Triplet-triplet and singlet-singlet energy-transfer studies between t-stilbene and 7-aminocoumarin laser dyes

Priyadarsini, K. I. ; Mittal, J. P. ; Naik, D. B. ; Moorthy, P. N. (1991) Triplet-triplet and singlet-singlet energy-transfer studies between t-stilbene and 7-aminocoumarin laser dyes Journal of the Chemical Society, Faraday Transactions, 87 (2). pp. 269-272. ISSN 0956-5000

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Official URL: http://pubs.rsc.org/en/Content/ArticleLanding/1991...

Related URL: http://dx.doi.org/10.1039/FT9918700269

Abstract

Singlet-singlet and triplet-triplet energy-transfer processes between t-stilbene and 7-aminocoumarin dyes, viz. C 1, C 102, C 1F and C 153, have been studied. Singlet-singlet energy-transfer rate constants and critical transfer distances claculated for t-stilbene and coumarins suggest that they take place via a long-range coulombic mechanism. The triplet-triplet energy-transfer studies carried out by pulse radiolysis suggest that they take place via an exchange mechanism.

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