摘要
采用不同方法制备了阴离子分别为PF6-,CF3SO3-和CH3COO-的二氧化硅负载N,N,N′,N′-四甲基-N″-丙基胍(STMPG)离子液体,利用FT-IR,BET和元素分析等方法对上述负载型离子液体及其前体进行了结构表征,并测定了负载型离子液体的表面酸碱性,其中[STMPG]CH3COO的pKa值最高,为4.8～6.8。
Novel silica-supported N, N, N, N-tetramethyl-N-propyl guanidinium （STMPG） ionic liq- uids with different anions including PF6-, CH3COO- and CFaSO3 were prepared through different methods in order to solve separation and recycling problems in the homogeneous reactions. The struc- tures of the ionic liquids and their precursors were determined by means of FT-IR, BET and elemental analysis. The acidity and basicity of the ionic liquids were determined and the results showed that pKa of [STMPG]CH3COO was the highest, about 4.8 - 6.8.
出处
《精细石油化工》
CAS
CSCD
北大核心
2012年第3期22-27,共6页
Speciality Petrochemicals
基金
国家自然科学基金项目(20576025
21076059)
河北省自然基金项目(B2010000019)
