A Bloembergen–Purcell–Pound 13C NMR relaxation study of the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate

doi:10.1007/S00216-003-2218-1

Paper

A Bloembergen–Purcell–Pound 13C NMR relaxation study of the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate

Published Mar 1, 2004 · W. R. Carper, P. G. Wahlbeck, J. H. Antony

Analytical and Bioanalytical Chemistry

Q2 SJR score

37

Citations

0

Influential Citations

Full textSemantic Scholar

Abstract

The molecular structure and rotational motion of the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) were studied over a wide temperature range using the Bloembergen–Purcell–Pound 13C NMR spin–lattice relaxation method and NOE factors. Examination of the spin–lattice relaxation times (T1) and the rates (R1=1/T1) of the 1-butyl-3-methylimidazolium cation reveals the relative motions of each carbon in the imidazolium cation. The rotational characteristics of the [BMIM] cation are supported by ab-initio molecular structures of [BMIM][PF6] using density functional theory (DFT) and Hartree–Fock (HF) methods. The ab-initio gas phase structures of [BMIM][PF6] indicate that the 1-butyl-3-methylimidazolium C2 hydrogen, the ring methyl group, and the butyl side-chain hydrogen atoms form hydrogen bonds with the hexafluorophosphate anion.

Study Snapshot

The ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) shows rotational characteristics supported by ab-initio molecular structures and NMR relaxation methods.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

A Bloembergen–Purcell–Pound 13C NMR relaxation study of the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate

References

Citations