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| 標題: | Novel Aryl-Imidazolium Ionic Liquids with Dual BrOnsted/Lewis Acidity as Both Solvents and Catalysts for Friedel-Crafts Alkylation |
| 作者: | Yang, Che-Hsuan
Chang, Jui-Cheng
Wu, Tzi-Yi
Sun, I-Wen
Wu, Jun-Hao
Wen-Yueh Ho(何文岳) |
| 貢獻者: | Natl Cheng Kung Univ, Dept Chem
Natl Yunlin Univ Sci & Technol, Bachelor Program Interdisciplinary Studies
Natl Yunlin Univ Sci & Technol, Dept Chem & Mat Engn
Chia Nan Univ Pharm & Sci, Dept Cosmet Sci |
| 關鍵字: | tunable aryl-imidazolium BrOnsted-Lewis magnetic ionic liquids
dual BrOnsted-Lewis acidity
Friedel-Crafts alkylation
homogeneous catalysis
para-substitution
mesomeric effect |
| 日期: | 2019-11 |
| 上傳時間: | 2020-07-29 13:54:06 (UTC+8) |
| 出版者: | MDPI |
| 摘要: | Featured Application In this study, we demonstrate the utility of the tunable aryl-imidazolium magnetic ionic liquids with dual functions as a solvent-catalyst and dual BrOnsted-Lewis acidity for the Friedel-Crafts alkylation reaction of p-xylene with benzyl chloride. Abstract Unique tunable aryl-imidazolium magnetic ionic liquids with dual functions as a solvent-catalyst and dual BrOnsted-Lewis acidity (B-L MILs) are applied for Friedel-Crafts alkylation without additional solvents. The catalytic properties of these B-L MILs in the Friedel-Crafts alkylation of p-xylene with benzyl chloride are investigated. The various reaction parameters, including the catalyst dosage, reaction time, reaction temperature, molar ratio of reactants, and reusability, are discussed. The results show that the B-L MIL 5c has more excellent product selectivity (>99%) and reactant conversion (>99%) under the following optimum conditions (reaction temperature = 80 degrees C, reaction time = 0.5 h, molar ratio of p-xylene to benzyl chloride = 6:1, and catalyst 5c dosage = 1.0 mole %) than traditional catalysts reported in the previous literature. Specifically, due to the mesomeric effect between the FeCl4 anion and hydrogen atom at cationic moiety, the catalyst B-L MILs with the molar fraction of FeCl3 equal to 0.5 can be easily recovered and provide satisfactory catalytic activity after being re-used six times. |
| 關聯: | Applied Sciences-Basel, v.9, n.22, 4743 |
| 顯示於類別: | [化妝品應用與管理系(所)] 期刊論文
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