采用廉价易得的原料合成了阳离子含有烷基磺酸酯官能团的功能化离子液体,并考察了其热稳定性.该离子液体可催化羧酸的酯化反应,其催化活性高于阳离子非功能化的离子液体,而与磺酸功能化离子液体相当.同时采用电喷雾电离质谱考察了该离子液体在酯化反应中的作用.
Ionic liquids based on alkyl sulfate anions and alkyl sulfonate functionalized cations were prepared from commercially available and cheap materials and their thermal-instability properties were studied in detail. These ionic liquids were active catalysts for esterification and they gave moderate to high yields. The catalytic performance was found to be much better than that of conventional non-cation functionalized ionic liquids and close to sulfonic acid functionalized ionic liquids. The catalytic process in this reaction was investigated by electrospray ionization mass spectrometry and a plausible reaction mechanism is suggested.
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