Kim Dong-Woo, Park Dae-Won
J Nanosci Nanotechnol. 2014 Jun;14(6):4632-8. doi: 10.1166/jnn.2014.8237.
Bis(alkylimidazole) complexes of zinc, (RIm)2ZnX2, were prepared by a metal insertion reaction. The synthesized (RIm)2ZnX2 exhibited good catalytic performance during synthesis of glycerol carbonate (GC) from glycerol and urea. (HEIm)2ZnCl2 with a hydroxyl group exhibited the highest GC yield during glycerolysis of urea owing to incorporation of acid-base bifunctional active sites. (EIm)2ZnX2 catalysts based on different halide anions showed increased reactivity as Cl- < Br- < I-, which is the order of nucleophilicity. The effects of reaction parameters such as temperature, reaction time, catalyst loading, and degree of vacuum on the reactivity were also investigated.
锌的双（烷基咪唑）配合物（RIm）₂ZnX₂通过金属插入反应制备。合成的（RIm）₂ZnX₂在由甘油和尿素合成碳酸甘油酯（GC）的过程中表现出良好的催化性能。带有羟基的（HEIm）₂ZnCl₂由于引入了酸碱双功能活性位点，在尿素甘油解过程中表现出最高的GC产率。基于不同卤离子的（EIm）₂ZnX₂催化剂的反应活性随着Cl⁻＜Br⁻＜I⁻增加，这是亲核性的顺序。还研究了温度、反应时间、催化剂负载量和真空度等反应参数对反应活性的影响。
