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Time-resolved resonance Raman spectra of the triplet state and the radical cation of 5-dibenzosuberenol and its photoionization mechanism by Jiro Abe; Noboru Kunimatsu; Atsuhiko Shimojima; Hiroaki Takahashi is a Physics and Astronomy article available to read on EtoBox.

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Time-resolved resonance Raman spectra are obtained for the lowest excited triplet state T, and the radical cation of 5-dibenzosuberenol (DBCH-5-01). It is concluded, based on the large downshifts of the Raman bands assignable to the C=C stretch of the central ring, that the C=C bond is weakened markedly both in the T, state and in the radical cation; the weakening is much more pronounced in the T, state. Dependence on the intensity and wavelength of the pump laser pulse indicates that the production of the radical cation is biphotonic via the S, state and that the intersystem crossing from S, to T, is much slower from low vibrational levels than from higher vibrational levels, resulting in the very small yield of the T, state when photolysed by 340 nm UV light.

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Author

Jiro Abe; Noboru Kunimatsu; Atsuhiko Shimojima; Hiroaki Takahashi

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0009-2614)

Published

1991

Language

EN

Field

Physics and Astronomy (Physical Sciences)