Page 223 - 《精细化工》2021年第10期

第 10 期 蒋宇佳，等: 深共融溶剂催化制备二酯类化合物 ·2153·

2.4 深共融溶剂的表征 醇的反应活性较高。由于生成的二酯类化合物与
对 DESs（氯化胆碱/对甲苯磺酸）进行了 FTIR DESs 明显分层，移除上层二酯产品后剩余 DESs 能
表征，见图 2。如图 2 所示，与对甲苯磺酸的 FTIR 够循环使用，避免了废酸的排放，该方法具有环境
光谱相比，形成 DESs 后磺酸基上氢的谱峰大幅度 友好、操作简便等优点，在工业上具有很好的应用
向高波数移动，同时强度增加，谱带变宽，说明 DESs 前景。
中存在分子间氢键的相互作用。
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在该条件下，最高产率可达 95%，通过拓展反应底
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物发现，该反应对各种二元羧酸的适用性较好，伯 （下转第 2160 页）