투고논문

Abstract   In order to obtain information on the structural geometry of NH₄HSeO₄ near the phase transition temperature, the spectrum and spin- lattice relaxation time in the rotating frame T_1ρ for the ammonium and hydrogen-bond protons were investigated through ¹H MAS NMR. T_1ρ for the hydrogen-bond protons abruptly decreased at high temperature and it is associated with the change in the structural geometry in O–H∙∙∙O bonds. This mobility of the hydrogen-bond protons may be the main reason for the high conductivity.

Keywords:  Proton conductions, Hydrogen bonds, Superprotonic conduction, Nuclear magnetic resonance