Infrared Spectra of Liquid Anhydrous Hydrogen Fluoride, Liquid Sulfur Dioxide, and Hydrogen Fluoride-Sulfur Dioxide Solutions

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Abstract
The infrared spectra of anhydrous liquid hydrogen fluoride, anhydrous liquid sulfur dioxide and mixtures of the two have been measured in the region from 1μ to 25μ. A value for the extinction coefficient for the polymer peak in the region higher than previously reported has been found, reflecting the existence of a greater proportion of higher hydrogen fluoride polymers in the liquid as compared with the gas. A study of the change in the spectra of solutions of varying concentration of anhydrous liquid hydrogen fluoride in anhydrous liquid sulfur dioxide has been made and its possible relation to the structure of the polymers in liquid hydrogen fluoride examined. The possible applicability of obtaining spectra of protein dissolved in anhydrous liquid mixtures of hydrogen fluoride and sulfur dioxide has been explored and a spectrum of silk fibroin in this solvent is presented.