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dc.contributorWichita State University. Department of Chemistryen_US
dc.contributor.authorD'Souza, Francisen_US
dc.contributor.authorMaligaspe, Erandaen_US
dc.contributor.authorSandanayaka, Atula S. D.en_US
dc.contributor.authorSubbaiyan, Navaneetha K.en_US
dc.contributor.authorKarr, Paul A.en_US
dc.contributor.authorHasobe, Takuen_US
dc.contributor.authorIto, Osamuen_US
dc.identifier.citationThe journal of physical chemistry. A. 2010 Oct 21; 114(41): 10951-9.en_US
dc.descriptionClick on the DOI link below to access the article (may not be free).en_US
dc.description.abstractSelf-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.publisherAmerican Chemical Societyen_US
dc.relation.ispartofseriesThe journal of physical chemistry. Aen_US
dc.relation.ispartofseriesJ Phys Chem Aen_US
dc.titlePhotochemical charge separation in supramolecular phthalocyanine-multifullerene conjugates assembled by crown ether-alkyl ammonium cation interactionsen_US
dc.coverage.spacialUnited Statesen_US
dc.description.versionpeer revieweden_US
dc.rights.holderCopyright © 2010 American Chemical Societyen_US

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