Energy and photoinduced electron transfer in a wheel-shaped artificial photosynthetic antenna-reaction center complex

Gerdenis Kodis, Yuichi Terazono, Paul A. Liddell, Joakim Andréasson, Vikas Garg, Michael Hambourger, Thomas A Moore, Ana L Moore, John Devens Gust

Research output: Contribution to journalArticle

155 Citations (Scopus)

Abstract

Functional mimics of a photosynthetic antenna-reaction center complex comprising five bis-(phenylethynyl)anthracene antenna moieties and a porphyrin-fullerene dyad organized by a central hexaphenylbenzene core have been prepared and studied spectroscopically. The molecules successfully integrate singlet-singlet energy transfer and photoinduced electron transfer. Energy transfer from the five antennas to the porphyrin occurs on the picosecond time scale with a quantum yield of 1.0. Comparisons with model compounds and theory suggest that the Förster mechanism plays a major role in the extremely rapid energy transfer, which occurs at rates comparable to those seen in some photosynthetic antenna systems. A through-bond, electron exchange mechanism also contributes. The porphyrin first excited singlet state donates an electron to the attached fullerene to yield a P.+-C60 .- charge-separated state, which has a lifetime of several nanoseconds. The quantum yield of charge separation based on light absorbed by the antenna chromophores is 80% for the free base molecule and 96% for the zinc analogue.

Original languageEnglish
Pages (from-to)1818-1827
Number of pages10
JournalJournal of the American Chemical Society
Volume128
Issue number6
DOIs
Publication statusPublished - Feb 15 2006

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Photosynthetic Reaction Center Complex Proteins
Energy Transfer
Porphyrins
Fullerenes
Wheels
Electrons
Antennas
Energy transfer
Quantum yield
Zinc
Molecules
Anthracene
Light
Chromophores
Excited states

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Energy and photoinduced electron transfer in a wheel-shaped artificial photosynthetic antenna-reaction center complex. / Kodis, Gerdenis; Terazono, Yuichi; Liddell, Paul A.; Andréasson, Joakim; Garg, Vikas; Hambourger, Michael; Moore, Thomas A; Moore, Ana L; Gust, John Devens.

In: Journal of the American Chemical Society, Vol. 128, No. 6, 15.02.2006, p. 1818-1827.

Research output: Contribution to journalArticle

Kodis, Gerdenis ; Terazono, Yuichi ; Liddell, Paul A. ; Andréasson, Joakim ; Garg, Vikas ; Hambourger, Michael ; Moore, Thomas A ; Moore, Ana L ; Gust, John Devens. / Energy and photoinduced electron transfer in a wheel-shaped artificial photosynthetic antenna-reaction center complex. In: Journal of the American Chemical Society. 2006 ; Vol. 128, No. 6. pp. 1818-1827.
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