Two Designed Bimetallic Sod-Zmofs with Ample Active Sites for Co2 Capture and Co2 Cycloaddition

Abstract

A template-free “vertex-locked” strategy for designing and synthesizing sod topology ZMOFs was put forward in this article. Based on the “vertex-locked” strategy, two isomorphic bimetallic sod-ZMOFs, named JLU-MOF199 and JLU-MOF200, were successfully designed and synthesized without using organic template. The two sod-ZMOFs were constructed with 4-connected copper paddlewheel cluster, 4-connected indium building units and 4-connected organic ligand. Meanwhile, JLU-MOF199 and JLU-MOF200 possess high porosity, large pore size, ample open metal sites and Lewis base sites. Eventually, both sod-ZMOFs exhibit excellent CO2 capture and the ability to catalyze the cycloaddition of CO2 with propylene oxide and epichlorohydrin. The recycling circulation experiments demonstrated that JLU-MOF199 and JLU-MOF200 show outstanding recyclability and catalytic stability. Therefore, JLU-MOF199 and JLU-MOF200 are expected to be good materials for capturing CO2 and catalysing CO2 cycloaddition reaction.

Keywords: Bimetallic metal-organic frameworks, sod-topology zeolite metal-organic frameworks, CO2 capture, CO2 Cycloaddition