Synthesis of Homo- and Heteronuclear Rare-Earth Metal Complexes Stabilized by Ethanolamine-Bridged Bis(phenolato) Ligands and Their Application in Catalyzing Reactions of CO<sub>2</sub> and Epoxides
作者:Linyan Hua、Baoxia Li、Cuiting Han、Pengfei Gao、Yaorong Wang、Dan Yuan、Yingming Yao
DOI:10.1021/acs.inorgchem.9b01169
日期:2019.7.1
complexes (1Y, 2Yb, 3Nd, and 4La) and heteronuclear RE–Zn complexes (1Y–Zn, 3Nd–Zn, and 5Sm–Zn) stabilized by ethanolamine-bridged bis(phenolato) ligands was prepared and structurally characterized. Heteronuclear complexes are assembled through bridging acetate ligands, and their formation and characterization add to the diversity of 3d–4f complexes. Their activities in mediating reactions of CO2 and epoxides
一系列稳定的同核稀土(RE)金属配合物(1 Y,2 Yb,3 Nd和4 La)和异核RE-Zn配合物(1 Y-Zn,3 Nd-Zn和5 Sm-Zn)稳定通过乙醇胺桥联的双(酚基)配体的制备和结构表征。异核复合物是通过桥接乙酸盐配体组装而成的,它们的形成和表征增加了3d–4f复合物的多样性。它们在介导CO 2反应中的活性和环氧化物进行评估和比较。异核RE-Zn配合物被发现可用于环己烯氧化物和CO 2的共聚,从而形成了乙酸酯基团封端的共聚物。同核络合物在催化各种单取代的环氧化物和CO 2(1 bar)的环加成反应中表现出良好的活性,生成环状碳酸酯,产率为65-96%。对于位阻双取代环氧化物,在10 bar CO 2的存在下可实现60-91%的良好收率。