Synthesis, Characterization, and Luminescent Properties of a 3d Metal Coordination Polymer Based on Dicarboxylate Ligand and 1,10-Phenanthroline

Solvothermal reaction of MnSO4 with 2,2 '-dithiodibenzoic acid (H2L) and 1,10-phenanthroline (phen) in ethanol/DMF/H2O has resulted in a novel manganese coordination polymer [Mn(L)(phen)(H2O)(0.5)](n) (1). Compound 1 is built up of two chain structures derived from L2- ligands and Mn ions linked by coordination water molecules and the carboxylate groups of L2-. The L2- anions act as tridentate ligands bridging with Mn ions and generating a ladder-like structure comprised of left- and right-handed chains. In the solid state, compound 1 exhibits luminescence at 598 nm. In comparison with the free H2L ligand, compound 1 demonstrates 130 nm redshift, which can be attributed to charge transfer between ligands and metal ions. Compound 1 exhibits antiferromagnetic interactions between Mn ions.

Automated summary

A novel manganese coordination polymer was synthesized through solvothermal reaction of MnSO4 with 2,2'-dithiodibenzoic acid and 1,10-phenanthroline in ethanol/DMF/H2O. The resulting compound consists of two chain structures linked by coordination water molecules and carboxylate groups, with L2- ligands bridging Mn ions to form a ladder-like structure. In the solid state, the compound exhibits luminescence at 598 nm and a redshift of 130 nm compared to the free H2L ligand, indicating charge transfer between ligands and metal ions. The compound also shows antiferromagnetic interactions between Mn ions.