Solubility of 1-Alkyl-3-ethylimidazolium-Based Ionic Liquids in Water and 1-Octanol
作者:Urszula Domańska、Anna Rękawek、Andrzej Marciniak
DOI:10.1021/je700693z
日期:2008.5.1
partly with water. Ionic liquids with the ethyl substituent on the cation [HEIM][Tf2N] show higher solubility in 1-octanol in comparison with the methyl substituent. After the synthesis, the characterization and purity of the compounds were obtained by nuclear magnetic resonance (NMR), elemental analysis, water content (Fischer method), and differential scanning microcalorimetry (DSC). From DSC, the melting
以下咪唑鎓离子液体(IL),1-乙基-3-乙基咪唑鎓或1-丁基-3-乙基咪唑鎓或1-己基-3-乙基咪唑鎓双(三氟甲基)芳酰}酰亚胺[EEIM] [Tf 2 N]或[BEIM] [Tf 2 N]或[HEIM] [Tf 2 N],+水或+ 1-辛醇}和1-丁基-3-乙基咪唑鎓已经测量了六氟磷酸盐[BEIM] [PF 6 ] +水或+1-辛醇}。阴离子类型([Tf 2 N]-与[PF 6]-),研究了包括烷基链长的离子液体的结构组分对阳离子和乙基取代基(而不是阳离子上的甲基)的影响,该离子液体对IL的物理化学性质和相行为的影响。在每个系统中均观察到较高的临界溶液温度(UCST)。烷基链长度的增加增加了与1-辛醇和部分与水的互溶性。在阳离子[HEIM] [Tf 2 ]上带有乙基取代基的离子液体与甲基取代基相比,N]在1-辛醇中显示出更高的溶解度。合成后,通过核磁共振(NMR),元素分析,水含