Hybrid Inorganic-Organic Framework as Efficient Heterogeneous Catalyst for the Synthesis of Allyl Glycidyl Carbonate from CO_2 and Allyl Glycidyl Ether

摘要

A mixed-linker nanoporous coordination polymer Zn_2(HIP)_2(bipy)(H_2O)_2 · H_2O (ZnHipBipy) constructed from polyfunctional linker 5-hydroxy isophthalic acid (HIP) and exo-bidentate ligand 4,4'-bipyridyl (bipy) was employed as heterogeneous catalyst for allyl glycidyl carbonate (AGC) synthesis from CO_2 and allyl glycidyl ether (AGE) under solventless conditions. Besides being the organic linker, 5-hydroxy isophthalic acid enriches the functionality of the material through accessible hydroxyl group capable of contributing extensive hydrogen bonding interactions. The cycloaddition of CO_2 and epoxide was catalyzed through a synergistic pathway offered by inherent hydroxyl group together with the catalytically active metal centre. Method of synthesis and texture of the catalyst were key factors in determining the conversion and selectivity. The effects of reaction parameters like catalyst amount, temperature, CO_2 pressure and reaction time on the yield of AGC were also studied.