Infrared Investigation of Hydrogen Bonding on the Surface of Beryllium Fluoride Glass

摘要

Infrared absorbance spectra were obtained from dry Beryllium fluoride glass surface and from the same surface after exposure to moist air. No absorbance resulted from the dry surface, but an intense broad, structured contour, with a maximum near 3170 wave numbers was produced by the wetted surface. Continuous evaporation was carried out for 905 days. The integrated intensity of the 3170 wave number contour was measured. This contour is thought to arise from the combined stretching vibrations of surface Be-OH...F ...H-OH2(H2O)2(H2O) units. Upon evacuation the second sphere water molecules are removed, but the two primary sphere water molecules remain. Keywords: Glasses, Beryllium fluoride, Surfaces, Water absorption.