Photo-acoustic spectroscopic evidence for site–site interactions in a bifunctional surface-bonded phase

Abstract

The first direct, spectroscopic observation of interactions between surface-bonded organic molecules has been made.

Effects of concentration and sample preparation in photoacoustic spectroscopy of powdered samples

“…Very little additional fine structure is generally observed in these spectra. It has thus become of interest to determine the source of the line widths in these spectra and the ultimate limits of structural resolution that can be obtained from the 13C NMR analysis of coals, oil shales and kerogens (13,14).…”