Determination of sample temperature and temperature stability with 129Xe NMR

Jani Saunavaara; Jukka Jokisaari

doi:10.1016/j.jmr.2006.01.004

Determination of sample temperature and temperature stability with 129Xe NMR

J Magn Reson. 2006 May;180(1):58-62. doi: 10.1016/j.jmr.2006.01.004. Epub 2006 Feb 3.

Authors

Jani Saunavaara¹, Jukka Jokisaari

Affiliation

¹ NMR Research Group, Department of Physical Sciences, P.O. Box 3000, University of Oulu, FIN-90014, Finland.

PMID: 16459114
DOI: 10.1016/j.jmr.2006.01.004

Abstract

The (129)Xe chemical shift of xenon dissolved in isotropic liquids is very sensitive to solvent density, which in turn is dependent on the sample temperature. Therefore, the (129)Xe chemical shift can be used as the basis of a thermometer for measuring actual sample temperatures in NMR experiments. Good accuracy can be achieved, but the thermometer is particularly useful in monitoring temperature stability. In the present case, carbon tetrachloride (CCl(4)), ethylbromide (C(2)H(5)Br), and deuterated chloroform (CDCl(3)) were chosen as solvents because of their large thermal expansion coefficient.