Abstract
The luminescence spectra and the time response of the luminescence of the colored form of furylfulgide dispersed in a polymer film were measured for various concentrations. The infrared spectra of furylfulgide were also measured in order to elucidate the vibrational mode relevant to the decay of the luminescence. We found that the luminescence spectrum at low concentration consists of at least three luminescence bands and that the decay time of the highest energy luminescence band is three times larger than that of the lowest energy luminescence band. These results are explained in terms of the non-radiative transition model by Gutsche. The frequency of the vibrational mode relevant to the non-radiative decay process and the minimum energy distance between the excited state and the ground state of the colored form of the fulgide are also estimated by the same model.
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