化工学报2015，Vol.66Issue(Z1)：54-59,6.DOI:10.11949/j.issn.0438-1157.20150123
2,6-二甲氧基苯酚在1-丁基-3-甲基咪唑四氟硼酸盐水溶液中溶解行为的红外光谱分析
Understanding dissolution behavior of 2, 6-dimethoxyphenol in 1-butyl-3-methylimidazolium tetrafluoroborate aqueous solutions by infrared spectroscopy
摘要
Abstract
Dissolution behavior of 2,6-dimethoxyphenol (2,6-DMP) in 1-butyl-3-methylimidazolium tetrafluoroborate ([C4mim]BF4) aqueous solutions (ionic liquid mole fractionxIL=1.0—0.02) was investigated by attenuated total reflectance infrared (ATR-IR) spectroscopy and two-dimensional correlation IR spectroscopy. The results indicated that 2, 6-DMP solubility increases and then dramatically decreases with increasing amount of water added into [C4mim]BF4. The corresponding threshold ofxIL is 0.1. There is a strong interaction between 2,6-DMP and [C4mim]BF4, and the methoxyl group of 2,6-DMP is one of main active sites. In the case of adding small amount of water into [C4mim]BF4 (xIL=0.1—1.0), compact ionic clusters of [C4mim]BF4could be dissociated. 2,6-DMP is easy to interact with [C4mim]BF4, which results in the increase of its solubility. In the case of adding a large amount of water into [C4mim]BF4 (xIL=0.02—0.1), the ionic clusters are completely dissociated into ionic pairs surrounded by large molecular water clusters. The interactions between hydrophobic2,6-DMP and [C4mim]BF4become difficult, and the 2,6-DMP solubility decreases. This transformation of microstructure withwater addition influences the 2,6-DMP dissolution.关键词
离子液体/水/2,6-二甲氧基苯酚/溶解性/红外光谱Key words
ionic liquid/water/2/6-dimethoxyphenol/solubility/infrared spectroscopy分类
化学化工引用本文复制引用
赵德扬,魏立纲,李坤兰,王艳涛,马英冲,邵国林,闫冰,万文英,刘畅..2,6-二甲氧基苯酚在1-丁基-3-甲基咪唑四氟硼酸盐水溶液中溶解行为的红外光谱分析[J].化工学报,2015,66(Z1):54-59,6.基金项目
国家自然科学基金项目(21276034) （21276034）
辽宁省教育厅科学研究一般项目(L2013220).supported by the National Natural Science Foundation of China (21276034) and the Scientific Research Project of the Department of Education of Liaoning Province (L2013220). （L2013220）
