A Zn-Based Coordination Polymer with Homogeneous Catalyst Properties for Efficient CO₂ Fixation

Abstract

The development of efficient catalysts for the catalytic conversion of CO 2 is extremely important in the process of CO 2 chemistry. In this work, a Zn-based coordination polymer (ZnBr 2 -CP) was synthesized from a tridentate pyridine ligand bearing an imidazolium salt ligated with ZnBr 2 . It possesses not only the high activity of homogeneous catalysts but also the recoverable features of heterogeneous catalysts. More importantly, configured double active sites allow the catalyst ZnBr 2 -CP to exhibit excellent activity in the cycloaddition of CO 2 with epoxides under solvent-and co-catalyst-free conditions, achieving yields as high as 99% for a variety of cyclic carbonates at 80 °C for 24 h. This study provides insight into the design of efficient catalysts for conversion of CO 2 .

A2B2-Type Zinc(II) Porphyrin-Modified Organic Polymers with Flexible Linkers for Efficient Fixation of CO2 to Cyclic Carbonate

“…However, considering the thermodynamic stability and high kinetics of the CO 2 molecule, a catalyst is essential for efficient conversion of CO 2 to cyclic carbonate. , Currently, plentiful catalysts have been reported, for example, ionic liquids, − metallic oxides, metal–organic frameworks (MOFs), − and organic polymers. − In particular, organic polymers, as heterogeneous catalysts, are a kind of material composed of organic monomers linked by covalent bonds, which include covalent organic frameworks (COFs) . Taking advantage of high stability and easy separation, organic polymers have attracted tremendous attention and research.…”

The coupling reaction of epoxides with carbon dioxide catalyzed by functional cross-linked polystyrenes and metal salts/functional polystyrenes systems

“…However, this protocol is time-consuming and repeated tedious synthetic work is required for purification, which considerably hampers their large-scale use in practice. 28,29…”