Structures, luminescence and magnetic properties of three 3D lanthanide–zinc heterometallic coordination polymers based on 3-amino-1,2,4-triazole and Oxalate

• Three 3D Ln(III)-Zn(II) 3d-4f heterometallic coordination polymers (HCPs) have been synthesized.
• Complexes 1 and 3 exhibit characteristic lanthanide-centered luminescence.

Three 3D Ln(III)–Zn(II) 3d-4f heterometallic coordination polymers (HCPs) constructed from the coligands 3-amino-1H-1,2,4-triazole and oxalate, {[Ln2Zn19(atz)18(ox)9(Cl)8]·17H2O}n(Ln = Eu 1, Gd 2, Tb 3, Hatz = 3-amino-1H-1,2,4-triazole, ox = oxalic acid) have been synthesized under hydrothermal conditions and characterized by elemental analysis, FT-IR, TG analysis and X-ray diffraction. X-ray diffraction analysis reveals that these complexes are isostructural and feature 3D pillar-layered coordination frameworks constructed by the linkages of 2D layers and 1D zigzag chains, possessing a 5-nodal net topology with Schläfli symbol of {32;52;62}3{33;44;57;65;72}6{33;45;55;6;7}6{36;415;56;6}2{53}4. In addition, the magnetic property of 2 and the luminescence properties of 1 and 3 were also investigated.

The neighboring 2D planars connected together into a 3D supramolecular architecture by Hatz ligand. All amino groups were omitted for clarity.Figure optionsDownload as PowerPoint slide