Abstract

Fluorescence emission spectra are reported for dinaphtho[8,1,2abc; 2',1',8'klm]coronene, naphtho[8,1,2abc]coronene, naphth[2',1',8',7': 4,10,5]anthra[1,9,8abcd]coronene, dibenzo[bc,ef]coronene, benzo[1,2,3bc;4,5,6b'c']dicoronene, anthra[2,3a]coronene, dinaphtho-[8,1,2abc;2',1',8'jkl]coronene, and tetrabenzo[de,hi,mn,qr]naphthacene dissolved in <i>n</i>-hexadecane, butyl acetate, dichloromethane, and acetonitrile. Results of these measurements are used to screen PAHs for potential solvent polarity probe behavior. Of the eight PAHs studied, only naphtho[8,1,2abc]coronene, dinaphtho[8,1,2abc;2',1',8'klm]-coronene, and anthra[2,3a]coronene were classified as probe molecules. The fluorescence spectra of the first two PAHs show selective enhancement of the I band emission intensity in polar solvents. For anthra[2,3a]coronene, the measured ratio of emission intensities of bands I and II decreased systematically with increasing solvent polarity.

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