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Fluorescence from the second excited singlet state of [18] annulenes

โœ Scribed by Urs P. Wild; Hans J. Griesser; Vo Dinh Tuan; Jean F.M. Oth

Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
538 KB
Volume
41
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

The emission spectra of the second excited singlet state of [ 181 annukne and of monofluoro [ 181 annulene (m a 3methylpentanc glass at 4 K) are reported. The large ener,7 gap between the fist and second excited singlet states inhibits fast internal cogversion and favours the appearance of S2 + So emission. In addition, fluorescence from the S1 state can be observed in monofluoro [ 131 annulene by exciting into the Sz or directly into the S 1 absorption.

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