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Dynamics of the second excited singlet state of thiophosgene in solution

✍ Scribed by K.J. Falk; S.E. Sveinson; R.P. Steer

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 376 KB
Volume: 163
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(89)85174-7

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✦ Synopsis

The dynamic behavior of the second excited singlet state of QCS has been investigated for the first time in liquid solutions. In perfluoroalkane solvents strong B-ji. fluorescence (@f up to 0.077) 1s observed when the molecule is excited to bound vibrational states. s lifetimes of up 10 2.8 ns are obtained. Dissociation, either directly (in competition with vibrational relaxation) at high vibrational energies or indirectly by solvent activation when low vibrational levels are initially populated, appears to be the mam radiationless decay path. Fluorescence is much weaker in other solvents. A rate constant of 9.5 X IO9 M-' s-is measured for quenching by n-hexane.

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