Chang Tao, Li Xiaopeng, Hao Yongjing, Kang Lianwei, Tian Tian, Fu Xiying, Zhu Zheng, Panchal Balaji, Qin Shenjun
Key Laboratory of CO2 Utilization of Handan City, College of Material Science and Engineering, Hebei University of Engineering Handan 056038 Hebei China
Key Laboratory of Heterocyclic Compounds of Hebei Province, Handan College Handan 056005 Hebei China.
RSC Adv. 2021 Sep 10;11(48):30222-30228. doi: 10.1039/d1ra05328k. eCollection 2021 Sep 6.
A new type of pyrene-based ammonium bromides (PABs) was synthesized the reaction of bromomethyl pyrene and tertiary amines with different alkyl chains combined with graphitic carbon nitride (g-CN) through π-π stacking interactions. The new pyrene-based ammonium bromides were investigated both in homogenous phase and heterogeneous phase combining with g-CN for the CO fixation reaction of epoxides under mild conditions. Obviously, the combination was proved to be an efficient system for the conversion of epoxides. The interaction between g-CN and PABs was confirmed by quantum chemical calculations. g-CN/Py-C exhibited an excellent yield of cyclic carbonates (above 93%) at 80 °C, atmospheric pressure and solvent-free conditions. A preliminary kinetic study was performed using g-CN/Py-C and the activation energy was calculated to be 61.5 kJ mol.
通过溴甲基芘与不同烷基链的叔胺反应合成了一种新型芘基溴化铵（PABs），并通过π-π堆积相互作用将其与石墨相氮化碳（g-CN）结合。研究了新型芘基溴化铵在均相和非均相条件下与g-CN结合用于温和条件下环氧化物的CO固定反应。显然，该组合被证明是一种用于环氧化物转化的高效体系。通过量子化学计算证实了g-CN与PABs之间的相互作用。在80°C、大气压和无溶剂条件下，g-CN/Py-C表现出优异的环状碳酸酯产率（高于93%）。使用g-CN/Py-C进行了初步动力学研究，计算得到的活化能为61.5 kJ/mol。
