Synthesis and Properties of Magnetic Aryl-Imidazolium Ionic Liquids with Dual Bronsted/Lewis Acidity

doi:10.3390/ma11122539

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题名:	Synthesis and Properties of Magnetic Aryl-Imidazolium Ionic Liquids with Dual Bronsted/Lewis Acidity
作者:	Chang, Jui-Cheng Yang, Che-Hsuan Sun, I-Wen Ho, Wen-Yueh Wu, Tzi-Yi
贡献者:	Natl Yunlin Univ Sci & Technol, Dept Chem & Mat Engn Natl Yunlin Univ Sci & Technol, Bachelor Program Interdisciplinary Studies Natl Cheng Kung Univ, Dept Chem Chia Nan Univ Pharm & Sci, Dept Cosmet Sci
关键词:	tunable aryl-imidazolium Bronsted/Lewis magnetic ionic liquids magnetic susceptibility magnetic coupling constant hysteresis Bronsted/Lewis properties
日期:	2018-12
上传时间:	2019-11-15 15:46:09 (UTC+8)
出版者:	MDPI
摘要:	A series of unique tunable aryl-imidazolium magnetic ionic liquids (MILs) with dual acidity that contain both Bronsted 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 Bronsted 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 Bronsted 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 Bronsted acidity, whereas those with an electron-donating group had higher Lewis acidity. This type of ionic liquid, with both Bronsted and Lewis acidic sites, is expected to be a useful solvent and catalyst for organic reactions.
???metadata.dc.relation.uri???:	http://dx.doi.org/10.3390/ma11122539
關聯:	International Journal of Molecular Sciences, v.11, n.12, 2539
显示于类别:	[Dept. of Cosmetic Science and institute of cosmetic science] Periodical Articles

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