INVESTIGATION OF HYDRATED POWDERS AND SUSPENSIONS OF VO2 BY THE H-1-NMR METHOD OF ADSORBED MOLECULES

Using the H-1 NMR method, the spectral characteristics of the signal f rom water at the interface of VO2 powders in the temperature range of the metal-semiconductor phase transition (MSPT) have been studied. It has been found that the signal intensity decreased at the phase transi tion and its width increased. This was due to a higher absorptivity of the material in the metallic state and to a rise in efficiency of nuc lear magnetic relaxation due to conduction electrons. The result obtai ned allows us to conclude that H-1 NMR spectroscopy on adsorbed molecu les can be used to study the specificity of MSPT dynamics in hydrated powders and suspensions of VO2.