Energy transfer, excited-state deactivation, and exciplex formation in artificial caroteno-phthalocyanine light-harvesting antennas

R. Berera, I.H.M. van Stokkum, G. Kodis, A.E. Keirstead, S. Pillai, C. Herrero, R.E. Palacios, M. Vengris, R. van Grondelle, D. Gust, T.A. Moore, A.L. Moore, J.T.M. Kennis

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Abstract

We present results from transient absorption spectroscopy on a series of artificial light-harvesting dyads made up of a zinc phthalocyanine (Pc) covalently linked to carotenoids with 9, 10, or 11 conjugated carbon-carbon double bonds, referred to as dyads 1, 2, and 3, respectively. We assessed the energy transfer and excited-state deactivation pathways following excitation of the strongly allowed carotenoid 82 state as a function of the conjugation length. The 82 state rapidly relaxes to the S* and Si states. In all systems we detected a new pathway of energy deactivation within the carotenoid manifold in which the S* state acts as an intermediate state in the 8
Original languageEnglish
Pages (from-to)6868-6877
JournalJournal of Physical Chemistry B
Volume111
Issue number24
DOIs
Publication statusPublished - 2007

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Energy transfer, excited-state deactivation, and exciplex formation in artificial caroteno-phthalocyanine light-harvesting antennas

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