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以1,2-二甲基咪唑、正溴丁烷和三氟甲基磺酰亚胺锂盐为原料,合成了液态范围宽、热稳定性好、无酸性质子的疏水性离子液体1-n-丁基-2,3-二甲基咪唑三氟甲基磺酰亚胺.将该离子液体作为黏合剂,制备离子液体/碳糊电极(CILE)和葡萄糖氧化酶/离子液体/碳糊电极(GOD-CILE),分别以铁氰酸钾溶液、磷酸氢二钠/磷酸二氢钾溶液(PBS,pH值为6.98)为电化学探针,研究CILE和GOD-CILE的直接电化学性能和电极表面形态.结果表明,与传统黏合剂石蜡相比,离子液体能有效地将石墨粉黏结,形成均匀平整界面,咪唑环和石墨层之间形成“π-π环”相互作用,使得电子在电极内的传递速率大大加快,电流响应明显增加;GOD吸附在CILE表面可保持生物活性,表现出一对峰形良好的准可逆氧化还原峰.离子液体良好的导电能力、“π-π环”相互作用和黏合性质促进了离子液体在第三代传感器中的研发.
Hydrophobic ionic liquid 1-n with wide range of liquid, good thermal stability and acid-free proton was synthesized from 1,2-dimethylimidazole, n-bromobutane and lithium trifluoromethanesulfonimide Butyl-2,3-dimethylimidazolium trifluoromethanesulfonimide.Ionic liquid as carbon paste electrode (CILE) and glucose oxidase / ionic liquid / carbon paste electrode (GOD-CILE). The electrochemical properties of CILE and GOD-CILE were investigated with potassium ferricyanide, disodium hydrogen phosphate / potassium dihydrogen phosphate (PBS, pH = 6.98) Electrode surface morphology.The results show that the ionic liquid can effectively bind the graphite powder to form a uniform and flat interface compared with the traditional binder paraffin and the interaction between the imidazole ring and the graphite layer forms a π- The transfer rate of electrons in the electrode is greatly accelerated, the current response is significantly increased; GOD adsorbed on the CILE surface can maintain biological activity, showing a pair of peak shape quasi-reversible redox peaks good ionic liquid good electrical conductivity, "π- The π-ring interaction and adhesion properties facilitate the development of ionic liquids in third-generation sensors.