Measurement of deuterium relaxation rates could be important in understanding the amount of deuterium enrichment and exchange processes between deuterium nuclei and protons, which are often important for chemical mechanism studies. An in-house FFC NMR relaxometry study involving AIST Japan, looked into heavy water (D2O) relaxation rates in fuel cell membranes. The decay curves presented an evident multi-exponentiality particularly at low field.
A study has also been published using deuterium NMRD to elucidate molecular dynamics parameters in polymers.
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Lithium is an important component of batteries in electronics industry. The fluorine nucleus is often found as part of the organic counter-ion of lithium-based electrolytes for batteries. The possibility to study the relaxation rates of these important nuclei could aid the studies for new battery electrolyte and electrode materials.
19F FFCR NMR has been applied to investigate the molecular dynamics of liquid crystals.
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NMRD profiles of three different nuclei (1H, 7Li and 19F), at 20°C, belonging to the same sample of an electrolyte solution for a battery system. From Stelar in-house data.
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Molecular dynamics information on the 13C nucleus could be particularly important in studies of biomolecules, such as proteins, as well as for some carbon-containing synthetic materials.
A Stelar in-house study demonstrated, through 13C acquisition at low field, that FFC NMR relaxometry has the capacity to investigate the relaxometric behavior of low NMR-sensitive nuclei at low magnetic field strengths as well as at low temperatures (-120 °C).
It is possible to enhance the signal, by means of a method known as dynamic nuclear polarization (DNP), to enable detection of particularly insensitive heteronuclei such as 13C.
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