Title: Fluorescence Quenching of Naphthalene and Its Derivatives by Acetyl Chloride
Abstract: Abstract The fluorescence of naphthalene and its methyl or methoxy derivatives has been found to be quenched by acetyl chloride. The quenching constants, determined by the Stern-Volmer treatment of the emission intensity and lifetime have been found to be in good agreement within experimental error. The quenching rate constants have been correlated with the energy terms of electron-donating forces in the excited states of these naphthalenes. The results suggest that the quenching mechanism involves a charge-transfer stabilized complex, in which the excited naphthyl compounds act as donors. Exciplex formation has been supported by oxygen quenching experiments.