Synthesis, structures and luminescence properties of three manganese coordination polymers with bis(1,2,4-triazol-1-ylmethyl)benzene

Three manganese coordination polymers [Mn(mbtz)2(dca)2(H2O)]n (1), [Mn(mbtz)2Cl2]n (2) and [Mn(mbtz)2(NCS)2]n (3) have been synthesized and characterized. There are two kinds of mbtz ligands in 1. One acts as bridging (bidentate) coordination mode. The other shows terminal (monodentate) coordination mode. The bridging mbtz ligands link the Mn(II) atoms to form the one-dimensional helical chain in 1, 2 and 3 are similar one-dimensional chain containing double bridges of mbtz ligand. 1, 2 and 3 all exhibit blue luminescent emissions maximum in the solid state at room temperature.