PICOSECOND FLUORESCENCE KINETICS OF N-ALL-TRANS-RETINYLIDENE-N-BUTYLAMINE
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Fluorescence lifetimes are reported for Nalltransretinylidenenbutylamine in hexane. Picosecond resolution was obtained by excitation with a single 355nm pulse, 25 ps FWHM, from a passive modelocked YAGlaser and detection with a high speed streak camera. The lifetime dependence on temperature and the spectral characteristics support a vibrationaltorsional deactivation model of the singlet excited state of two different conformers. Additional data in decalin are consistent with this model, while the quenching in alcoholic solutions may be supported by the solvent reorientation. Copyright 1982, Wiley Blackwell. All rights reserved