Synthesis and properties of magnetic aryl-imidazolium ionic liquids with dual Brønsted/Lewis acidity

Jui Cheng Chang, Che Hsuan Yang, I. Wen Sun, Wen Yueh Ho, Tzi Yi Wu

研究成果: Article同行評審

4 引文 斯高帕斯(Scopus)

摘要

A series of unique tunable aryl-imidazolium magnetic ionic liquids (MILs) with dual acidity that contain both Brønsted and Lewis acidic sites (abbreviated as B-L MILs) were synthesized and characterized using nuclear magnetic resonance and mass spectrometry. Physical properties, such as thermal properties, magnetic susceptibility, and Brønsted and Lewis acidity, were measured. These properties were found to depend on the cation structure. These B-L MILs had good solubility in many organic solvents, good thermal stability, and low melting points, and exhibited magnet-like behavior. For these B-L MILs, the Brønsted acidity was measured using ultraviolet-visible (UV-Vis), and the Lewis acidity was measured using Fourier transform infrared spectroscopy (FTIR). The results showed that B-L MILs with an electron-withdrawing group in the aryl-imidazolium moiety had higher Brønsted acidity, whereas those with an electron-donating group had higher Lewis acidity. This type of ionic liquid, with both Brønsted and Lewis acidic sites, is expected to be a useful solvent and catalyst for organic reactions.

原文English
文章編號2539
期刊Materials
11
發行號12
DOIs
出版狀態Published - 2018 十二月 13

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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