High-pressure NMR study of liquid propanol up to 3 GPa

Abstract

Longitudinal ¹H-relaxation rates 1/T₁ for the methyl and hydroxy protons of propanol have been recorded at 300 MHz over the pressure range 0.12 GPa to 3.1 GPa at three temperatures 293 K, 308 K and 313 K. A maximum of the relaxation rate as a function of pressure was detected. The probe head is constructed on the basis of an anvil cell with in situ pressure measurement by ruby fluorescence. The probe is pressurised and then transferred to the fluorescence spectrometer and the NMR spectrometer for the respective measurements.