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Laser-induced fluorescence of jet-cooled 7-diethylamino-4-trifluoromethyl coumarin

โœ Scribed by A.G. Taylor; W.G. Bouwman; A.C. Jones; C. Guo; D. Phillips

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
345 KB
Volume
145
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

Laser-induced fluorescence excitation and emission spectra of 7-diethylamino-4-trifluoromethyl coumarin (Cl 52A) cooled in a supersonic expansion of helium are reported. The lowest observed excitation band is assigned as the vibrationless. 0: transition in disagreement with a previous assignment. The present assignment is consistent with a Franck-Condon simulation of the spectral intensities. No evidence was found for the formation of a twisted intramolecular charge transfer (TICT) state by the isolated jet-cooled molecule.

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