TY - JOUR
T1 - The use of sample rotation for minimizing convection effects in self-diffusion NMR measurements
AU - Esturau, Nuria
AU - Sánchez-Ferrando, Francesc
AU - Gavin, Josée Adrián
AU - Roumestand, Christian
AU - Delsuc, Marc André
AU - Parella, Teodor
PY - 2001/1/1
Y1 - 2001/1/1
N2 - Undesirable temperature gradients in a NMR sample tube are usually generated by an inappropiate temperature regulation system. We have shown that such convection effects can greatly distort the measurement of translational self-diffusion coefficients. The use of sample spinning helps to minimize such undesirable effects by disruption of convection fluxes due to resulting Coriolis forces that have a strongly stabilizing effect on the conducting state of the system (J. Lounila et al., J. Magn. Reson. A 118, 50 (1996)). This simple trick allows the accurate measurement of diffusion coefficients for a wide range of temperatures and solvents without the need for a convection-compensated NMR pulse sequences or more sophisticated temperature control units. Experimental data obtained for some target compounds dissolved in several common deuterated solvents at different temperatures are reported and discussed. © 2001 Academic Press.
AB - Undesirable temperature gradients in a NMR sample tube are usually generated by an inappropiate temperature regulation system. We have shown that such convection effects can greatly distort the measurement of translational self-diffusion coefficients. The use of sample spinning helps to minimize such undesirable effects by disruption of convection fluxes due to resulting Coriolis forces that have a strongly stabilizing effect on the conducting state of the system (J. Lounila et al., J. Magn. Reson. A 118, 50 (1996)). This simple trick allows the accurate measurement of diffusion coefficients for a wide range of temperatures and solvents without the need for a convection-compensated NMR pulse sequences or more sophisticated temperature control units. Experimental data obtained for some target compounds dissolved in several common deuterated solvents at different temperatures are reported and discussed. © 2001 Academic Press.
U2 - 10.1006/jmre.2001.2411
DO - 10.1006/jmre.2001.2411
M3 - Article
VL - 153
SP - 48
EP - 55
IS - 1
ER -