The 9-anthryl and 9-anthrylmethyl groups and their 10-methyl derivatives have been used to form quaternary salts of some pyridines and N-methylimidazole. The imidazolium compounds exhibit normal anthracenic fluorescence but the pyridinium materials show efficient intramolecular quenching. An electron transfer mechanism is advanced which accounts for these phenomena.
G. M. Blackburn, G. Lockwood and V. Solan, J. Chem. Soc., Perkin Trans. 2, 1976, 1452 DOI: 10.1039/P29760001452
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