Understanding Microwave-Assisted Lignin Solubilization in Protic Ionic Liquids with Multiaromatic Imidazolium Cations,ACS Sustainable Chemistry & Engineering

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Understanding Microwave-Assisted Lignin Solubilization in Protic Ionic Liquids with Multiaromatic Imidazolium Cations
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-01-27 00:00:00 , DOI: 10.1021/acssuschemeng.7b04535
Omar Merino ₁ , Gabriela Fundora-Galano ₂ , Rafael Luque ₃ , Rafael Martínez-Palou ₁

Affiliation

The low solubility of lignin in most common solvents remains a significant challenge to be solved for its use and recovery. In this work, 18 novel protic ionic liquids (ILs) containing aromatic-substituted imidazolium cations and methanesulfonate and p-toluenesulfonate anions were synthesized and evaluated for lignin dissolution under microwave irradiation. ILs containing methanesulfonate demonstrated good lignin dissolving capacities, which can facilitate its separation and structural modifications to carry out their recovery under relatively mild and environmentally friendly conditions (few minutes, 90 °C). DFT theoretical calculations provided additional insights into the high lignin dissolution observed for the best performing ILs.

中文翻译：

了解具有多芳族咪唑阳离子的质子离子液体中的微波辅助木质素增溶

木质素在大多数普通溶剂中的低溶解度仍然是其使用和回收需要解决的重大挑战。在这项工作中，合成了18种含有芳香族取代的咪唑鎓阳离子和甲磺酸根和对甲苯磺酸根阴离子的新型质子离子液体（ILs），并在微波辐射下评估了木质素的溶解。含有甲磺酸盐的IL表现出良好的木质素溶解能力，可以促进其分离和结构修饰，从而在相对温和且环境友好的条件下（几分钟，90°C）进行回收。DFT理论计算为观察到的最佳性能IL的高木质素溶解提供了更多的见解。

更新日期：2018-01-27

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