An NMR thermometer for cryogenic magic-angle spinning NMR: The spin-lattice relaxation of I-127 in cesium iodide

作者：Sarkar Riddhiman; Concistre Maria; Johannessen Ole G; Beckett Peter; Denning Mark; Carravetta Marina^*; al Mosawi Maitham; Beduz Carlo; Yang Yifeng; Levitt Malcolm H

来源：Journal of Magnetic Resonance, 2011, 212(2): 460-463.

DOI：10.1016/j.jmr.2011.08.021

• Solid state NMR
• Magic angle spinning (MAS)
• Temperature measurement

The accurate temperature measurement of solid samples under magic-angle spinning (MAS) is difficult in the cryogenic regime. It has been demonstrated by Thurber et al. (J. Magn. Reson., 196 (2009) 84-87)[10] that the temperature dependent spin-lattice relaxation time constant of Br-79 in KBr powder can be useful for measuring sample temperature under MAS over a wide temperature range (20-296 K). However the value of T-1 exceeds 3 min at temperatures below 20 K, which is inconveniently long. In this communication, we show that the spin-lattice relaxation time constant of I-127 in CsI powder can be used to accurately measure sample temperature under MAS within a reasonable experimental time down to 10 K.

• 出版日期2011-10