 / レーザーフラッシュフォトリシス / 光反応 / 超分子

Outline of Annual Research Achievements

優れた電子アクセプターであるLi+@C60はカチオン性フラーレンであるので、極性溶媒中でもアニオン性電子ドナーと相互作用する。実際にLi+@C60と近赤外域に光吸収をするクロリン誘導体あるいはフタロシアニン誘導体をベンゾニトリル中で混合することにより、イオン間相互作用およびπ-π相互作用によって極性溶媒中でも安定な超分子を構築することが出来た。またポルフィリン部位を光励起すると、ポルフィリンからLi+@C60への超分子内光誘起電荷分離が進行することを見いだした。
電荷分離寿命の長い超分子を太陽電池の電極に担持した場合、電極との電子授受を効率的に行い高いエネルギー変換効率を与えた。実際の作成では、前述のアニオン性ポルフィリン／Li+@C60超分子を貧溶媒に混合し得られるナノ粒子を電極上に電解担持した。この電極を用いて色素増感太陽電池を作成し、各波長での量子効率を測定したところ、全ての波長域で参照のものと比べ非常に高い量子収率を示した。これは超分子形成とナノ粒子化によって新たな吸収帯が生じたためである。またこの色素増感太陽電池のエネルギー変換効率は2.1 %であった。以前報告されていた、中性のポルフィリン・C60で構成された同様の系の太陽電池のエネルギー変換効率は0.03 %であり、リチウムイオン内包フラーレンを用いることにより約70倍のエネルギー変換効率を得ることに成功した。

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

平成26年度の計画は、カチオン性Li+@C60の電子供与体となるアニオン性のポルフィリン、クロリン、バクテリオクロリン、フタロシアニンの合成を行い、Li+@C60との超分子錯体の錯形成などの評価を行った。合成した化合物をベンゾニトリル溶液に溶かし、そこにLi+@C60を添加し、超分子形成を評価する。具体的には、UV-visや発光スペクトルのタイトレーション測定やJob'sプロットなどを行い、錯形成定数を決定した。密度汎関数計算を行い、HOMOおよびLUMOの分布を調べた。電気化学測定（ＣＶ、ＤＰＶ）などで、酸化還元電位を決定し、電荷分離エネルギーを決定する。この値と、発光と吸収スペクトルから求められる、励起エネルギーより自由エネルギー変化を算出し、光電子移動が可能かどうか検証する。光電子移動反応のダイナミクスは、フェムト秒またはナノ秒時間分解レーザーフラッシュ過渡分光測定、フェムト秒時間分解蛍光寿命測定により観測し、反応中間体などの検出および速度を決定した。その結果、数100マイクロ秒の電荷分離寿命が観測された。

Strategy for Future Research Activity

当初予定通り、色素増感太陽電池の作製・評価を行う予定である。具体的な方法は、超分子錯体を高濃度で含むベンゾニトリル溶液をアセトニトリルなどの貧溶媒にシリンジで注入し、超分子クラスターを形成する。このクラスターを電気泳動法で透明電極上に電着し色素担持電極を作製する。クラスターの物性評価は透過型電子顕微鏡（ＴＥＭ）測定や動的光散乱（ＤＬＳ）測定で行う。次に、疑似太陽光照射装置などを用いて、光電変換特性について詳細に調べる。IPCEやエネルギー変換効率などを太陽電池の基礎的な物理化学パラメーターを決定する。超分子クラスター中の光電荷分離の検出はナノ秒レーザーフラッシュ拡散反射式時間分解過渡吸収測定および時間分解ＥＳＲ測定（いずれも現有設備を使用可能）で行う。

Causes of Carryover

高価なリチウムイオン内包フラーレンやフタロシアニン合成の前駆体の購入を見込んでいたが、予想していたよりも効率のいい合成が見つかったので、当初見込額よりも試薬代金を大きく減らすことができたため。

Expenditure Plan for Carryover Budget

デバイス合成のためには多くの試薬、ガラス器具の購入が見込まれるので平成26年度で余った研究費を用いて、さらに研究を加速させたい。また、デバイス作製についても様々な材料の購入が見込まれる。

Research Products

• [Journal Article] Laser-Induced Hydrogen Evolution from Benzene and Water Using Metal Free Single-Walled Carbon Nanotubes with High Quantum Yields (2015)
  • Author(s): Ohkubo, K.; Kohno, N.; Yamada, Y.; Fukuzumi, S.
  • Journal Title: Chem. Sci. Volume: 6 Pages: 666-674
  • DOI: 10.1039/c4sc02269f
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Singlet Oxygen Generation from Li+@C60 Nano-Aggregates Dispersed by Laser Irradiation in Aqueous Solution (2015)
  • Author(s): Ohkubo, K.; Kohno, N.; Yamada, Y.; Fukuzumi, S.
  • Journal Title: Chem. Commun. Volume: 51 Pages: 8082-8085
  • DOI: 10.1039/c5cc01885d
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Near-Infrared Photoelectrochemical Conversion via Photoinduced Charge Separation in Supramolecular Complexes of Anionic Phthalocyanines with Li+@C60 (2015)
  • Author(s): Kawashima, Y.; Ohkubo, K.; Blas-Ferrando, V. M.; Sakai, H.; Font-Sanchis, E.; Ortis, J.; Fernandez-Lazaro, F.; Hasobe, T.; Sastre-Santos, A.; Fukuzumi, S.
  • Journal Title: J. Phys. Chem. B Volume: 119 Pages: 7690-7697
  • DOI: 10.1021/jp5123163
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Efficient Charge Separation in Li+@C60 Supramolecular Complexes with Electron Donors (2015)
  • Author(s): Kawashima, Y.; Ohkubo, K.; Fukuzumi, S.
  • Journal Title: Chem. Asian J. Volume: 10 Pages: 44-54
  • DOI: 10.1002/asia.201403075
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Photocatalytic H2 Evolution from NADH with Carbon Quantum Dots/Pt and 2-Phenyl-4-(1-naphthyl)quinolinium Ion (2015)
  • Author(s): Wu, W.; Zhan, L.; Ohkubo, K.; Yamada, Y.; Wu, M.; Fukuzumi, S.
  • Journal Title: J. Photochem. Photobiol. B Biol. Volume: 148 Pages: 印刷中
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Synthesis and Photodynamics of Diphenylethylene-Bridged Porphyrin-Quinoidal Porphyrin Hybrids (2015)
  • Author(s): Sakatani, S.; Kamimura, T.; Ohkubo, K.; Fukuzumi, S.; Tani, F.
  • Journal Title: J. Porphyrins Phthalocyanines Volume: 19 Pages: 219-232
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Solvent-Free One-Step Photochemical Hydroxylation of Benzene Derivatives by the Singlet Excited State of 2,3-Dichloro-5,6-dicyano-p-benzoquinone Acting as a Super Oxidant (2015)
  • Author(s): Ohkubo, K.; Hirose, K.; Fukuzumi, S.
  • Journal Title: Chem.-Eur. J. Volume: 21 Pages: 2855-2861
  • DOI: 10.1002/chem.201404810
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Mechanisms and Applications of Cyclometalated Pt(II) Complexes in Photoredox Catalytic Trifluoromethylation (2015)
  • Author(s): Choi, W. J.; Choi, S.; Ohkubo, K.; Fukuzumi, S.; Cho, E. J.; You, Y.
  • Journal Title: Chem. Sci. Volume: 6 Pages: 1454-1464
  • DOI: 10.1039/c4sc02537g
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Ultrafast Photoinduced Electron Transfer in Face-to-Face Charge-Transfer π-Complexes of Planar Porphyrins and Hexaazatriphenylene Derivatives (2015)
  • Author(s): Aoki, T.; Sakai, H.; Ohkubo, K.; Sakanoue, T.; Takenobu, T.; Fukuzumi, S.; Hasobe, T.
  • Journal Title: Chem. Sci. Volume: 6 Pages: 1498-1509
  • DOI: 10.1039/c4sc02787f
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Much Enhanced Catalytic Reactivity of Cobalt Chlorin Derivatives on Two-Electron Reduction of Dioxygen to Produce Hydrogen Peroxide (2015)
  • Author(s): Mase, K.; Ohkubo, K.; Fukuzumi, S.
  • Journal Title: Inorg. Chem. Volume: 54 Pages: 1808-1815
  • DOI: 10.1021/ic502678k
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Nickel and Palladium Complexes of a Non-innocent β-Diketiminate Ligand Containing Phenol Groups (2015)
  • Author(s): Morimoto, Y.; Takaichi, J.; Hanada, S.; Ohkubo, K.; Sugimoto, H.; Fujieda, N.; Fukuzumi, S.; Itoh, S.
  • Journal Title: J. Porphyrins Phthalocyanines Volume: 19 Pages: 377-387
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Does a Nitrogen Matter?: Synthesis and Photoinduced Electron Transfer of Perylenediimide Donors Covalently Linked to C59N and C60 Acceptors (2015)
  • Author(s): Martin-Gomis, L.; Rotas, G.; Ohkubo, K.; Fernandez-Lazaro, F.; Fukuzumi, S.; Tagmatarchis, N.; Sastre-Santos, A.
  • Journal Title: Nanoscale Volume: 7 Pages: 7437-7444
  • DOI: 10.1039/C5NR00308C
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Lewis Acid-Induced Change from Four- to Two-Electron Reduction of Dioxygen Catalyzed by Copper Complexes Using Scandium Triflate (2015)
  • Author(s): Kakuda, S.; Rolle, C. J.; Ohkubo, K.; Siegler, M. A.; Karlin, K. D.; Fukuzumi, S.
  • Journal Title: J. Am. Chem. Soc. Volume: 137 Pages: 3330-3337
  • DOI: 10.1021/ja512584r
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Near-Infrared-Induced Electron Transfer of an Uranyl Macrocyclic Complex without Energy Transfer to Dioxygen (2015)
  • Author(s): Davis, C. D.; Ohkubo, K.; Ho, I.-T.; Zhang, Z.; Ishida, M.; Fang, Y.; Lynch, V. M.; Kadish, K. M.; Sessler, J. L.; Fukuzumi, S.
  • Journal Title: Chem. Commun. Volume: 54 Pages: 印刷中
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Catalytic Two-Electron Reduction of Dioxygen by Ferrocene Derivatives with Manganese(V) Corroles (2015)
  • Author(s): Jung, J.; Liu, S.; Ohkubo, K.; Abu-Omar, M. M.; Fukuzumi, S.
  • Journal Title: Inorg. Chem. Volume: 53 Pages: 印刷中
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Light-Driven, Proton-Controlled, Catalytic Aerobic C-H Oxidation Mediated by a Mn(III) Porphyrinoid Complex (2015)
  • Author(s): Neu, H.; Jung, J.; Baglia, R. A..; Siegler, M. A.; Ohkubo, K.; Fukuzumi, S. Goldberg, D. P.
  • Journal Title: J. Am. Chem. Soc. Volume: 137 Pages: 印刷中
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Solubilisation of 2,2-Diphenyl-1-picrylhydrazyl Radical to Water by β-Cyclodextrin to Evaluate the Radical-Scavenging Activity of Antioxidants in Aqueous Media (2015)
  • Author(s): Nakanishi, I.; Ohkubo, K.; Imai, K.; Kamibayashi, M.; Yoshihashi, Y.; Matsumoto, K.-i.; Fukuhara, K.; Terada, K.; Itoh, S.; Ozawa, T.; Fukuzumi, S.
  • Journal Title: Chem. Commun. Volume: 54 Pages: 印刷中
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Tetrapheneylethene- based Star Shaped Porphyrins: Synthesis, Self-assembly, Optical and Photophysical Study (2015)
  • Author(s): Rananaware, A.; Bhosale, R. S.; Ohkubo, K.; Patil, H.; Jones, L. A.; Jackson, S. L.; Fukuzumi, S.; Bhosale, S. V.; Bhosale, S. V.
  • Journal Title: J. Org. Chem. Volume: 80 Pages: 印刷中
  • Peer Reviewed
• [Journal Article] Disproportionation of 2,2-Diphenyl-1-Picrylhydrazyl Radical as a Model of Reactive Oxygen Species Catalysed by Lewis and/or Bronsted Acids (2014)
  • Author(s): Nakanishi, I.; Kawashima, T.; Ohkubo, K.; Waki, T.; Uto, Y.; Kamada, T.; Ozawa, T.; Matsumoto, K.; Fukuzumi, S.
  • Journal Title: Chem. Commun. Volume: 50 Pages: 814-816
  • DOI: 10.1039/c3cc47819j
  • Peer Reviewed
• [Journal Article] Highly Efficient Cycloreversion of Photochromic Dithienylethene Compounds Using Visible Light-Driven Photoredox Catalysis (2014)
  • Author(s): Lee, S.; You, Y.; Ohkubo, K.; Fukuzumi, S.; Nam, W.
  • Journal Title: Chem. Sci. Volume: 5 Pages: 1463-1474
  • DOI: 10.1039/c3sc52900b
  • Peer Reviewed / Open Access
• [Journal Article] Photoinduced Electron Transfer in a Supramolecular Nanohybrid Between a Carbon Nanohorn with an NH3+ Moiety and C60 with a Crown Ether Moiety (2014)
  • Author(s): Vizuete, M.; Gomez-Escalonilla, M. J.; Fierro, J. L. G.; Ohkubo, K.; Fukuzumi, S.; Yudasaka, M.; Iijima, S.; Nierengarten, J.-F.; Langa, F.
  • Journal Title: Chem. Sci. Volume: 5 Pages: 2072-2080
  • DOI: 10.1039/c3sc53342e
  • Peer Reviewed / Open Access
• [Journal Article] Bisdonor-azaBODIPY-Fullerene Supramolecules; Syntheses, Characterization and Light Induced Electron Transfer Studies (2014)
  • Author(s): Bandi, V.; El-khouly, M. E.; Ohkubo, K.; Nesterov, V. N. Zandler, M. E.; Fukuzumi, S.; D’Souza, F.
  • Journal Title: J. Phys. Chem. C Volume: 118 Pages: 2321-2332
  • DOI: 10.1021/jp4112469
  • Peer Reviewed
• [Journal Article] Selective Interaction of Single-walled Carbon Nanotubes and Propylamine under Photoirradiation (2014)
  • Author(s): Maeda, Y.; Hasuike, Y.; Ohkubo, K.; Tashiro, A.; Kaneko, S.; Yamada, M.; Hasegawa, T.; Akasaka, T.; Zhou, J.; Lu, J.; Nagase, S.; Fukuzumi, S.
  • Journal Title: ChemPhysChem Volume: 15 Pages: 1821-1826
  • DOI: 10.1002/cphc.201301045
• [Journal Article] Electron-Transfer Reduction Properties and Excited-State Dynamics of Benzo[ghi]peryleneimide and Coroneneimide Derivatives (2014)
  • Author(s): Ida, K.; Sakai, H.; Ohkubo, K.; Araki, Y.; Wada, T.; Sakanoue, T.; Takenobu, T.; Fukuzumi, S.; Hasobe, T.
  • Journal Title: J. Phys. Chem. C Volume: 118 Pages: 7710-7720
  • DOI: 10.1021/jp500761f
  • Peer Reviewed
• [Journal Article] Long-Lived Charge Separation and Applications in Artificial Photosynthesis (2014)
  • Author(s): Fukuzumi, S.; Ohkubo, K.; Suenobu, T.
  • Journal Title: Acc. Chem. Res. Volume: 47 Pages: 1455-1464
  • DOI: 10.1021/ar400200u
  • Peer Reviewed
• [Journal Article] Enhancement of Ultraviolet Light Responsivity of a Pentacene Phototransistor by Introducing Photoactive Molecules into a Gate Dielectric (2014)
  • Author(s): Dao, T.; Matsushima, T.; Murakami, M.; Ohkubo, K.; Fukuzumi, S.; Murata, H.
  • Journal Title: Jpn. J. Appl. Phys. Volume: 53 Pages: 02BB03/1-5
  • DOI: 10.7567/JJAP.53.02BB03
  • Peer Reviewed
• [Journal Article] Sumanenetrione Anions Generated by Electrochemical and Chemical Reduction (2014)
  • Author(s): Higashibayashi, S.; Shrestha, B. B.; Morita, Y.; Ehara, M.; Ohkubo, K.; Fukuzumi, S.; Sakurai, H.
  • Journal Title: Chem. Lett. Volume: 43 Pages: 1297-1299
  • DOI: 10.1246/c1.140351
  • Peer Reviewed
• [Journal Article] Redox Chemistry of Nickel(II)-Complexes Supported by a Series of Non-innocent β-Diketiminate Ligands (2014)
  • Author(s): Takaichi, J.; Morimoto, Y.; Ohkubo, K.; Shimokawa, C.; Hojo, T.; Mori, S.; Asahara, H.; Sugimoto, H.; Fujieda, N.; Nishiwaki, N.; Fukuzumi, S.; Itoh, S.
  • Journal Title: Inorg. Chem. Volume: 52 Pages: 6159-6169
  • DOI: 10.1021/ic5006693
  • Peer Reviewed
• [Journal Article] Mechanistic Insights into the Oxidation of Substituted Phenols via Hydrogen Atom Abstraction by a Cupric Superoxo Complex (2014)
  • Author(s): Lee, J. Y.; Peterson, R. L.; Ohkubo, K.; Garcia-Bosch, I.; Himes, R. A.; Voertink, J.; Moore, C. D.; Solomon, E. I.; Fukuzumi, S.; Karlin, K. D.
  • Journal Title: J. Am. Chem. Soc. Volume: 136 Pages: 9925-9937
  • DOI: 10.1021/ja503105b
  • Peer Reviewed
• [Journal Article] Mechanistic Insights into the Oxidation of Substituted Phenols via Hydrogen Atom Abstraction by a Cupric Superoxo Complex (2014)
  • Author(s): Bill, N. L.; Ishida, M.; Kawashima, Y.; Ohkubo, K.; Sung, Y. M.; Lynch, V. M.; Lim, J. M.; Kim, D.; Sessler, J. L.; Fukuzumi, S.
  • Journal Title: Chem. Sci. Volume: 5 Pages: 3888-3896
  • DOI: 10.1039/c4sc00803k
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Control of Reaction Pathways in the Photochemical Reaction of a Quinone with Tetramethylethylene by Metal Binding (2014)
  • Author(s): Yamamoto, H.; Ohkubo, K.; Akimoto, S.; Fukuzumi, S.; Tsuda, A.
  • Journal Title: Org. Biomol. Chem. Volume: 12 Pages: 7004-7017
  • DOI: 10.1039/c4ob00659c
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Organic Synthetic Transformations using Organic Dyes as Photoredox Catalysts (2014)
  • Author(s): Fukuzumi, S.; Ohkubo, K.
  • Journal Title: Org. Biomol. Chem. Volume: 12 Pages: 6059-6071
  • DOI: 10.1039/c4ob00843j
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Photoinduced Electron Transfer from a Tetrathiafulvalene-Calix[4]pyrrole to a Porphyrin Carboxylate within a Supramolecular Ensemble (2014)
  • Author(s): Davis, C. M.; Kawashima, Y.; Ohkubo, K.; Lim, J. M.; Kim, D.; Fukuzumi, S.; Sessler, J. L.
  • Journal Title: J. Phys. Chem. C Volume: 118 Pages: 13503-13513
  • DOI: 10.1021/jp504087b
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Evaluation of the Sonosensitizing Activities of 5-Aminolevulinic Acid and Sn(IV) Chlorin e6 in Tumor-bearing Chick Embryos (2014)
  • Author(s): Uto, Y.; Tamatani, D.; Mizuki, Y.; Endo, Y.; Nakanishi, I.; Ohkubo, K.; Fukuzumi, S.; Ishizuka, M.; Tanaka, T.; Kuchiike, D.; Kubo, K.; Inui, T.; Hori, H.
  • Journal Title: Anticancer Res. Volume: 34 Pages: 4583-4588
  • Acknowledgement Compliant
• [Journal Article] Photoinduced Electron Transfer in a Dynamic Supramolecular System with Curved π-structures (2014)
  • Author(s): Hitosugi, S.; Ohkubo, K.; Iizuka, R.; Kawashima, Y.; Nakamura, K.; Sato, S.; Kono, H.; Fukuzumi, S.; Isobe, H.
  • Journal Title: Org. Lett. Volume: 16 Pages: 3352-3355
  • DOI: 10.1021/ol501381x
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Robust Inclusion Complexes of Crown-ether-fused Tetrathiafulvalenes with Li+@C60 Affording Efficient Photodriven Charge Separation (2014)
  • Author(s): Supur, M.; Kawashima, Y.; Larsen, K. R.; Ohkubo, K.; Jeppesen, J. O.; Fukuzumi, S.
  • Journal Title: Chem.-Eur. J. Volume: 20 Pages: 13976-13983
  • DOI: 10.1002/chem.201402449
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Submillisecond-Lived Photoinduced Charge Separation in a Fully Conjugated Phthalocyanine-Perylenebenzimidazole Dyad (2014)
  • Author(s): Blas-Ferrando, V. M.; Ortiz, J.; Ohkubo, K.; Fukuzumi, S.; Fernandez-Lazaro, F.; Sastre-Santos, A.
  • Journal Title: Chem. Sci. Volume: 5 Pages: 4785-4793
  • DOI: 10.1039/c4sc01579g
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Cyclo[8]pyrrole: An Androgynous Expanded Porphyrin that Acts as Both an Electron Donor and Acceptor in Anion-Bound Supramolecular Electron Transfer Complexes (2014)
  • Author(s): Ohkubo, K.; Mase, K.; Karnas, E.; Sessler, J. L.; Fukuzumi, S.
  • Journal Title: J. Phys. Chem. C Volume: 118 Pages: 18436-18444
  • DOI: 10.1021/jp505750e
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Photocatalytic Oxygenation of 10-Methyl-9,10-dihydroacridine by O2 with Manganese Porphyrins (2014)
  • Author(s): Jung, J.; Ohkubo, K.; Goldberg, D.; Fukuzumi, S.
  • Journal Title: J. Phys. Chem. A Volume: 118 Pages: 6223-6229
  • DOI: 10.1021/jp505860f
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Supramolecular Formation of Li+@PCBM Fullerene with Sulfonated Porphyrins and Long-Lived Charge-Separation (2014)
  • Author(s): Kawashima, Y.; Ohkubo, K.; Okada, H.; Matsuo, Y.; Fukuzumi, S.
  • Journal Title: ChemPhysChem Volume: 15 Pages: 3782-3790
  • DOI: 10.1002/cphc.201402512
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Binding of Scandium Ions to Metalloporphyrin;Flavin Complexes for Long-Lived Charge Separation (2014)
  • Author(s): Kojima, T.; Kobayashi, R.; Ishizuka, T.; Yamakawa, S.; Kotani, H.; Nakanishi, T.; Ohkubo, K.; Shiota, Y.; Yoshizawa, K.; Fukuzumi, S.
  • Journal Title: Chem.-Eur. J. Volume: 20 Pages: 15518-15532
  • DOI: 15518-15532
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Electronic Infrared Light Absorption of Tri-palladium Complex Containing Two π-Expanded Tetracene Ligands (2014)
  • Author(s): Suzuki, T.; Nakagawa, T.; Ohkubo, K.; Fukuzumi, S.; Matsuo, Y.
  • Journal Title: Chem. Sci. Volume: 5 Pages: 4888-4894
  • DOI: 10.1039/c4sc02018a
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Photoinduced Electron Transfer in a Charge-Transfer Complex Formed between Corannulene and Li+@C60 by Concave-Convex π-π Interactions (2014)
  • Author(s): Yamada, M.; Ohkubo, K.; Shionoya, M.; Fukuzumi
  • Journal Title: J. Am. Chem. Soc. Volume: 136 Pages: 13240-13248
  • DOI: 10.1021/ja505391x
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Photoelectrochemical Properties of Supramolecular Composites of an Anionic Zinc Chlorin and Li+@C60 on SnO2 (2014)
  • Author(s): Ohkubo, K.; Kawashima, Y.; Mase, K.; Sakai, H.; Hasobe, T.; Fukuzumi, S.
  • Journal Title: J. Porphyrins Phthalocyanines Volume: 18 Pages: 982-990
  • DOI: 10.1142/S1088424614500825
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Photoinduced Charge Separation in Ordered Self-Assemblies of Perylenediimide-Graphene Oxide Hybrid Layers (2014)
  • Author(s): Supur, M.; Ohkubo, K.; Fukuzumi, S.
  • Journal Title: Chem. Commun. Volume: 50 Pages: 13359-13361
  • DOI: 10.1039/c4cc056.94a
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Formation of the Long-Lived Charge-Separated State of the 9-Mesityl-10-methylacridinium Cation Incorporated into Mesoporous Aluminosilicate at High Temperatures (2014)
  • Author(s): Fukuzumi, S.; Itoh, A.; Suenobu, T.; Ohkubo, K.
  • Journal Title: J. Phys. Chem. A Volume: 118 Pages: 24188-24196
  • DOI: 10.1021/jp508155u
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Long-Lived Charge Separation in a Rigid Pentiptycene Bis(crown ether)-Li+@C60 Host-Guest Complex (2014)
  • Author(s): Supur, M.; Kawashima, Y.; Ma, Y.-X.; Ohkubo, K.; Chen, C.-F.; Fukuzumi, S.
  • Journal Title: Chem. Commun. Volume: 50 Pages: 15796-15798
  • DOI: 10.1039/c4cc07795d
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] p-ベンゾキノン誘導体の光励起状態を用いた芳香族化合物の溶媒フリー光水酸化反応 (2014)
  • Author(s): 大久保 敬
  • Organizer: 第47回酸化反応討論会
  • Place of Presentation: 崇城大学ホール（熊本市）
  • Year and Date: 2014-11-14 – 2014-11-15
• [Presentation] 有機フォトレドックス触媒を用いた選択的有機合成 (2014)
  • Author(s): 大久保 敬
  • Organizer: ２０１４年度有機光化学研究会
  • Place of Presentation: まつや千千（あわら市）
  • Year and Date: 2014-11-06 – 2014-11-07
  • Invited
• [Presentation] 2,3-ジクロロ-5,6-ジシアノ-p-ベンゾキノンの光励起状態を用いたベンゼン類の溶媒フリー光水酸化反応 (2014)
  • Author(s): 大久保 敬
  • Organizer: 2014年光化学討論会
  • Place of Presentation: 北海道大学（札幌市）
  • Year and Date: 2014-10-11 – 2014-10-13
• [Presentation] Charge-Transfer Complexation and Photoinduced Electron Transfer between Corannulene and Lithium Ion-Encapsulated [60]Fullerene (2014)
  • Author(s): Mihoko Yamada, Kei Ohkubo, Mitsuhiko Shionoya, Shunichi Fukuzumi
  • Organizer: 第47回フラレーン・ナノチューブ・グラフェンシンポジウム
  • Place of Presentation: 名古屋大学東山キャンパス（名古屋市）
  • Year and Date: 2014-09-03 – 2014-09-05
• [Presentation] リチウムイオン内包フラーレン－ポルフィリノイド超分子錯体の光電荷分離と光電変換 (2014)
  • Author(s): 大久保 敬
  • Organizer: 第３８回有機電子移動化学討論会
  • Place of Presentation: 長良川国際会議場（岐阜市）
  • Year and Date: 2014-06-26 – 2014-06-27
• [Presentation] Metal-free Two-Electron Reduction of Oxygen Catalyzed by [1,4]Triphyrin(2.1.1) (2014)
  • Author(s): 大久保 敬
  • Organizer: Eighth International Conference on Porphyrins and Phthalocyanines (ICPP-8)
  • Place of Presentation: トルコ イスタンブール
  • Year and Date: 2014-06-22 – 2014-06-27
  • Invited
• [Presentation] Supramolecular Donor-Acceptor Systems Using Lithium Ion Encapsulated Fullerene as an Electron Acceptor (2014)
  • Author(s): 大久保 敬
  • Organizer: The 10th Korea-Japan Symposium on Frontier Photoscience-2014 (KJFP-2014)
  • Place of Presentation: 韓国 ソウル
  • Year and Date: 2014-06-21 – 2014-06-23
  • Invited
• [Book] Encyclopedia of Reagents for Organic Synthesis (2015)
  • Author(s): Ohkubo, K.; Fukuzumi, S.
  • Total Pages: 2
  • Publisher: p-Chloranil