Determination of the relaxation characteristics for solvents from non-stationary spectra: the role of the gating pulse duration

The previously developed approach to the analysis of experimental spectra non-stationary fluorescence has been improved by taking into account effect duration gating pulse and a more accurate description initial stage solvent relaxation. exponential function used describe inertial component relaxation replaced Gaussian function. This explicitly takes reorganization intramolecular vibrations. It includes an explicit wave packet formation in excited state fluorophore. improvement made it possible refine characteristics number solvents: ethylene glycol, dimethyl sulfoxide, butyronitrile, ethyl acetate, diethyl ether, dipropyl ether. Keywords: nonequilibrium nuclear subsystem, Stokes shift, vibrations,