Design and synthesis of effective catalysts for the conversion of epoxy compounds to cyclic carbonate under the presence of carbon dioxide molecules is essential for the utilization of carbon dioxide. Herein, we report that the surface-attached imidazolium-type poly(ionic liquid) bearing amine moieties is an efficient catalyst for the conversion of epoxy compound and carbon dioxide to cyclic carbonate. The effect of chemical structure of the synthesized catalyst and the reaction conditions on the catalytic efficiency is systematically studied. The results show that the catalyst with bromide anion can effectively catalyze the reaction under 1.5 MPa carbon dioxide pressure at 120 °C with the catalyst content of 10 mg mL⁻¹, reaching the conversion rate up to 90 %. Moreover, the synthesized catalyst can be separated from the cyclic carbonate products by centrifugation. The recyclability and reversibility measurements reveal that the decay of the catalytic activity is mainly resulted from the adsorption of the cyclic carbonate products on the catalysts. The catalytic activity of the synthesized catalyst towards conversion of epichlorohydrin and carbon dioxide to cyclic carbonate can be recovered after extraction of the adsorbed cyclic carbonate products.

设计和合成在二氧化碳分子存在下将环氧化合物转化为环状碳酸酯的有效催化剂对利用二氧化碳至关重要。在此，我们报道带有胺部分的表面连接的咪唑型聚离子液体是将环氧化合物和二氧化碳转化为环状碳酸酯的有效催化剂。系统地研究了合成催化剂的化学结构和反应条件对催化效率的影响。结果表明，含溴阴离子的催化剂可以在120℃，1.5 MPa二氧化碳压力下有效催化反应，催化剂含量为10 mg mL ^-1，达到高达90％的转化率。而且，可以通过离心将合成的催化剂与环状碳酸酯产物分离。可循环性和可逆性测量表明，催化活性的下降主要是由于环状碳酸酯产物在催化剂上的吸附所致。提取吸附的环状碳酸酯产物后，可以恢复合成催化剂对表氯醇和二氧化碳转化成环状碳酸酯的催化活性。