Abstract
AbstractFluorescence lifetimes are reported for N‐all‐trans‐retinylidene‐n‐butylamine in hexane. Picosecond resolution was obtained by excitation with a single 355‐nm pulse, 25 ps FWHM, from a passive mode‐locked YAG‐laser and detection with a high speed streak camera. The lifetime dependence on temperature and the spectral characteristics support a vibrational‐torsional 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.
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