A biopolymer mediated efficient synthesis of cyclic carbonates from epoxides and carbon dioxide
作者:Kuruppathparambil Roshith Roshan、George Mathai、Juntae Kim、Jose Tharun、Gyung-Ah Park、Dae-Won Park
DOI:10.1039/c2gc35942a
日期:——
dioxide with propylene oxide (PO) resulting in propylene carbonate (PC) under mild and solvent free conditions. A new pathway was proposed based on the density functional theory (DFT) calculations performed at the B3LYP/6-31G (d,p) level, where the carboxyl and hydroxyl moieties on the CMC were found to act synergistically with the halide ions to eventuate in the cycloaddition reaction. The carboxyl
羧甲基纤维素(CMC)是纤维素家族的同类产品的有前途的应用,可作为各种咪唑基的支撑材料 离子液体 催化剂在这里已经研究了CO 2的化学固定过程。这离子液体 固定在羧甲基纤维素(CMIL)上表现出较高的催化活性和对二氧化碳环加成的选择性。 环氧丙烷 (PO)在温和的条件下生成碳酸亚丙酯(PC) 溶剂免费条件。根据在B3LYP / 6-31G(d,p)水平进行的密度泛函理论(DFT)计算,提出了一条新途径,其中发现CMC上的羧基和羟基部分与CMC协同作用。卤离子最终导致环加成反应。据推测,羧甲基纤维素载体上的羧基实体通过强大的氢键稳定了产物配合物,从而促进了反应。该催化剂体系还显示出良好的可重复使用性。