Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
ISSN-L : 0366-7022
TEMPERATURE EFFECT ON THE INTERSYSTEM CROSSING OF ACRIDINE IN VARIOUS SOLVENTS
Koji Uji-IeKunihiko KasamaKoichi KikuchiHiroshi Kokubun
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1978 Volume 7 Issue 3 Pages 247-250

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Abstract

lative yield of the lowest triplet state of acridine increases with increasing temperature in water, ethanol, and isopropanol, but decreases in methylmethacrylate (MMA) and polymethylmethacrylate (PMMA). In benzene it remains constant in the range of 278 to 336 K. The lowest excited singlet state is of π,π* character in all the solvents studied. The energy gap between the singlet π,π* and n,π* states is larger in the order of water>alcohols>MMA, PMMA and benzene. The intersystem crossing through the singlet n,π* state becomes less singnificant for larger energy gap.

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