Crystal Structure,Electrochemical Capability And Application Of Ionic Liquids

Ionic liquids are organic liquids, which are composed entirely of ions atroom temperature or around the temperature. Because it has the unique meritsincluding good conductivity, wide electrochemical window, negligible vaporpressure, strong ability of dissolve, ionic liquid has been widely used in manyfields such as, organic synthesis, separation and electrochemistry.The ionic liquid of N-butyl-isoquinolinium gallium tetrachloride([BIQL]GaCl₄) was synthesized, single crystals was obtained. The solubility of[BIQL]GaCl₄ was studied in different solvent and it's crystal structure wascharacterized by X-ray diffraction analyses. [BIQL]GaCl₄ crystal is in themonoclinic space group P2₁/c with a=7.1438(12)(?), b=14.3490(14)(?), c=16.3531(18)(?),β=94.885(7)^o, V=1670.2(4)(?)³ for Z=4, R1=0.0266,wR2=0.0606 (Ⅰ＞2.00σ(â… )), its calculated density is 1.582 g/cm³. The cation andanion of [BIQL]GaCl₄ arrange orderly in pair and the results indicate thatcoulomb attraction is more dominant between cation and anion. [BIQL]GaCl₄ islayer structure as mainlyÏ€electron plane of isoquinoline interleave and the layerdistance is 3.431(?), simultaneity weak local hydrogen bonds C—H…Cl exist.The electrochemistry of [BIQL]GaCl₄ in diffenent molar fraction of GaCl₃ and solution of [BIQL]GaCl₄ in acetonitrile were studied. The effect of scan rateand temperature on electrochemical process of [BIQL]GaCl₄ were discussed bycyclic voltammetry method in three-electrode cell, glassy carbon electrode asworking electrode, Pt wire as counter electrode, Al electrode as referenceelectrode.The electrochemical behavior of Al,Cu,Ag and stainless steel in[bmim]BF₄ and solution of [bmim]BF₄ in acetonitrile were studied. Theelectrochemical active and corrosion property of Al,Cu,Ag and stainless steelin [bmim]BF₄ were discussed using cyclic voltammetry and Tafel curve. It wasindicated Al and stainless steel possess indifferent electrochemical, Cu and Agpossess electrochemical active.Chemical silvering on copper power was studied in medium of [bmim]BF₄,because Cu and Ag show electrochemical active in [bmim]BF₄ ionic liquid. Theresults indicate that chemical silvering on copper power is possible in ionicliquid no-aqueous system, which provide foundation for farther application ofionic liquid.