Syntheses, structures, and properties of two- and three-dimensional coordination polymers based on bis(imidazole) and glutarate ligands

2-D and 3-D coordination polymers based on bis(imidazole) and glutarate ligands were synthesized. Two new coordination polymers, [Zn(bix)(0.5)(glu)](n) (1) and {[Co(bix)(glu)]center dot 4H(2)O}(n) (2), were synthesized (bix = 1,4-bis(2-methylimidazol-1-ylmethyl)benzene, glu = glutarate). In 1, each Zn(II) is connected by four glu ligands and extend to form a [Zn(glu)](n) 2-D network. Adjacent [Zn(glu)](n) 2-D networks are bridged by bix ligands to construct a 6-connected 3-D network based on the Zn-2 unit. 2 shows an undulated 2-D (4,4) network. The interesting structural feature of 2 is that there are 1-D water chains. The O-H center dot center dot center dot O hydrogen bond interactions link the 2-D coordination networks and construct the 3-D supramolecular architecture in 2. The glu ligands are bis-(bidentate) bridges in 1 and bis-(monodentate) bridges in 2. The luminescence of 1 and thermal stability of 1 and 2 were investigated.