Affiliation:
1. Department of Chemistry, University of North Texas, Denton, Texas 76203-5068, U.S.A. (S.A.T., J.M.G., W.E.A.); Rütgerswerke AG, Postfach 2002 41/51/61, D-44558 Castrop-Rauxel, Germany (M.Z.); and Department of Chemistry, University of Victoria, P.O. Box 3055, Victoria, BC V8W 3P6, Canada (R.H.M.)
Abstract
Fluorescence emission behavior is reported for 1,1′-binaphthalene, 2,2′-binaphthalene, 9,9′-bianthracene, 9,9′-biphenanthrene, 1,1′-methylene-bisnaphthalene, and 1,1′,2,2′-tetrahydro-5,5′-biacenaphthylene dissolved in organic nonelectrolyte solvents of varying polarity, refractive index, and dielectric constant. Fluorescence measurements are used to classify the six bipolycyclic aromatic hydrocarbon (bi-PAH) solutes as either solvatochromic probe or nonprobe molecules, depending upon whether measured fluorescence properties vary with solvent nature. Of the bi-PAHs studied, only 9,9′-bianthracene exhibited probe character. Possible correlations between 9,9′-bianthracene's maximum intensity emission wavelength and select functions of solvent refractive index and dielectric constant were examined. Also reported is the effect that nitromethane has on bi-PAH fluorescence emission intensities.
Subject
Spectroscopy,Instrumentation
Cited by
27 articles.
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