Photoisomerization dynamics of alkyl-substituted stilbenes in supersonic jets

Klaus Rademann*, Uzi Even, Shiomo Rozen, Joshua Jortner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We report time-resolved fluorescence decay lifetimes from photoselected states of jet-cooled 4-ethyl-trans-stilbene (4ETS) and 4-n-propyl-trans-stilbene (4PTS) in the energy range Ev = 0-2800 cm-1 above the S1 origin. Alkyl substitution enhances the non-radiative decay rates. These data can be fitted by the statistical RRKM theory in conjunction with the reduction of the photoisomerization threshold from Et = 1300±50 cm-1 for trans-stilbene to Et = 1100±100cm-1 for 4ETS, and Et = 1000±100 cm-1 for 4PTS.

Original languageEnglish
Pages (from-to)5-11
Number of pages7
JournalChemical Physics Letters
Issue number1
StatePublished - 21 Mar 1986


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