title: Auxiliary ligand-directed synthesis of a series of Cd(II)/Co(II) coordination polymers with methylenebis(3,5-dimethylpyrazole): syntheses, crystal structures, and properties.
abstract: Using a flexible methylenebis(3,5-dimethylpyrazole) ligand (H2MDP) with different aromatic carboxylate ligands, six new complexes {[Cd(H2MDP)(OPh)](H2O)}n (1), {[Cd(H2MDP)(MPh)](H2O)(1/10)}n (2), {[Cd(H2MDP)(PPh)](H2O)(3/2)}n (3), {[Co(H2MDP)(OPh)](H2O)2}n (4), {Co(H2MDP)(MPh)}n (5), {Co(H2MDP)(HBTC)}n (6) (H2OPh = phthalic acid, H2MPh = isophthalic acid, H2PPh = terephthalic acid, H3BTC = benzene-1,3,5-tricarboxylic acid) have been isolated under hydrothermal conditions. The crystal structure analyses reveal that complexes 1 and 4 feature two-dimensional undulated sheets with 4(4)·6(2) topology. Both complexes 2 and 3 contain M2L2-type metallocyclic motifs composed of two H2MDP ligands and two metal atoms, while complex 2 features a two-dimensional 4(4)·6(2) network constructed from binuclear cadmium units as four connected nodes, and complex 3 shows a two-dimensional network with 6(3)-hcb topology. Complex 5 affords a one-dimensional chain structure, and complex 6 shows a two-dimensional (4,4) network further connected into a 3D supramolecular structure connected by intermolecular hydrogen bonds and by π-π interactions. In addition, the luminescent properties of complexes 2 and 3 as well as the magnetic properties of 4 and 5 were studied.
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 35002, China. czlu@fjirsm.ac.cn.
authors.forename: Xiang-Guang
authors.initials: XG
authors.lastname: Guo
authors.forename: Wen-Bin
authors.initials: WB
authors.lastname: Yang
authors.forename: Xiao-Yuan
authors.initials: XY
authors.lastname: Wu
authors.forename: Qi-Kai
authors.initials: QK
authors.lastname: Zhang
authors.forename: Lang
authors.initials: L
authors.lastname: Lin
authors.forename: Rongmin
authors.initials: R
authors.lastname: Yu
authors.forename: Hui-Fen
authors.initials: HF
authors.lastname: Chen
authors.forename: Can-Zhong
authors.initials: CZ
authors.lastname: Lu