Construction of a porous Cu(II)-coordinated framework for the catalytic properties of cycloaddition of carbon dioxide to epoxides

• Published in: Inorganic chemistry communications 2019-08, Vol.106, p.22-26
• Main Authors: Fei, Fei, Dou, Yong, Hao, Xiaoyun, Lan, Wenlong, Zhou, Zhen, Yang, Lu, Zhang, Daopeng
• Format: Article
• Language: English
• Subjects: Carbon dioxide; Cyclic carbonates; Heterogeneous catalysis; Metal-organic framework
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2019.05.024

A new porous material {[Cu2(acc)1.5(phen)2]}n (denoted as 1) was synthesized by the self-assembly of Cu(II) ions with two mixed ligands, 4-carboxycinnamic acid (H2acc) and phenanthroline (phen), and further structurally characterized. The single crystal X-ray diffraction indicated that 1 contained a two-dimensional network with bimetallic Cu(II) clusters. The magnetic susceptibility experiments showed the antiferromagnetic interactions between the two Cu(II) cores. Additionally, 1 could serve as an effective heterogeneous catalyst for cyclic carbonates reactions between epoxides and CO2, achieving a high yield of above 99% in a mild condition. A new Cu(II)-based coordination framework (1) has been sucessfully synthesized via the elaborate self-assembly of two mixed ligands as organic building block. The magnetic susceptibility experiments have studied to show the antiferromagnetic interactions between the two Cu(II) cores formed in 1. Additionally, the Cu(II) ions in 1 could perform as Lewis active sites to catalyze the cyclic carbonates reactions between epoxides and CO2 in a high yield under mild condition, and the large accessible pores showed size selectivity effect of the substrates. [Display omitted] •A new MOF constructed by Cu(II) ions with carboxylic and N-donor mixed ligands was reported.•The bimetallic Cu(II) cores of the reported MOF material shows antiferromagnetic interactions.•The cyclic carbonates catalysis between epoxides and CO2 have been studied using the reported MOF as heterogeneous catalyst.