A stochastic model for interpreting the dual fluorescence emission of dimethyl-aminobenzonitrile is presented, which takes into account the conformational dynamics of the singlet state S1, the emission dynamics to the ground state S0 and the relaxation of the polar solvent. The probability density for the population of the excited state is determined by solving numerically a bidimensional diffusive operator for a torsional variable of the molecule coupled to a solvent coordinate, with source and sink terms. The resulting diffusion equation is the continuous analogue of the well known Grabowski kinetic scheme. The fluorescence emission is evaluated by integrating over the microscopic coordinates at each emission frequency.
A stochastic model ffor dual fluorescence of DMABN in polar media
NORDIO, PIER LUIGI;POLIMENO, ANTONINO;BARBON, ANTONIO
1993
Abstract
A stochastic model for interpreting the dual fluorescence emission of dimethyl-aminobenzonitrile is presented, which takes into account the conformational dynamics of the singlet state S1, the emission dynamics to the ground state S0 and the relaxation of the polar solvent. The probability density for the population of the excited state is determined by solving numerically a bidimensional diffusive operator for a torsional variable of the molecule coupled to a solvent coordinate, with source and sink terms. The resulting diffusion equation is the continuous analogue of the well known Grabowski kinetic scheme. The fluorescence emission is evaluated by integrating over the microscopic coordinates at each emission frequency.
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