Today, something that has nothing to do with DNP-NMR spectroscopy, but is a cool piece of equipment.
Hall, Andrew M.R., Topaz A.A. Cartlidge, and Giuseppe Pileio. “A Temperature-Controlled Sample Shuttle for Field-Cycling NMR.” Journal of Magnetic Resonance 317 (August 2020): 106778. https://doi.org/10.1016/j.jmr.2020.106778.
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 waterethylene 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.