Infrared Spectroscopic Analyses of Transformations of Chemical Species on the Silica Highly-Reacted with Gaseous BF₃

Abstract

Transformations of chemical species formed by the reaction of gaseous BF₃ with high pressure and silica preheated at 473 and 1093 K were studied with the use of infrared absorption spectrometry. The species containing -BF₂ and the species containing>BF were transformed to each other on the highly-reacted silica depending on the pressure of BF₃ in cell, and some of the species containing -BF₂ were also desorbed without their transformations to the species containing>BF. H₂O played important roles in these transformations.