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Intramolecular vibrational relaxation and excitation energy dependence of fluorescence in dilute vapors of tetracene and pentacene

โœ Scribed by Shigeo Okajima; E.C. Lim

Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
569 KB
Volume
37
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

Excitation energy dependences of fluorescence (lifetime and quantum yield) in diktc vapors of tetracene and pentacene show evidence of intramolecu~r vibrational refasaticn which competes with electronic relaxation. The results imply that intramolecuhr vibrational energy redistribution is 3 fast process compared with etcctronic relaxation for aromatic molecules with large excess vibrational energies.

The assumption of rapid vibratior.sI randomization

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The vibrational energy relaxation (VER) of polyatomic molecules has been the central issue in many of the chemical reactions in condensed phase [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] as well as in gas phase . The vibrational energy introduced to the molecule is immediately redis