SPECTROSCOPIC PROPERTIES OF POLYCYCLIC AROMATIC-COMPOUNDS .6. THE NITROMETHANE SELECTIVE QUENCHING RULE VISITED IN AQUEOUS MICELLAR ZWITTERIONIC SURFACTANT SOLVENT MEDIA

Applicability of the nitromethane selective quenching rule for discrim inating between alternant versus nonalternant polycyclic aromatic hydr ocarbons (PAHs) is examined for 58 representative PAH solutes dissolve d in micellar xadecyl-N,N-dimethyl-3-anlmonio-1-propanesulfonate and i n micellar -dodecyl-N,N-dimethyl-3-ammonio-1-propanesulfonate solvent media. Results of measurements show that zwitterionic surfactants can be considered, for the most part, as providing a polar solubilizing me dia as far as the nitromethane selective quenching rule is concerned. Nonalternant PAHs that contain electron donating methoxy- and hydroxy- functional groups (and methyl-groups to a much lesser extent) are note d exceptions. (C) 1997 Elsevier Science B.V.