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Picosecond isomerisation kinetics of excited p-dimethylaminobenzonitriles studied by oxygen quenching of fluorescence

✍ Scribed by Krystyna Rotkiewicz; Zbigniew R. Grabowski; Jan Jasny

Publisher
Elsevier Science
Year
1975
Tongue
English
Weight
404 KB
Volume
34
Category
Article
ISSN
0009-2614

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✦ Synopsis

Fluorescence quenching v,ith O2 under high pressure ~2s used for the study of reaction kinetics in the 10 picosecond region. Quenching of the dual fluorescence of 2-methyl4dimethylaminohenzonitrile (II) in acetonirrile was analysed. The process B* 4 A* occurs with a n lifetime of 11 ps, rvhile the solvent reorientation correlation time is only 1 ps. lvhich supports the isomeri=tion mechanism which involves twisting the amino group. The lifetime of A* is 4.5 ns.

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