Evidence for mode-specific intramolecular vibrational redistribution in S1 p-difluorobenzene

Scott H. Kable, Warren D. Lawrance, Alan E.W. Knight

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26 Citations (Scopus)


The extent of intramolecular vibrational redistribution (IVR) occurring within the fluorescence lifetime of S1 p-difluorobenzene has been measured with single vibronic level fluorescence spectroscopy for the levels 0°, 61, 51, 51301, 51302, 31, 52, 52301, 52302, and 3151. We find that S1 levels involving one or more quanta of excitation in v30 undergo IVR to a greater extent than those with no excitation in v30. We conclude that vibrational excitation in the out-of-plane mode v30 enhances IVR and we postulate that this may be a consequence of a pseudo-double minimum potential associated with displacement in v30.

Original languageEnglish
Pages (from-to)1244-1247
Number of pages4
JournalJournal of Physical Chemistry
Issue number8
Publication statusPublished - 1982
Externally publishedYes


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