Photodynamics, picosecond

The time and wavelength resolved fluorescence dynamics of bianthryl has been investigated by several groups [30, 82, 132, 133, 115, 116]. In addition, this molecule has been studied by picosecond absorption spectroscopy [115], electric field induced fluorescence anisotropy measurements [117] and optically induced dielectric absorption (microwave) measurements [118, 119]. The results are generally in accord with the theoretical model presented in Sections III.A and III.B. One of the challenges of studying the photodynamics of BA is that the LE and CT interconversion is so rapid (i.e., on the time scale of solvation) that it is necessary to employ ultraviolet subpicosecond and even femtosecond fluorescence spectroscopy which has only recently become available [30, 82, 132, 133]. 

We summarize here two time-resolved spectroscopic methods, giving direct information on picosecond and nanosecond photodynamics of solid surface. One is a fluorescence spectroscopy which analyzes fluorescence behavior of the surface area excited by the evanescent laser pulse. The other is to get transient UV-visible absorption spectra by using the evanescent light as a probe beam. 

PICOSECOND PHOTODYNAMICS OF THE EXCITED STATES OF ORGANIC COMPOUNDS IN SOLUTION USING TIME RESOLVED SPECTROSCOPY... 

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