Cryogenic Probe with Low-Loss Transmission Line for Nuclear Magnetic Resonance

Temperature Dependence of Nuclear Magnetic Resonance Chemical Shifts of 129Xe in the α-Cages of NaY Zeolite

“…NMR experiments were performed with a Varian Unity 400 spectrometer operating at 110.629 MHz. Low temperatures were achieved with an Oxford model CF 1200 cryostat using a home-built transmission line NMR probe . Temperature was measured with the Au−Fe/constantan thermocouple that is part of the temperature sensing and controlling circuit in the Oxford cryostat and with a calibrated carbon−glass resistor that is mounted in a copper block that is part of the probe structure.…”

Nuclear Magnetic Resonance Analysis of Natural Organic Matter

“…At present, commercial probes are restricted to solution -state NMR, although cryogenically cooled HR -MAS and solid -state NMR probes are in development. In an organic solvent system, cryogenically cooled probes provide a three -to fourfold enhancement in sensitivity (Kim et al, 1995 ;Odoj et al, 1998 ;Voehler et al, 2006 ). This advantage decreases as the salinity of the sample increases.…”

Theoretical and experimental aspects of enantiomeric differentiation using natural abundance multinuclear nmr spectroscopy in chiral polypeptide liquid crystals

“…Indeed the present developments and studies of such cryoprobes have shown a very significant gain of the signal sensitivity (a factor 3 to 4) compared with standard high resolution probes. 54 Consequently the use of both higher field and deuterium cryoprobes should quickly establish that NAD 2D NMR spectroscopy is the most general and powerful technique for analysing chiral molecules in PBLG.…”