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Using 129 Xe NMR to Probe the Structure of Ionic Liquids

2013; American Chemical Society; Volume: 4; Issue: 16 Linguagem: Inglês

10.1021/jz401279u

1948-7185

Pedro Morgado, Karina Shimizu, José M. S. S. Esperança, Patrícia M. Reis, Luís Paulo N. Rebelo, José N. Canongia Lopes, Eduardo J. M. Filipe,

Thermodynamic properties of mixtures

The mesoscopic structure of 30 distinct ionic liquids was probed by 129Xe NMR spectroscopy. The interpretation of the experimental data was complemented using molecular dynamics results. The results clearly show that xenon can effectively probe the various environments characteristic of different ionic liquids (ILs) and is thus able to distinguish between distinct ionic liquid families, including different types of interactions with diverse types of anion/polar networks. A finer analysis of the NMR data also confirmed that the xenon probes can also provide information on how the complex structure of an IL evolves along a homologous series.