Syntheses, topological networks and properties of four complexes based on 4-amino-3,5-bis(3-pyridyl)-1,2,4-triazole ligand

Abstract

Reactions of metal acetates with 4-amino-3,5-bis(3-pyridyl)-1,2,4-triazole (3-abpt) and co-ligands gave rise to four new complexes, namely [Zn 2(3-abpt)(beta)(DMF) (H 2O) 2] n · nH 2O ( 1), [Zn(3-abpt)(ip)] n ·3 nH 2O ( 2), [Zn(3-abpt)(ip)(H 2O) 2] n ·2 nH 2O ( 3), and [Cu 2(3-abpt) 2(C 6H 5COO) 4(H 2O) 2] n ·2 nH 2O ( 4) (ip = isophthalate, beta = 1,2,4,5-benzenetetracarboxylate). Compound 1 is a 3D coordination polymer with uncommon 3,4-connected (6 2.8) 2(6 2.8 2.10 2) network. Compounds 2– 4 are all 1D coordination polymers, which exhibit diversity structures. Compound 2 is a tubular-like chain, 3 is a ring-like network, and 4 is a zigzag chain. Their thermal stabilities and the photoluminescence of 1 have also been investigated.