Photoisomerization of stilbene in low viscosity solvents: Comparison of isolated and solvated molecules

Articles you may be interested in Barrier crossing and solvation dynamics in polar solvents: Photoisomerization of transstilbene and E,E diphenylbutadiene in compressed alkanols Viscosity and solvent dependence of lowbarrier processes: Photoisomerization of cisstilbene in compressed liquid solvents Unimolecular reactions in isolated and collisional systems: Deuterium isotope effect in the photoisomerization of stilbene The photoisom~rization .of stilbene has been studied in low viscosity liquid alkanes and in the gas ph~e. The bamer cross1Og process shows no evidence of a low-friction or energy controlled regton e~en at the lowest liquid visc~siti~s studied. We present evidence that the barrier crossing may be 10 the energy controlled regton 10 the thermal vapor. We discuss the influence of intramolecular.vibrati~nal energ! transfe~ on the observed dynamics and note that entropy effects should be conSIdered 10 companng expenmental data with theoretical models.