Five 1D to 3D Zn(ii)/Mn(ii)-CPs based on dicarboxyphenyl-terpyridine ligand: stepwise adsorptivity and magnetic properties

Abstract

Five coordination polymers, {[Zn(dtp)]·H₂O} (1), {[Zn(dtp)]·2CH₃OH·NMP} (2), {[Mn₂(dtp)₂(H₂O)₄]·12(H₂O)} (3), {[Mn(Hdtp)(Cl)]} (4) and {[Mn(dtp)(H₂O)]·1.5H₂O} (5) with different dimensional structures, have been solvothermally synthesized by utilizing the H₂dtp ligand (H₂dtp = 4′-(3,-5-dicarboxyphenyl)-2,2′:6′,2′′-terpyridine). All complexes are characterized by single-crystal X-ray diffraction, elemental analysis, IR spectra, thermogravimetric analysis (TGA) and powder X-ray diffraction (PXRD). The Zn(II)-based complexes 1 and 2 display a 2D wavy layer structure and a 3D porous framework with a 1D channel, respectively. The three Mn(II)-based complexes 3–5 exhibit two 1D chain and one 2D layer structures, respectively. Complexes 1 and 2 reveal their luminescence properties, whereas complexes 3–5 display an antiferromagnetic exchange. Meanwhile, an unusual stepwise adsorption for CO₂ was also observed in 2.