Abstract
A series of ring-substituted phthalocyanines possessing high solubilities in many solvents have been synthesized and their quantum yield and lifetime of fluorescence measured. The relation between fluorescent properties and structural factors, i.e. the central metal ions and the substituents, is summarized. It is found that the fluorescence quantum yield is related to both the central ion and the substituent, whilst the lifetime of fluorescence depends mainly on the central ion and is, generally speaking, independent of the substituent.
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