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Abstract

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

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Matrix Effects in Matrix Isolation Infrared Spectroscopy

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