Series of 2D and 3D Coordination Polymers Based on 1,2,3,4-Benzenetetracarboxylate and N-Donor Ligands: Synthesis, Topological Structures, and Photoluminescent Properties

Nine new coordination polymers, namely, [Mn2(L)(H2O)4]·H2O (1), [Cd(L)0.5(H2O)] (2), [Zn5(L)2(μ3-O)2(H2O)4]·2H2O (3), [Zn4(L)2(μ3-O)2][Zn(H2O)5]·2H2O (4), [Zn2(L)(biim-4)0.5(H2O)3]·H2O (5), [Cd2(L)(bpy)(H2O)]·2H2O·0.5(CH3CH2OH) (6), [Cu2(H2L)2(bpy)2] (7), [Cu2(L)(bpy)(H2O)] (8), and [Cu2(L)(bpy)1.5(H2O)2.5] (9), where H4L = 1,2,3,4-benzenetetracarboxylic acid, biim-4 = 1,1′-(1,4-butanediyl)bis(imidazole), and bpy = 4,4′-bipyridine, have been synthesized under hydrothermal conditions. Compound 1 displays a rare trinodal (3,4,7)-connected (42·6)(45·6)(47·68·86) topology. 2 possesses an α-Po net. 3 is a novel 3D framework based on pentanuclear ZnII clusters. By adjustment of the pH values of the reaction mixture of 3 with a Na2CO3 solution, a structurally different compound, 4, was obtained, which exhibits a 3D porous framework with the [Zn(H2O)6]2+ cations located in the channels. 5 is an unusual example of a trinodal (3,5)-connected network with a Schlafli symbol of (42·6)(62·8)(42·62·85·10), whereas 6, co...