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Photochemical charge separation in supramolecular phthalocyanine-multifullerene conjugates assembled by crown ether-alkyl ammonium cation interactions

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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 Maligaspe, Eranda en_US
dc.contributor.author Sandanayaka, Atula S. D. en_US
dc.contributor.author Subbaiyan, Navaneetha K. en_US
dc.contributor.author Karr, Paul A. en_US
dc.contributor.author Hasobe, Taku en_US
dc.contributor.author Ito, Osamu en_US
dc.date.accessioned 2012-02-06T17:15:47Z
dc.date.available 2012-02-06T17:15:47Z
dc.date.issued 2010-10-21 en_US
dc.identifier 20863094 en_US
dc.identifier 9890903 en_US
dc.identifier.citation The journal of physical chemistry. A. 2010 Oct 21; 114(41): 10951-9. en_US
dc.identifier.issn 1520-5215 en_US
dc.identifier.issn 1089-5639 en_US
dc.identifier.uri http://dx.doi.org/10.1021/jp1028195 en_US
dc.identifier.uri http://hdl.handle.net/10057/4262
dc.description Click on the DOI link below to access the article (may not be free). en_US
dc.description.abstract Self-assembled phthalocyanine-multifullerene donor-acceptor conjugates have been formed by crown ether-ammonium cation dipole-ion binding strategy to probe the photochemical charge separation. To achieve this, phthalocyanine is functionalized to possess four 18-crown-6 moieties on the macrocycle periphery, whereas fullerene is functionalized to possess an alkyl ammonium cation of short and long chain lengths. Stable donor-acceptor conjugates accommodating multifullerene entities have been obtained by the crown ether-ammonium cation inclusion complexation. From the efficient fluorescence quenching of the zinc phthalocyanine by the bound fullerene entities, the rate constants of charge separation are evaluated to be slightly larger for closely held via shorter alkyl chain length fullerene, which are also larger compared to the earlier reported analogous zinc porphyrin-multifullerene conjugate. Nanosecond transient absorption studies yielded spectral signatures corresponding to both the phthalocyanine radical cation and fullerene radical anion at the same time, providing evidence of light-induced electron transfer within the conjugates. The evaluated lifetimes of the radical ion pairs in the present phthalocyanine-fullerene conjugates are found to be hundreds of nanoseconds and are much longer compared to the earlier reported conjugate of zinc porphyrin analogue, revealing higher possible usage of the generated radical ion pairs. en_US
dc.format.extent 10951-9 en_US
dc.language.iso eng en_US
dc.publisher American Chemical Society en_US
dc.relation.ispartofseries The journal of physical chemistry. A en_US
dc.relation.ispartofseries J Phys Chem A en_US
dc.source NLM en_US
dc.title Photochemical charge separation in supramolecular phthalocyanine-multifullerene conjugates assembled by crown ether-alkyl ammonium cation interactions 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 © 2010 American Chemical Society en_US

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