Study of excitation energy migration and transfer in 3,3'-dimethyloxacarbocyanine iodide (DMOCI) and o-(6-diethylamino-3-diethylimino-3H-xanthen-9-yl) benzoic acid (RB) in thin films of polyvinyl alcohol

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TitleStudy of excitation energy migration and transfer in 3,3'-dimethyloxacarbocyanine iodide (DMOCI) and o-(6-diethylamino-3-diethylimino-3H-xanthen-9-yl) benzoic acid (RB) in thin films of polyvinyl alcohol
Publication TypeJournal Article
Year of Publication2004
AuthorsTripathy, U, Bisht, PB, Pandey, KK
JournalChemical PhysicsChemical Physics
Volume299
Pagination105-112
Date PublishedMar
ISBN Number0301-0104
Accession NumberISI:000220129400014
AbstractExcitation energy migration and transfer study in a new dye pair 3,3'-dimethyloxacarbocyanine iodide (DMOCI) (donor) to o-(6-diethylamino-3-diethylimino-3H-xanthen-9-yl) benzoic acid (RB) (acceptor) has been carried out in thin films of polyvinyl alcohol (PVA) by steady state and ps time-resolved spectroscopy. It is found that at low donor and high acceptor concentration the Forster type (non-radiative) energy transfer takes place directly from donor to acceptor, whereas in case of low acceptor concentrations the excitation energy migration through donor-donor interaction dominates over the direct donor-acceptor transfer. The observed behaviour has been explained on the basis of theoretical models of Loring, Anderson and Fayer (LAF) and Huber. (C) 2004 Elsevier B.V. All rights reserved.