NMR AS A TOOL IN THE STUDY OF IONIC LIQUIDS

FABIAN VACA CHAVEZ

Congreso; III Taller de Resonancia Magnética. NMR and EPR at the Forefront of Research; 2016

Ionic liquids (ILs) are compounds composed solely by anions and cations (salts)which are liquid below 100 oC [1]. These compounds have gained a huge interest in thelast twenty years by the scientific community and industry due to their wide range ofapplications on engineering, biotechnology and material science. ILs can be used, forinstance, as solvents for catalytic reactions or chemical synthesis, as electrolytes inbatteries, capacitors, fuel cells, CO2 capture, extraction of oil and tar from sand. Theseinumerous applications are due to their unique properties such as being liquid over awide range of temperature, nonvolatile, nonflammable, relatively thermally andelectrically stable and because they possess an excellent dissolving power for a largenumber of organic and inorganic materials.Here we present the use of NMR, namely relaxometry, spectrocospy anddiffusometry in the characterization of ILs to obtain information about the moleculardynamcs and molecular organization. The results include solvation of carbon dioxide ina ionic liquid, the effect on the dynamics due to nanoconfiments and the solvationmechanisms of IL+ aromatic compounds [2,3,4].REFERENCES1. Wasserscheid P. and Welton T., eds., Ionic liquids in synthesis, Wiley-VCH VerlagGmbH & Co. KGaA, 2002.2. Dias N.; Shimizu K.; Morgado P.; Filipe E.; Canongia Lopes J. N. and Vaca Chávez F.J. Phys. Chem. B, 2014, 118, 5772.3. Martins C. F.; Neves L.; Coelhoso I. M.; Vaca Chávez F.; Crespo J. G. and Sebastião P.J. Fuel Cells, 2013, 13 (6), 1166.4. Daniel C.; Vaca Chávez F.; Portugal C.; Crespo J. G. and Sebastião P. J. J. Phys.Chem B, 2015, 119 (35), 11740