title: Fluorescence intensities and lifetimes of aromatic hydrocarbons in cyclohexane solution: evidence of contact charge-transfer interactions with oxygen.
abstract: The fluorescence lifetimes and intensities of naphthalene, phenanthrene, chrysene, and pyrene were measured as a function of oxygen concentration in cyclohexane solution. Stern-Volmer plots of intensities and lifetimes versus oxygen concentrations revealed smaller Stern-Volmer quenching coefficients for lifetimes than for intensities. Analysis of the data in terms of static quenching models suggests that the Stern-Volmer slope differences result from a charge-transfer interaction between the aromatic and oxygen molecules in the cases of naphthalene and pyrene. A method of estimating dissolved oxygen concentration using the cyclohexane-oxygen charge-transfer band is also reported.
authors.affiliation: Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, USA.
authors.forename: J Thomas
authors.initials: JT
authors.lastname: Brownrigg
authors.forename: Jonathan E
authors.initials: JE
authors.lastname: Kenny