AN ALGORITHM FOR ANALYZING THE POLARIZATION-FREE PICOSECOND FLUORESCENCE EXPERIMENTS ON TICT, CT, PT AND OTHER RELEVANT SYSTEMS IN SOLUTIONS

An algorithm for analyzing the picosecond fluorescence decays of TICT, CT, PT and other relevant two-excited state systems in solutions, is presented. This algorithm enables for: (a) separation of fluorescence decays of the transient state (TICT, CT or PT) and the decay of the pr imary excited state, both contributing to the measured fluorescence de cay at the same emission wavelength, (b) separation of the steady-stat e emission bands, (c) determination of the quantum yields for both sta tes, (d) determination of the radiative fluorescence lifetimes, the ra tes for non-radiative processes, the rates for forward and backward ki netic relaxation as well as the activation energies of the relaxation processes involved. Experimental examples for some CT, TICT and PT com pounds, are discussed.