title: Cetylpyridinium chloride micelles as a selective fluorescence quenching solvent media for discriminating between alternant versus nonalternant polycyclic aromatic hydrocarbons.
abstract: Fluorescence behavior of 41 polycyclic aromatic hydrocarbons (PAHs) dissolved in aqueous micellar cetyltrimethylammonium chloride (CTAC) solvent media and in five different cetyltrimethylammonium chloride + cetylpyridinium chloride (CPC) surfactant mixtures is reported. Experimental fluorescence measurements reveal that CPC is a selective fluorescence quenching agent for alternant PAHs. The cetylpyridinium ion effectively quenched emission intensities of the 21 alternant PAHs studied. Emission intensities of nonalternant PAHs, with a few noted exceptions, were unaffected by the presence of CPC in the mixed cationic surfactant micelles.
authors.affiliation: Department of Chemistry, University of North Texas, Denton, TX 76 203-0068, USA.
authors.forename: S
authors.initials: S
authors.lastname: Pandey
authors.forename: W E
authors.initials: WE
authors.lastname: Acree
authors.forename: J C
authors.initials: JC
authors.lastname: Fetzer