Ultrafast Excited State Deactivation of Triphenylmethane Dyes

摘要: We have carried out ultrafast pump−probe measurement of four TPM dyes, malachite green (MG), brilliant (BG), crystal violet (CV), and ethyl (EV), with a time resolution 30 fs. The signal showed that solvent dependence arose first in the femtosecond regime, e.g., decay n-butanol solution was clearly slower than methanol just 50 fs after initial photoexcitation. decays multiexponential manner components stronger linear on viscosity did faster components. also temperature-dependent ethanol calculated activation energies from Arrhenius plots each effective volumes were larger for decays. energy dyes. These observations are explained combined effect microviscosity intramolecu...