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Journal article

Bisdonor-azaBODIPY-fullerene supramolecules: Syntheses, characterization, and light-induced electron-transfer studies

Bandi V, El-Khouly M, Ohkubo K, Nesterov V, Zandler M, Fukuzumi S, D'Souza F ...see all

Journal of Physical Chemistry C, vol. 118, issue 5 (2014) pp. 2321-2332

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Abstract

Achieving ultrafast light-induced charge separation requires carefully selected donor and acceptor entities often held together in a closer proximity. In the present investigation, two tetrads featuring a near-IR-emitting sensitizer, BF2-chelated dipyrromethene (azaBODIPY), covalently linked to a fullerene through the central boron atom and two electron-donor entities, namely, N,N-dimethylaminophenyl, or bithiophene in close proximity to the fullerene entity were designed and synthesized, and the results were compared to the earlier-reported bisferrocene–azaBODIPY–fullerene tetrads in this series. The tetrads synthesized by establishing a multistep procedure exhibited typical spectral, redox, and photo reactivities of the individual components with some degree of intramolecular interaction. The X-ray structure of one of the precursor triads was also solved as part of this investigation. Ultrafast photoinduced electron transfer was witnessed in the case of both tetrads by femtosecond transient absorption s...

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Authors

  • Venugopal Bandi

  • Mohamed E. El-Khouly

  • Kei Ohkubo

  • Vladimir N. Nesterov

  • Melvin E. Zandler

  • Shunichi Fukuzumi

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