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Energy 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 complex

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dc.contributor Wichita State University. Department of Chemistry en_US
dc.contributor.author D'Souza, Francis en_US
dc.contributor.author Smith, Phillip M. en_US
dc.contributor.author Zandler, Melvin E. en_US
dc.contributor.author McCarty, Amy L. en_US
dc.contributor.author Itou, Mitsunari en_US
dc.contributor.author Araki, Yasuyaki en_US
dc.contributor.author Ito, Osamu en_US
dc.date.accessioned 2012-02-06T17:16:54Z
dc.date.available 2012-02-06T17:16:54Z
dc.date.issued 2004-06-30 en_US
dc.identifier 15212538 en_US
dc.identifier 7503056 en_US
dc.identifier GM 59038 en_US
dc.identifier.citation Journal of the American Chemical Society. 2004 Jun 30; 126(25): 7898-907. en_US
dc.identifier.issn 0002-7863 en_US
dc.identifier.uri http://dx.doi.org/10.1021/ja030647u en_US
dc.identifier.uri http://hdl.handle.net/10057/4363
dc.description Click on the DOI link below to access the article (may not be free). en_US
dc.description.abstract The 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.sponsorship NIGMS NIH HHS en_US
dc.format.extent 7898-907 en_US
dc.language.iso eng en_US
dc.publisher American Chemical Society en_US
dc.relation.ispartofseries Journal of the American Chemical Society en_US
dc.relation.ispartofseries J. Am. Chem. Soc. en_US
dc.source NLM en_US
dc.subject Research Support, Non-U.S. Gov't en_US
dc.subject Research Support, U.S. Gov't, Non-P.H.S. en_US
dc.subject Research Support, U.S. Gov't, P.H.S. en_US
dc.subject.mesh Aminopyrine/chemistry en_US
dc.subject.mesh Boron/chemistry en_US
dc.subject.mesh Electron Transport en_US
dc.subject.mesh Energy Transfer/radiation effects en_US
dc.subject.mesh Energy-Generating Resources en_US
dc.subject.mesh Fullerenes/chemistry en_US
dc.subject.mesh Metalloporphyrins/chemistry en_US
dc.subject.mesh Models, Biological en_US
dc.subject.mesh Photosynthesis en_US
dc.subject.mesh Spectrum Analysis en_US
dc.subject.mesh Zinc/chemistry en_US
dc.title Energy 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 complex en_US
dc.type Article en_US
dc.coverage.spacial United States en_US
dc.description.version peer reviewed en_US
dc.rights.holder Copyright © 2004 American Chemical Society en_US

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