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Time Resolved Resonance Raman Study of S1 cis-Stilbene and its Deuterated Isotopomers

We present the picosecond time-resolved resonance Raman (ps-TR3) spectra of the first excited singlet state (S1) of cis-stilbene (d0), fully deuterated cis-stilbene (d12) and  - ’ -d2-cis-stilbene (d2) measured in n-hexane at pump and probe wavelengths 267 and 630 nm, respectively. The main observation is that in the lower wavenumber region the spectra are dominated by a 2nd order overtone progression originating from a 229 cm-1 fundamental band for the S1 d0 cis-stilbene. The observed low-wavenumber modes of the excited cis-stilbene are substantially more resonantly enhanced than the modes around 1600 cm-1.

cis-stilbene; Raman spectroscopy; excited state

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