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Molecular geometry and excited electronic states. Theoretic study on the molecular geometry and the fluorescence lifetime difference of isometric phenylnapkthalenes

✍ Scribed by Klaus Gustav; Ulrich Kempka; Jürgen Sühnel

Publisher
Elsevier Science
Year
1980
Tongue
English
Weight
267 KB
Volume
71
Category
Article
ISSN
0009-2614

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✦ Synopsis

The equlbnum molecular geometries of 1-phenyl-and 2-phenyl-naphthaknes in the electronic So and S1 states hake been calculnred by muumiz ation of the total enera with respect to all molecular coordmates. The singlet term systems of both isomers have txen determined usmg these results. Although rhe fluorescence U-XUISI~IO~ en=rgy is XXXIY the -CZ m both cases 11 was found that tie correspondmg electronic uansitxons v.ere allowed m I-phenylnaphthalene but were forbidden m bphenylnaphthalene. The result e\plnins the dtiferent fluorescence lifetunes observed.

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