Chia Nan University of Pharmacy & Science Institutional Repository:Item 310902800/32234
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    標題: 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
    貢獻者: 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
    關鍵字: tunable aryl-imidazolium Bronsted/Lewis magnetic ionic liquids
    magnetic susceptibility
    magnetic coupling constant
    hysteresis
    Bronsted/Lewis properties
    日期: 2018-12
    上傳時間: 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.
    link: http://dx.doi.org/10.3390/ma11122539
    關聯: International Journal of Molecular Sciences, v.11, n.12, 2539
    顯示於類別:[化妝品應用與管理系(所)] 期刊論文

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