Session: Physical Chemistry Poster:

Ionic liquids are organic salts that are liquid below the boiling point of water. Numerous ionic liquid co-solvent mixtures have shown better results for various applications than pure ionic liquids, which lead to increase interest in the study of the transport properties such as viscosity, conductivity and self- diffusion coefficients of ionic liquid solutions. Studying transport properties of pure ionic liquid, ionic-liquid/co-solvent mixtures can provide additional information about ion-ion and ion-solvent interactions which further helps to increase our understanding of the ionicity of ion of liquids. PFG NMR spectroscopy is a well-established technique for studying molecular motion without disturbing the system, which is achieved by combining radio-frequency pulses with magnetic field gradient pulses that encode spatial information. PFG NMR spectroscopy was used to measure self-diffusion coefficient of 1-ethyl-3-methylimidazolium methyl phosphonate and mixture of 1-ethyl-3-methylimidazolium methyl phosphonate and methylimidazole. The self-diffusion coefficients of cation and anion of pure ionic liquid and ionic liquid/co-solvent mixture measured at different temperatures, further studied using the molar conductivity ratio approach which provides insight into the cation anion interactions of pure ionic liquid and the mixture will be extensively discussed.

Edward Quitevis

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