Abstract
Fluorescence spectra of trans-1-(2-naphthyl)-2-phenylethene (NPE) obtained under varying conditions of excitation wavelength and oxygen concentration in methylcyclohexane are resolved into two distinct components by application of principal component analysis with self-modeling. The key to obtaining unique spectral solutions is the constraint that Stern-Volmer quenching plots for the individual conformers be independent of excitation wavelength. Resolved conformer fluorescence-excitation spectra are obtained by application of principal component analysis on a matrix of fluorescence-excitation spectra. Consistency between pure component fluorescence and fluorescence-excitation spectra is established by use of a two-dimensional fluorescence-excitation emission matrix
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