title: An NMR thermometer for cryogenic magic-angle spinning NMR: the spin-lattice relaxation of (127)I in cesium iodide.
abstract: 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 (79)Br 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 20K, which is inconveniently long. In this communication, we show that the spin-lattice relaxation time constant of (127)I in CsI powder can be used to accurately measure sample temperature under MAS within a reasonable experimental time down to 10 K.
authors: School of Chemistry, University of Southampton, SO17 1BJ, United Kingdom.
authors: Riddhiman
authors: R
authors: Sarkar
authors: Maria
authors: M
authors: Concistrè
authors: Ole G
authors: OG
authors: Johannessen
authors: Peter
authors: P
authors: Beckett
authors: Mark
authors: M
authors: Denning
authors: Marina
authors: M
authors: Carravetta
authors: Maitham
authors: M
authors: Al-Mosawi
authors: Carlo
authors: C
authors: Beduz
authors: Yifeng
authors: Y
authors: Yang
authors: Malcolm H
authors: MH
authors: Levitt
mesh_terms: D001965:Bromides / Q000737:chemistry; D002138:Calibration; D002586:Cesium / Q000737:chemistry*; D003080:Cold Temperature; D007454:Iodides / Q000737:chemistry*; D007455:Iodine / Q000737:chemistry*; D007456:Iodine Isotopes; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation*; D013821:Thermometers
chemical_list: D001965:Bromides; D007454:Iodides; D007456:Iodine Isotopes; D002586:Cesium; D007455:Iodine; C040050:cesium iodide