A temperature-controlled sample shuttle for field-cycling NMR

Pileio, Giuseppe, Hall, Andrew MR and Cartlidge, David (2020) A temperature-controlled sample shuttle for field-cycling NMR. Journal of Magnetic Resonance, 317, [106778]. (doi:10.1016/j.jmr.2020.106778).

Record type: Article

Abstract

We present a design for a temperature-controlled sample shuttle for use in NMR measurements at variable magnetic field strength. Accurate temperature control was achieved using a mixture of water-ethylene glycol as a heat transfer fluid, reducing temperature gradients across the sample to < 0.05 °C and minimising convection. Using the sample shuttle, we show how the longitudinal (T ₁) and singlet order (T _S) relaxation time constants were measured for two molecules capable of supporting long-lived states, with new record lifetimes observed at low field and above ambient temperatures.

Text

A temperature-controlled sample shuttle for field-cycling NMR - Version of Record

Available under License Creative Commons Attribution.

Download (1MB)

More information

Accepted/In Press date: 23 June 2020

e-pub ahead of print date: 27 June 2020

Published date: August 2020

Additional Information: Funding Information: This work was supported by a research grant from EPSRC , United Kingdom ( EP/P005187/1 ) "HyperStore: Singlet states and supercritical fluids for storage and transport of hyperpolarised spin order”. The authors would like to thank LakeShore Cryotonics for supplying the miniature Hall effect sensor used for magnetic field strength measurements, Dr Lynda Brown for synthesis of labelled compounds and Dr Francesco Giustiniano for many useful discussions. The authors acknowledge the COST , European Union, CA15209 “ , "European Network on NMR Relaxometry”. Publisher Copyright: © 2020 The Authors

Keywords: Field-cycling NMR, Sample shuttle, Singlet NMR, Spin relaxation