Evaluation of Infrared Vapor-Phase Libraries for Matrix Isolation Spectral Searching

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Abstract
By broadening matrix isolation absorbance bands to match vapor-phase bandwidths, it is possible to employ vapor-phase libraries to provide structural information from matrix isolation infrared spectra. However, matrix effects cause frequency shifting and peak multiplicity in matrix isolation spectra which decrease correlation between matrix isolation and vapor-phase spectra. The effect of matrix effects on library search results is investigated. Of 40 matrix isolation spectra tested, 28 were identified by library search with the use of a band-broadening factor of 1.8.