Photoisomerization Paths of α,ω-Diphenylpolyenes: Reaction Rate Dependence on Temperature, Excitation Wavelength, and Deuteration.

ABSTRACT: The photoisomerization rate k_iso of trans-stilbene (tS) and trans-trans-diphenylbutadiene (ttD) is studied in solution and compared to that in jet/gas. Rice-Ramsperger-Kassel-Marcus (RRKM) theory correctly predicts the tS rate in jet, k_RRKM = A_mexp(-E_in/kT_m) with E_in = 1398 cm^-1, and A_m = 1.8 ps^-1 corresponding to frequency ν_iso = 60 cm^-1 of the reactive mode, T_m being the molecular temperature. However, the behavior in solution cannot be explained by the RRKM rate alone. In solution the rate k_iso = A_Sexp(-E_b/kT_S) has a simil

SUBMITTER: Dobryakov AL 

PROVIDER: S-EPMC11613511 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature