Research Of Coordination Polymers Based On N-containing Tricarboxylic Acid

Ten new coordination polymers have been synthesized under hydrothermal conditions,namely,[Co3(L)2(H2O)3]·2H2O (1),[Zn3(L)2(H2O)3]·2H2O (2),[Co3(L)2(4,4’-bipy)2(H2O)4](3),[Ni3(L)2(pbib)3(H2O)2]·4H2O (4),[Co3(L)2(bbtz)2(H2O)6]·2H2O (5),[Ni3(L)2(bbtz)2(H2O)6]·2H2O (6)[Zn3(L)2(bbtz)2(H2O)6]·2H2O (7),[Co3(L)2(pbib)2(H2O)4]·4H2O (8),[Co3(L)2(biim-4)2(H2O)4]·4H2O (9), and[Ni(L)(H2O)2]·H2O (10), where H3L=2’-carboxybiphenyl-4-ylmethylaminodiacetic,4,4’-bipy=4,4’-bipyridine, pbib=1,4-bis(imidazole-1-ylmethyl)-benzene,bbtz=1,4-bis(1,2,4-triazol-1-ylmethyl)benzene, and biim-4=1,1’-(1,4-butanediyl)bis(imidazole).Their structures were characterized by single-crystal X-ray diffraction. Compounds1and2are isomorphours, and show the same3D (3,4)-connected net with the (4·102)(4·85) topology.Compound3displays a typical3D (3,4)-connected net with the (4·10·12)2(10·11·124)topology. Compound4reveals a3D (3,6)-connected net with the (4·62)2(64·88·103) topology.Compounds5-7are also isomorphous, and feature crystallographically distinct chains.Neighboring chains are stacked by π π interactions to form2D supramolecular layers, whichare further extended by hydrogen-bonding interactions to form a3D supramoleculararchitecture. Compounds8and9are essentially isomorphous with5, and exhibitcrystallographically distinct1D chain structures. Adjacent chains are further extended into a3D supramolecular architecture by hydrogen-bonding interactions. Compound10shows1Dchains, which are further linked by intermolecular hydrogen bonding interactions to generatea2D supramolecular layer. The thermal behaviors of some compounds and luminescentproperties, properties of sensing small molecules have been studied. The stability andporosity after removal of guest water molecules also have been investigated.