A temperature-controlled sample shuttle for field-cycling NMR
Andrew M. R. Hall, Topaz A. A. Cartlidge, Giuseppe Pileio
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 (T1) and singlet order (TS) 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.
Topics & Concepts
Temperature controlEthylene glycolRelaxation (psychology)ChemistryField (mathematics)Analytical Chemistry (journal)Materials scienceNuclear magnetic resonanceThermodynamicsChromatographyOrganic chemistryPhysicsPure mathematicsMathematicsPsychologySocial psychologyAdvanced NMR Techniques and ApplicationsNMR spectroscopy and applicationsAdvanced MRI Techniques and Applications