Abstract
Picosecond time-resolved resonance Raman (TR3) spectrum with ∼1 ps lifetime has been observed when probing under intense transient S1cis-stilbene absorption band at 630 nm and photoexciting at 267 nm. The spectrum, ascribed to S1cis-stilbene, is notable for high intensity of low-frequency bands (243, 475 and 742 cm-1).
Highlights
Picosecond time-resolved resonance Raman (TR3) spectrum with ps lifetime has been observed when probing under intense transient S cis-stilbene absorption band at 630 nm and photoexciting at 267 nm
$1 cis-stilbene isomerisation is near barrierless and occurs on ps timescale competing with vibrational relaxation process
Successful modelling of reaction dynamics require a detailed knowledge of the molecular structure of the S1 state
Summary
Picosecond time-resolved resonance Raman (TR3) spectrum with ps lifetime has been observed when probing under intense transient S cis-stilbene absorption band at 630 nm and photoexciting at 267 nm. The spectrum, ascribed to S cis-stilbene, is notable for high intensity of low-frequency bands (243, 475 and 742cm-1). Keywords." Cis-stilbene; resonance Raman; time-resolved; picosecond; photoexcited Stilbene plays an important role as a model system for isomerisation dynamics. Trans and cis, undergo fast isomerisation in solution following photoexcitation to the first excited electronic state.
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