R-phenyldicarboxyl (RÂ =Â H, NO2 and COOH) modular effect on Ni(II) coordination polymers incorporated with a versatile connector 1H-3-(3-pyridyl)-5-(4-pyridyl)-1,2,4-triazole

► We synthesized nickel coordination compounds with co-ligands of 3,5-bis (4-pyridyl)-1H-1,2,4-triazole (3,4′-Hbpt) and R-phenyldicarboxyl. ► The titled coordination compounds were structurally characterized. ► The effect of non-coordination group (R = H, NO2 and COOH) on coordination compound has been investigated.