Improved performance of the pyrimidine-modified porous In-MOF and anin situprepared composite Ag@In-MOF material

A stable porous In-MOF 1 was prepared for the first time via an asymmetric N,O-containing (2-pyrimidin-5-yl)terephthalic acid (H2L). It was found that the 1,4-benzenedicarboxylate anions (bdc2-) were formed in the synthesis process of 1. Thus, another new isomorphic In-MOF 2 was formed by employing the H2bdc ligand in the synthesis process of 1. More importantly, when adding AgNO3 in the synthesis process of 1 and 2, only composite Ag@1 was obtained via the in situ reduction of Ag(I) to Ag NPs without additional reducing agent. MOF 1 and Ag@1 had great sorption capacity; in particular, 1 had remarkable dynamic selectivity for C2H2/CH4 and CO2/CH4, and they were also efficient catalysts for fixing CO2 and epoxides. It is hoped that this work may supply an effective strategy to build stable MOFs and composite Ag@MOF materials with excellent multifunctional applications.