摘要
以三乙胺和苄氯为原料,通过中间体氯化苄基三乙胺盐([Nbz222]Cl)的阴离子交换反应合成了5种目标产物:苄基三乙胺四氟硼酸盐([Nbz222]BF4),苄基三乙胺六氟磷酸盐([Nbz222]PF6),苄基三乙胺硫酸氢盐([Nbz222]HSO4),苄基三乙胺磷酸二氢盐([Nbz222]H2PO4)和苄基三乙胺咪唑盐([Nbz222]Im),产物的结构通过FTIR、1HNMR、13CNMR、ESI-MS、元素分析得以确认。除[Nbz222]PF6之外,其余4种目标产物的熔点均低于100℃。热分析表明,目标离子液体的热稳定性顺序为:[Nbz222]HSO4>[Nbz222]BF4>[Nbz222]Im>[Nbz222]H2PO4,其中[Nbz222]HSO4具有较好的热稳定性,热分解温度在260℃左右。目标离子液体均有一定的吸水性并在极性溶剂中有较好的溶解性。
The target compounds, benzyhriethylammonium tetrafluoroborate （[Nbx222 ] BF4 ）, benzyltriethylammonium hexafluorophosphate （[Nbx222] PF6 ）, benzyhriethylammonium hydrogen sulphate （ [Nbx222] HSO4 ）, benzyltriethylammonium dihydrogen phosphate （ [Nbx222] H2PO4 ）, and benzyltriethylammonium imidazolideintermediate （[Nbx222] Im）, were designed and synthesized by anion exchange reaction of the intermediate benzyltriethylammonium chloride which was prepared using triethylamine and benzyl chloride as starting materials. All the compounds, including the quaternary ammonium-type ionic liquids （ILs） , were characterized by means of FTIR, 1 HNMR, 13 CNMR, ESI - MS and elemental analysis respectively. Meanwhile, the physical properties of the ILs were investigated. It was found that the melting points of the ILs were below 100 ℃ except[Nbx222] PF6. The TG results indicate that the thermostability of [Nbx222] HSO4 was higher than that of the others, and the decomposition temperatures decrease in the order of [Nbx222] HSO4 〉 [Nbx222] BF4 〉 [Nbx222]Im 〉 [Nbx222] H2PO4. In addition, the ILs exhibited water absorption and were miscible well with polar solvent.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2012年第1期1-5,19,共6页
Fine Chemicals
基金
甘肃省自然科学基金(0916RJZA004)
甘肃省教育厅导师基金(0903-04)~~
关键词
季铵盐离子液体
氯化苄基三乙胺盐
吸水性
溶解性
热分析
功能材料
quaternary ammonium-based ionic liquids
benzyltriethylammonium chloride
water absorption
solubility
thermoanalysis
functional materials
