Two Isomeric Magnesium Metal–Organic Frameworks with [24-MC-6] Metallacrown Cluster

Abstract

Two novel Mg-based metal–organic framework isomers with the formula [Mg 2 (HCO 2 ) 2 (NH 2 -BDC)(DMF) 2 ] n (NH 2 -BDC = 2-amino-1,4-benzenedicarboxylate) have been synthesized based on a 6-connected [24-MC-6] metallacrown secondary building unit (SBU), which display a two-dimensional (2D) 3 6 net ( 1 ) and three-dimensional primitive rhombohedral net ( 2 ) derived from a different extended orientation of SBU, respectively. The 2D framework of 1 exhibits relevant thermal stability, solvents stability, high CO 2 adsorption, and strong luminescent properties.