Mimicry of the radical pair and triplet states in photosynthetic reaction centers with a synthetic model

Kobi Hasharoni, Haim Levanon, Scott R. Greenfield, David J. Gosztola, Walter A. Svec, Michael R Wasielewski

Research output: Contribution to journalArticle

105 Citations (Scopus)

Abstract

Supramolecular systems synthesized to model the photosynthetic reaction center (RC) are designed to mimic several key properties of the RC protein. Thus far, most RC models fulfill only a subset of these criteria, with very few reports employing time-resolved electron paramagnetic resonance spectroscopy (TREPR). We now report TREPR results on a photosynthetic model system (1) in a nematic liquid crystal (LC) that does not contain the natural pigments, yet closely mimics the spin dynamics of triplet state formation found only in photosynthetic RCs. The design of supermolecule 1 follows criteria established for promoting high quantum yield charge separation in glassy media. The observation of this triplet state in 1 by TREPR demonstrates that most of the electronic states found in the primary photochemistry of photosynthetic RCs can be mimicked successfully in synthetic models interacting with LCs.

Original languageEnglish
Pages (from-to)8055-8056
Number of pages2
JournalJournal of the American Chemical Society
Volume117
Issue number30
DOIs
Publication statusPublished - Aug 2 1995

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Photosynthetic Reaction Center Complex Proteins
Electron Spin Resonance Spectroscopy
Spectrum Analysis
Paramagnetic resonance
Spectroscopy
Photochemistry
Liquid Crystals
Spin dynamics
Nematic liquid crystals
Photochemical reactions
Electronic states
Quantum yield
Observation
Pigments
Proteins

ASJC Scopus subject areas

  • Chemistry(all)

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Mimicry of the radical pair and triplet states in photosynthetic reaction centers with a synthetic model. / Hasharoni, Kobi; Levanon, Haim; Greenfield, Scott R.; Gosztola, David J.; Svec, Walter A.; Wasielewski, Michael R.

In: Journal of the American Chemical Society, Vol. 117, No. 30, 02.08.1995, p. 8055-8056.

Research output: Contribution to journalArticle

Hasharoni, Kobi ; Levanon, Haim ; Greenfield, Scott R. ; Gosztola, David J. ; Svec, Walter A. ; Wasielewski, Michael R. / Mimicry of the radical pair and triplet states in photosynthetic reaction centers with a synthetic model. In: Journal of the American Chemical Society. 1995 ; Vol. 117, No. 30. pp. 8055-8056.
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