合成了一种基于salen 的分子笼,salen@cage,并与Co 和Al 络合以产生金属-salen 分子笼Co( II )@cage、Co( III )@cage 和Al( III )@cage。这些笼子被证明是用于 CO 2与氧化苯乙烯环加成的有效多相催化剂,在 25 °C 和 1 atm CO 2下实现完全转化。在温和的条件下,各种环状碳酸酯的产率也很好。Al( III )@cage 最多可重复使用五次,而不会显着降低其高催化活性。使用 salen@cage 获得多种非均相有机金属催化剂的能力为实用 CO 2提供了新的前景利用和化学制造。
Combined Experimental and Computational Study on Catalytic Cyclocoupling of Epoxides and CO<sub>2</sub> Using Porphyrin-Based Cu(II) Metal-Organic Frameworks with 2D Coordination Networks
The cyclocoupling of epoxides and CO2 was investigated using porphyrin-based Cu(II) metal-organicframeworks with 2D coordination networks. A variety of mono- and disubstituted epoxides were transformed into cyclic carbonates under mild and neat conditions. Several control experiments were carried out to elucidate that the catalytically active site is the dicopper paddle wheel unit rather than the
使用具有二维配位网络的卟啉基 Cu(II) 金属有机骨架研究了环氧化物和 CO2 的环偶联。各种单取代和双取代的环氧化物在温和纯净的条件下转化为环状碳酸酯。进行了几个对照实验以阐明催化活性位点是双铜桨轮单元而不是铜卟啉复合部分。模型桨轮单元的密度泛函理论计算证实了所提出的机制。