文摘
Pulsed-field gradient spin鈥揺cho (PGSE) NMR is a widely used method for the determination of molecular and ionic self-diffusion coefficients. The analysis has thus far been limited largely to 1H, 7Li, 19F, and 31P nuclei. This limitation handicaps the analysis of materials without these nuclei or for which these nuclei are insufficient for complete characterization. This is demonstrated with a class of ionic liquids (or ILs) based on the nonfluorinated anion 4,5-dicarbonitrile-1,2,3-triazole (DCTA鈥?/sup>). It is demonstrated here that 13C-PGSE NMR can be used to both verify the diffusion coefficients obtained from other nuclei, as well as characterize materials that lack commonly scrutinized nuclei 鈥?all without the need for specialized NMR methods.
Keywords:
pulsed-field gradient spin鈭抏cho; PGSE; diffusion coefficient; ionic liquid; DCTA