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Experimental Signature of Microheterogeneity in Ionic Liquid–H 2 O Systems and Their Perturbation by Adding Li + Salts: A Pulsed Gradient Spin‐Echo NMR Approach
Author(s) -
Nanda Raju,
Rajamohanan P. R.,
Kumar Anil
Publication year - 2015
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201500503
Subject(s) - chemistry , ionic liquid , molecule , perturbation (astronomy) , thermal diffusivity , analytical chemistry (journal) , nuclear magnetic resonance , thermodynamics , chromatography , organic chemistry , physics , quantum mechanics , catalysis
Distinct microheterogeneity has been observed in the [OMIM]Br–H 2 O system, which is interestingly perturbed by the addition of Li + salts, indicating unusual diffusivity of [OMIM]Br and H 2 O molecules. However, the diffusional dynamics of water clusters show contrasting salting behavior at higher concentrations of Li + salts, following the classical salting phenomenon in lower amounts. In contrast, the existing microheterogeneity in the [BMIM]Br–H 2 O system is weak enough to show any perturbation caused by the Li + salts on the NMR time scale.