Ng Chee Koon, Toh Ren Wei, Lin Ting Ting, Luo He-Kuan, Hor T S Andy, Wu Jie
Department of Chemistry , National University of Singapore , 3 Science Drive 3 , Singapore 117543 , Singapore . Email:
Institute of Materials Research and Engineering , Agency for Science, Technology and Research , #08-03, 2 Fusionopolis Way, Innovis , Singapore 138634 , Singapore.
Chem Sci. 2018 Nov 29;10(5):1549-1554. doi: 10.1039/c8sc05019h. eCollection 2019 Feb 7.
A salen based molecular cage, salen@cage, was synthesized and complexed with Co and Al to yield metal-salen molecular cages, Co(ii)@cage, Co(iii)@cage and Al(iii)@cage. These cages were demonstrated to be efficient heterogeneous catalysts for the cycloaddition of CO with styrene oxide, achieving full conversion at 25 °C and 1 atm CO. Good to excellent yields of various cyclic carbonates were also achieved under mild conditions. Al(iii)@cage can be reused up to five times without any significant loss of its high catalytic activity. The capability to access a variety of heterogeneous organometallic catalysts with salen@cage offers new prospects for practical CO utilization and chemical manufacturing.
合成了一种基于双水杨醛缩乙二胺的分子笼（salen@cage），并使其与钴和铝络合，得到金属 - 双水杨醛缩乙二胺分子笼，即Co(ii)@cage、Co(iii)@cage和Al(iii)@cage。这些分子笼被证明是用于一氧化碳与环氧苯乙烯环加成反应的高效多相催化剂，在25℃和1个大气压的一氧化碳条件下可实现完全转化。在温和条件下，各种环状碳酸酯也能获得良好至优异的产率。Al(iii)@cage可以重复使用多达五次，而其高催化活性没有任何显著损失。利用salen@cage获得各种多相有机金属催化剂的能力为一氧化碳的实际利用和化学制造提供了新的前景。
