Three‐Dimensional Co‐ and Mn‐MOFs Containing a C_2h‐Symmetric Terphenyl‐3,3′‐dicarboxylate Linker and Their Magnetic Properties

Abstract

We report herein two new isostructural, three-dimensional (3D) MOFs with the general formula [M(3,3′tpdc)(dmf )] [M = Co II (I), Mn II (II)] resulting from the assembly of a metal ion and the C 2h -symmetric ditopic bridging ligand terphenyl-3,3′-dicarboxylate (3,3′-tpdc). Both isostructural MOFs crystallize in the monoclinic space group C2/c. The metal ion is coordinated by four O carboxylate (η 1 :η 1 :μ 2 ) and two μ 2 -O dmf atoms in a distorted octahedral geometry. The metal centers are interconnected through bridging 3,3′-tpdc and dmf ligands to form a 1D chain. The resulting 1D metal chains are further interconnected by 3,3′-tpdc ligands to form 3D frameworks without porosity. The thermolabile dmf bridging ligands were easily removed by heating at 180°C under vacuum for 5 h. The acti- [a]