FFC NMR relaxometry is mostly used for proton-based analyses (1H nucleus), as detailed in the other applications pages. It is however possible to study dispersion curves or simpler decay curves of T1 for other nuclei, such as deuterium (2H), fluorine (19F), lithium (7Li), compounds enriched in carbon-13 (13C) and more.
Use
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. [ 
Literature Reference
Heteronuclei
M. Flämig, M. Becher, M. Hofmann, T. Körber, B. Kresse, A. F. Privalov, L. Willner§, D. Kruk∥, F. Fujara, and E. A. Rössler, J. Phys. Chem. B 2016, 120, 31, 7754–7766
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