Ann-Kathrin Holm, M. Rini, E. Nibbering
Jul 17, 2003
Citations
0
Influential Citations
34
Citations
Journal
Chemical Physics Letters
Abstract
Abstract The ring-opening reaction of 1 ′ ,3 ′ -dihydro-1 ′ ,3 ′ ,3 ′ -trimethyl-6-nitrospiro[2H-1-benzopyran-2,2 ′ -(2H)-indole] is investigated in two solvents, by probing the evolution of the vibrational absorption spectrum with 130 fs time-resolution. Competition between internal conversion and photochemistry is found to depend on the solvent. The internal conversion quantum yield is determined to be 0.63 in perdeuterated acetonitrile and 0.34 in tetrachloroethene. Based on spectral features and biexponential kinetics, the formation of an additional merocyanine isomer in tetrachloroethene is concluded.