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dc.contributorWichita State University. Department of Chemistryen_US
dc.contributor.authorSchumacher, Amy Leaen_US
dc.contributor.authorSandanayaka, Atula S. D.en_US
dc.contributor.authorHill, Jonathan P.en_US
dc.contributor.authorAriga, Katsuhikoen_US
dc.contributor.authorKarr, Paul A.en_US
dc.contributor.authorAraki, Yasuyakien_US
dc.contributor.authorIto, Osamuen_US
dc.contributor.authorD'Souza, Francisen_US
dc.date.accessioned2012-02-06T17:16:02Z
dc.date.available2012-02-06T17:16:02Z
dc.date.issued2007-01-01en_US
dc.identifier17385764en_US
dc.identifier9513783en_US
dc.identifier.citationChemistry (Weinheim an der Bergstrasse, Germany). 2007; 13(16): 4628-35.en_US
dc.identifier.issn0947-6539en_US
dc.identifier.urihttp://dx.doi.org/10.1002/chem.200601854en_US
dc.identifier.urihttp://hdl.handle.net/10057/4297
dc.descriptionClick on the DOI link below to access the article (may not be free).en_US
dc.description.abstractBy adopting a "covalent-coordinate" bonding approach, novel supramolecular pentad and triad molecules composed of zinc-porphyrin(s), fullerene(s), and oxoporphyrinogen redox-/photoactive entities have been constructed, and also characterized by means of spectral and electrochemical techniques. The geometry and electronic structures of the pentad and the triad were deduced by means of DFT calculations. Free-energy calculations suggested that the photoinduced electron/energy transfer from the zinc-porphyrin (ZnP) singlet-excited state to the imidazole modified fullerene (ImC(60)) acceptor and oxoporphyrinogen (OxP) entities is feasible for both the triad and the pentad. The charge-separation rates (k(CS)) determined from picosecond time-resolved emission studies were higher for pentad (C(60)Im:ZnP)(2)-OxP than for the corresponding triad, C(60)Im:ZnP-OxP. A comparison of the k(CS) values previously reported for the covalently linked bis(zinc-porphyrin)-oxoporphyrinogen triad suggests that employing a fullerene acceptor improves the electron-transfer rates. Nanosecond transient absorption studies provide evidence for the occurrence of electron-transfer processes. Lifetimes of the radical ion pairs (tau(RIP)) are in the range of hundreds of nanoseconds, which indicates that there is charge stabilization in the supramolecular systems.en_US
dc.format.extent4628-35en_US
dc.language.isoengen_US
dc.publisherJohn Wiley and Sonsen_US
dc.relation.ispartofseriesChemistry (Weinheim an der Bergstrasse, Germany)en_US
dc.relation.ispartofseriesChemistryen_US
dc.sourceNLMen_US
dc.subjectResearch Support, Non-U.S. Gov'ten_US
dc.subjectResearch Support, U.S. Gov't, Non-P.H.S.en_US
dc.subject.meshElectrochemistryen_US
dc.subject.meshElectronsen_US
dc.subject.meshFullerenes/chemistryen_US
dc.subject.meshMacromolecular Substances/chemistryen_US
dc.subject.meshMagnetic Resonance Spectroscopy/instrumentationen_US
dc.subject.meshModels, Chemicalen_US
dc.subject.meshMolecular Structureen_US
dc.subject.meshPhotochemistryen_US
dc.subject.meshPorphyrinogens/chemistryen_US
dc.subject.meshPorphyrins/chemistryen_US
dc.subject.meshSensitivity and Specificityen_US
dc.subject.meshSpectrometry, Fluorescence/methodsen_US
dc.subject.meshSpectrophotometry, Ultraviolet/methodsen_US
dc.subject.meshTime Factorsen_US
dc.subject.meshZinc/chemistryen_US
dc.subject.meshMagnetic Resonance Spectroscopy/methodsen_US
dc.titleSupramolecular triad and pentad composed of zinc-porphyrin(s), oxoporphyrinogen, and fullerene(s): design and electron-transfer studiesen_US
dc.typeArticleen_US
dc.coverage.spacialGermanyen_US
dc.description.versionpeer revieweden_US
dc.rights.holderCopyright © 2007 WILEY-VCH Verlag GmbH & Co.en_US


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