Faculty of Science, Jan Evangelista Purkyně University in Ústí nad Labem, Pasteurova 15, 400 96 Ústí nad Labem, Czech Republic.
Molecules. 2023 Jul 5;28(13):5231. doi: 10.3390/molecules28135231.
In this study, three types of sulfonic acid group functionalized ionic liquids (SAILs) with a different number of catalytic groups and lipophilicity were synthesized and characterized by FT-IR, NMR, and MS analyses. Their catalytic activities were studied in a model esterification of oleic acid with ethanol; heating in a microwave reactor was also used. The experimental results indicated that SAIL, with the lipophilic alkyl chain, performed the best due to its increased solubility in the reaction mixture. Microwave heating was found to be more effective than conventional heating. Recycling experiments show that these novel SAILs can be reused without significant loss of the catalytic activity.
在这项研究中，我们合成并通过傅里叶变换红外光谱（FT-IR）、核磁共振（NMR）和质谱（MS）分析对三种具有不同催化基团数量和疏水性的磺酸基功能化离子液体（SAILs）进行了表征。我们在油酸与乙醇的酯化模型反应中研究了它们的催化活性，同时还使用了微波反应器进行加热。实验结果表明，疏水性烷基链的 SAIL 由于在反应混合物中的溶解度增加，表现出最佳的催化性能。研究还发现，微波加热比传统加热更为有效。回收实验表明，这些新型 SAIL 可以重复使用，而不会显著损失催化活性。
