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dc.contributor.authorEl-Khouly, Mohamed E.
dc.contributor.authorWijesinghe, Channa A.
dc.contributor.authorNesterov, Vladimir N.
dc.contributor.authorZandler, Melvin E.
dc.contributor.authorFukuzumi, Shunichi
dc.contributor.authorD'Souza, Francis
dc.identifier.citationEl-Khouly, Mohamed E.; Wijesinghe, Channa A.; Nesterov, Vladimir N.; Zandler, Melvin E.; Fukuzumi, Shunichi; D'Souza, Francis. 2012. Ultrafast photoinduced energy and electron transfer in multi-modular donor-acceptor conjugates. Chemistry-A European Journal, v.18 no.43 pp.13844-13853en_US
dc.identifier.citationEl-Khouly, M. E., Wijesinghe, C. A., Nesterov, V. N., Zandler, M. E., Fukuzumi, S. and D'Souza, F. (2012), Ultrafast Photoinduced Energy and Electron Transfer in Multi-Modular Donor–Acceptor Conjugates. Chem. Eur. J., 18: 13844–13853. doi: 10.1002/chem.201202265
dc.descriptionClick on the DOI link to access the article (may not be free).en_US
dc.description.abstractNew multi-modular donoracceptor conjugates featuring zinc porphyrin (ZnP), catechol-chelated boron dipyrrin (BDP), triphenylamine (TPA) and fullerene (C60), or naphthalenediimide (NDI) have been newly designed and synthesized as photosynthetic antenna and reaction-center mimics. The X-ray structure of triphenylamine-BDP is also reported. The wide-band capturing polyad revealed ultrafast energy-transfer (kENT=1.0x1012 s-1) from the singlet excited BDP to the covalently linked ZnP owing to close proximity and favorable orientation of the entities. Introducing either fullerene or naphthalenediimide electron acceptors to the TPA-BDP-ZnP triad through metalligand axial coordination resulted in electron donoracceptor polyads whose structures were revealed by spectroscopic, electrochemical and computational studies. Excitation of the electron donor, zinc porphyrin resulted in rapid electron-transfer to coordinated fullerene or naphthalenediimide yielding charge separated ion-pair species. The measured electron transfer rate constants from femtosecond transient spectral technique in non-polar toluene were in the range of 5.0x1093.5x1010 s-1. Stabilization of the charge-separated state in these multi-modular donoracceptor polyads is also observed to certain level.en_US
dc.relation.ispartofseriesChemistry-A European Journal;v.18 no.43
dc.subjectdonor-acceptor systemsen_US
dc.subjectelectron transferen_US
dc.subjectenergy transferen_US
dc.subjectartificial photosynthesisen_US
dc.titleUltrafast photoinduced energy and electron transfer in multi-modular donor-acceptor conjugatesen_US
dc.description.versionPeer reviewed
dc.rights.holderCopyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

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