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Decay of the fluorescence anisotropy from isolated stilbene molecules

✍ Scribed by D.K. Negus; D.S. Green; R.M. Hochstrasser

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
457 KB
Volume
117
Category
Article
ISSN
0009-2614

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✦ Synopsis

The fluorescence amsotropy of trans-sldbene molecules. free from dhsions. decays on the picosecond umcscale. This resulr is dirccl evidence for the occurrence of extensive vibralion-rotation inleraclions in a speclral regime where no spectral slructure is observable. The anisouopy al Lime zero of O-1 kO.01 decays in approximately 18 ps IO a value of 0.05&0.01. WC suggest this is caused WI part by redistnbution of the initially created vibronic exclnation The calculn~ed value of the arnsotropy for slilbene. consrdered a regular rotor, IS 0.078 -srgnrkantly less than the measured value

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