The light emission properties of the azulene molecule and several alkylhyphen;substituted azulenes have been studied. In confirmation of recent results of Beer and Longuethyphen;Higgins, it is found that anomalous (SPrime;rarr;S) fluorescence occurs in azulene, withvmacr;maxat 26 802 cmmdash;1(rigid glass solution in EPA at 77deg;K). Redhyphen;shifts for this fluorescence are found in several alkylhyphen;substituted azulenes, in qualitative agreement with substitution theory. The absence of normal (Sprime;rarr;S) fluorescence and the absence of any phosphorescence (Trarr;S) emission to 11 000 A, the apparatus limit, are also confirmed. The emission observations are discussed, and alternative interpretations are given.
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