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Temperature dependence of the fluorescence lifetime and quantum yield of pseudoisocyanine monomers

✍ Scribed by Hans-Peter Dorn; Alexander Müller

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
464 KB
Volume
130
Category
Article
ISSN
0009-2614

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✦ Synopsis

Fluorescence intensities and lifetimes of 1, I '-diethyl-2,2'-cyanine chloride( pseudoisocyanine) at I .O x 1 O-* M in glycerol have been measured in the temperature range 84-298 K. Comparison with previous results

shows that the solution consists of dye monomers. Arrhenius plots yield two activation energies for internal conversion: 2247.7 and 334.7 cm-'. Fluorescence quantum yields, evaluated from measured lifetimes and T,,= 3.7 ns, are between 2.6% (298 K) and 47.5% (84 K).

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