Hydrothermal syntheses, crystal structures, and luminescent properties of two Mn(II) coordination polymers based on carboxylate and imidazole-containing ligands

Two new coordination polymers, [Mn(1,4-BDC)(bimb)(0.5)](n) (1) and [Mn(Hbtc)(bimb)(0.5)](n) (2) (1,4-H2BDC = 1,4-benzenedicarboxylic acid, H(3)btc = 1,3,5-benzenetricarboxylic acid and bimb = 1,4-bis (1-imidazol-yl)-2,5-dimethyl benzene), have been hydrothermally synthesized by reactions of Mn(II) salt with a rigid 1,4-bis(1-imidazol-yl)-2,5-dimethyl benzene and varying carboxylate ligands. Complex 1 is a binodal (3,7)-connected 3-D architecture with point symbol (4(4).6(17)).(6(3)). Complex 2 is a (3,6)-connected 3-D structure with point symbol (3.4.5).(3(2).4(2).5.6(3).7(2)). The luminescent properties of 1 and 2 were investigated in the solid state at room temperature.