Photoinduced electron transfer in a supramolecular triad produced by porphyrin anion-induced electron transfer from tetrathiafulvalene calix[4]pyrrole to Li+@C60

Christina M. Davis; Kei Ohkubo; Aaron D. Lammer; Dong Sub Kim; Yuki Kawashima; Jonathan L. Sessler; Shunichi Fukuzumi

doi:10.1039/C5CC03061G

Photoinduced electron transfer in a supramolecular triad produced by porphyrin anion-induced electron transfer from tetrathiafulvalene calix[4]pyrrole to Li⁺@C₆₀†

Christina M. Davis,^a Kei Ohkubo,^bc Aaron D. Lammer,^a Dong Sub Kim,^a Yuki Kawashima,^b Jonathan L. Sessler*^a and Shunichi Fukuzumi*^bcd

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* Corresponding authors

^a Department of Chemistry, The University of Texas, 105 E. 24th Street-Stop A5300, Austin, Texas, USA
E-mail: sessler@cm.utexas.edu

^b Department of Material and Life Science, Graduate School of Engineering, Osaka University and ALCA and SENTAN, Japan Science and Technology Agency (JST), 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan

^c Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea

^d Faculty of Science and Technology, Meijo University and ALCA and SENTAN, Japan Science and Technology Agency (JST), Tempaku, Nagoya, Aichi 468-8502, Japan
E-mail: fukuzumi@chem.eng.osaka-u.ac.jp

Abstract

Binding of a porphyrin carboxylate anion (1) to tetrathiafulvalene calix[4]pyrrole (TTF-C4P) results in electron transfer from TTF-C4P to Li⁺@C₆₀ to produce the charge-separated state (1/TTF-C4P˙⁺/Li⁺@C₆₀˙⁻) in benzonitrile. Upon photoexcitation of 1, photoinduced electron transfer from the triplet excited state of 1 to TTF-C4P˙⁺ occurs to produce the higher energy charge-separated state (1˙⁺/TTF-C4P/Li⁺@C₆₀˙⁻), which decays to the ground state with a lifetime of 4.8 μs.

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Article information

DOI: https://doi.org/10.1039/C5CC03061G
Article type: Communication
Submitted: 13 Apr 2015
Accepted: 06 May 2015
First published: 07 May 2015
This article is Open Access

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Chem. Commun., 2015,51, 9789-9792

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Photoinduced electron transfer in a supramolecular triad produced by porphyrin anion-induced electron transfer from tetrathiafulvalene calix[4]pyrrole to Li⁺@C₆₀

C. M. Davis, K. Ohkubo, A. D. Lammer, D. S. Kim, Y. Kawashima, J. L. Sessler and S. Fukuzumi, Chem. Commun., 2015, 51, 9789 DOI: 10.1039/C5CC03061G

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Chemical Communications