Suzuki Shiori, Takeoka Yuko, Rikukawa Masahiro, Yoshizawa-Fujita Masahiro
Department of Materials and Life Sciences, Sophia University 7-1 Kioi-cho, Chiyoda-ku Tokyo 102-8554 Japan
RSC Adv. 2018 Apr 18;8(26):14623-14632. doi: 10.1039/c8ra01950a. eCollection 2018 Apr 17.
The conversion of cellulose into valuable chemicals has attracted much attention, due to the concern about depletion of fossil fuels. The hydrolysis of cellulose is a key step in this conversion, for which Brønsted acidic ionic liquids (BAILs) have been considered promising acid catalysts. In this study, using BAILs with various structures, their acidic catalytic activity for cellulose hydrolysis assisted by microwave irradiation was assessed using the Hammett acidity function ( ) and theoretical calculations. The glucose yields exceeded 10% when the values of the BAIL aqueous solutions were below 1.5. The highest glucose yield was about 36% in 1-(1-octyl-3-imidazolio)propane-3-sulfonate (Oimps)/sulfuric acid (HSO) aqueous solution. A long alkyl side chain on the imidazolium cation, which increased the hydrophobicity of the BAILs, enhanced the glucose yield.
由于对化石燃料枯竭的担忧，纤维素向有价值化学品的转化已引起广泛关注。纤维素水解是该转化过程中的关键步骤，布朗斯特酸性离子液体（BAILs）被认为是有前景的酸催化剂。在本研究中，使用具有各种结构的BAILs，通过哈米特酸度函数（ ）和理论计算评估了它们在微波辐射辅助下对纤维素水解的酸性催化活性。当BAIL水溶液的 值低于1.5时，葡萄糖产率超过10%。在1-(1-辛基-3-咪唑鎓)丙烷-3-磺酸盐（Oimps）/硫酸（HSO）水溶液中，最高葡萄糖产率约为36%。咪唑鎓阳离子上的长烷基侧链增加了BAILs的疏水性，提高了葡萄糖产率。
