Matrix Effects in Matrix Isolation Infrared Spectroscopy

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A major factor limiting extensive use of matrix isolation gas chromatography-Fourier transform infrared spectrometry is the incompatibility of matrix-isolated spectra with available vapor-or condensed-phase spectral data bases. Here, matrix and surface effects on matrix isolation infrared spectra of organic molecules are investigated. Use of xenon at −215°C (58 K) to obtain matrix isolation spectra that are similar to condensed-phase spectra is demonstrated. Finally, the effect of temperature on reflection-absorption infrared spectra of matrix-isolated molecules is discussed, and guidelines for obtaining and interpreting matrix isolation infrared spectra of gas chromatographic eluants using the existing condensed phase data bases are provided.

Keywords: Infrared; Instrumentation, matrix isolation GC-IR

Document Type: Research Article


Affiliations: Department of Chemistry, University of California, Riverside, California 92521

Publication date: July 1, 1989

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