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Thermometers for low temperature Magic Angle Spinning NMR
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Kemp, Thomas F., Balakrishnan, Geetha, Pike, Kevin J., Smith, Mark E. and Dupree, Ray (2010) Thermometers for low temperature Magic Angle Spinning NMR. Journal of Magnetic Resonance, Vol.204 (No.1). pp. 169-172. doi:10.1016/j.jmr.2010.02.018 ISSN 1090-7807.
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Official URL: http://dx.doi.org/10.1016/j.jmr.2010.02.018
Abstract
The measurement of temperature in a Magic Angle Spinning NMR probe in the temperature range 85-300 K is discussed. It is shown that the shift of the Sn-119 resonance of Sm2Sn2O7 makes a good thermometer with shift being given by delta = 223 - 9.54 x 10(4)/T ppm and a potential precision of better than 0.5 K over the entire temperature range. The sensitivity is such (e.g. 4.2 ppm/K at 150 K) that small temperature gradients across the sample can readily be measured. Furthermore, since the spin-lattice relaxation time is very short, measurements can be made in similar to 1 s enabling relatively rapid temperature changes to be followed. Values for the chemical shift of Pb-207 in Pb(NO3)(2) down to similar to 85 K are also presented. Although the Pb-207 shift variation is approximately linear near room temperature (we find a slope 0.725 +/- 0.002 ppm/K over the range 293-153 K), it clearly deviates from linearity below similar to 130 K.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Administration > University Executive Office Faculty of Science, Engineering and Medicine > Science > Physics |
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| Library of Congress Subject Headings (LCSH): | Nuclear magnetic resonance spectroscopy -- Methodology, Temperature measuring instruments | ||||
| Journal or Publication Title: | Journal of Magnetic Resonance | ||||
| Publisher: | Academic Press | ||||
| ISSN: | 1090-7807 | ||||
| Official Date: | May 2010 | ||||
| Dates: |
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| Volume: | Vol.204 | ||||
| Number: | No.1 | ||||
| Number of Pages: | 4 | ||||
| Page Range: | pp. 169-172 | ||||
| DOI: | 10.1016/j.jmr.2010.02.018 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Date of first compliant deposit: | 3 December 2015 | ||||
| Date of first compliant Open Access: | 3 December 2015 | ||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC) | ||||
| Grant number: | EP/D045967 (EPSRC) |
Data sourced from Thomson Reuters' Web of Knowledge
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