【摘要】 合成了基于N-甲基咪唑、2-吡咯烷酮阳离子的两个Br nsted酸性离子液体系列:[Hmim]HSO4/BF4、[Hnhp]HSO4/BF4以及两种—SO3H功能化酸性离子液体1-(3-磺酸基)丙基-3-甲基咪唑硫酸氢盐([C3SO3Hmim]HSO4)、N-(3-磺酸基)丙基吡咯烷酮硫酸氢盐([C4SO4Hnnp]HSO4)。其中,[Hnhp]HSO4/BF4,[C4SO4Hnnp]HSO4是本实验设计合成的新型酸性离子液体,而咪唑类离子液体用于对照。上述6种离子液体均以核磁共振、电喷雾质谱、红外光谱和紫外光谱分析法对结构加以表征并确认;并以它们作为溶剂和催化剂对乙酸、乙醇酯化反应进行初步试验,结果表明所合成的新型酸性离子液体(尤其是引入磺酸基的)是酯化反应较理想的绿色液体酸催化剂。更多还原

【Abstract】 Imidazolium-based and 2-pyrrolidonium-based ionic liquids,viz.HSO₄/BF₄ and HSO₄/BF₄,and —SO₃H functionalized acidic ionic liquids,viz.1-（3-sulfonic acid） propyl-3-methylimidazolium hydrogen sulfate（[C₃SO₃Hmim]HSO₄） and N-（3-sulfonic acid） propylpyrrolidonium hydrogen sulfate（[C₄SO₄Hnnp]HSO₄）,were synthesized.Among them,HSO₄/BF₄ and [C₄SO₄Hnnp]HSO₄ were the novel types of acidic ionic liquids designed and synthesized in this work.The imidazolium-based ionic liquids were used for comparison.The ionic liquids mentioned were all characterized by NMR,ESI MS,FT-IR and UV,respectively.They were used as both solvents and catalysts for the esterification of acetic acid with ethanol.The results showed that the acidic ionic liquids,especially the —SO₃H functionalized acidic ionic liquids are environmental friendly acidic catalysts for esterification.更多还原