The problem of triplet self-quenching in thioketone photochemistry

Ramesh, V. ; Ramnath, N. ; Ramamurthy, V. (1983) The problem of triplet self-quenching in thioketone photochemistry Journal of Photochemistry, 23 (2). pp. 141-148. ISSN 0047-2670

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The highly efficient quenching of the thioketone triplet state by ground state thioketones with various electronic and structural features was investigated by means of phosphorescence quenching measurements in a number of solvents. Electron-withdrawing groups conjugated to the thioketone chromophore and steric crowding around the lone pair of electrons on the sulphur atom tend to decrease the quenching rate. The ground state thioketone quencher acts as the donor and the excited thioketone phosphorescer acts as the acceptor in the quenching process. Possible involvement of triplet excimers was investigated but no excimer or heteroexcimer emission was observed.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:90023
Deposited On:04 May 2012 05:15
Last Modified:04 May 2012 05:15

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