Ni-2(BDC)(2)(DABCO) metal-organic framework for cyclic carbonate synthesis from CO2 and epoxides (BDC=1,4-benzendicarboxylic acid, DABCO=1,4-diazabicyclo[2.2.2]octane)

摘要

A Ni based metal organic framework Ni-2(BDC)(2)(DABCO) has been synthesized by using Ni(II) ions and BDC (1,4-benzendicarboxylic acid) and DABCO (1,4-diazabicyclo[2.2.2]octane) ligands under solvothermal conditions. The prepared catalyst has been analyzed using various physicochemical techniques such as PXRD, FT-IR, ICP-OES, XPS, NH3-TPD, CO2-TPD, and BET. The heterogeneous catalytic performance of synthesized catalyst in the cycloaddition of CO2 and epoxides was investigated without using any solvent under mild reaction conditions. The influence of various reaction parameters like CO2 pressure, catalyst amount, time, and temperature, has been studied. Ni-2(BDC)(2)(DABCO) was reused for five times without any considerable loss in the initial activity. Based on literature inferences and our previous studies, a plausible reaction mechanism for the cycloaddition reaction was also suggested.