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dc.contributorWichita State University. Department of Chemistryen_US
dc.contributor.authorD'Souza, Francisen_US
dc.contributor.authorSmith, Phillip M.en_US
dc.contributor.authorZandler, Melvin E.en_US
dc.contributor.authorMcCarty, Amy L.en_US
dc.contributor.authorItou, Mitsunarien_US
dc.contributor.authorAraki, Yasuyakien_US
dc.contributor.authorIto, Osamuen_US
dc.identifierGM 59038en_US
dc.identifier.citationJournal of the American Chemical Society. 2004 Jun 30; 126(25): 7898-907.en_US
dc.descriptionClick on the DOI link below to access the article (may not be free).en_US
dc.description.abstractThe first example of a working model of the photosynthetic antenna-reaction center complex, constructed via self-assembled supramolecular methodology, is reported. For this, a supramolecular triad is assembled by axially coordinating imidazole-appended fulleropyrrolidine to the zinc center of a covalently linked zinc porphyrin-boron dipyrrin dyad. Selective excitation of the boron dipyrrin moiety in the boron dipyrrin-zinc porphyrin dyad resulted in efficient energy transfer (k(ENT)(singlet) = 9.2 x 10(9) s(-)(1); Phi(ENT)(singlet) = 0.83) creating singlet excited zinc porphyrin. Upon forming the supramolecular triad, the excited zinc porphyrin resulted in efficient electron transfer to the coordinated fullerenes, resulting in a charge-separated state (k(cs)(singlet) = 4.7 x 10(9) s(-)(1); Phi(CS)(singlet) = 0.9). The observed energy transfer followed by electron transfer in the present supramolecular triad mimics the events of natural photosynthesis. Here, the boron dipyrrin acts as antenna chlorophyll that absorbs light energy and transports spatially to the photosynthetic reaction center, while the electron transfer from the excited zinc porphyrin to fullerene mimics the primary events of the reaction center where conversion of the electronic excitation energy to chemical energy in the form of charge separation takes place. The important feature of the present model system is its relative "simplicity" because of the utilized supramolecular approach to mimic rather complex "combined antenna-reaction center" events of photosynthesis.en_US
dc.description.sponsorshipNIGMS NIH HHSen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.ispartofseriesJournal of the American Chemical Societyen_US
dc.relation.ispartofseriesJ. Am. Chem. Soc.en_US
dc.subjectResearch Support, Non-U.S. Gov'ten_US
dc.subjectResearch Support, U.S. Gov't, Non-P.H.S.en_US
dc.subjectResearch Support, U.S. Gov't, P.H.S.en_US
dc.subject.meshElectron Transporten_US
dc.subject.meshEnergy Transfer/radiation effectsen_US
dc.subject.meshEnergy-Generating Resourcesen_US
dc.subject.meshModels, Biologicalen_US
dc.subject.meshSpectrum Analysisen_US
dc.titleEnergy transfer followed by electron transfer in a supramolecular triad composed of boron dipyrrin, zinc porphyrin, and fullerene: a model for the photosynthetic antenna-reaction center complexen_US
dc.coverage.spacialUnited Statesen_US
dc.description.versionpeer revieweden_US
dc.rights.holderCopyright © 2004 American Chemical Societyen_US

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