Chemical Research in Chinese Universities ›› 2015, Vol. 31 ›› Issue (4): 489-497.doi: 10.1007/s40242-015-5104-4

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Hydrothermal Synthesis, Structure and Property of Transition Metal(Mn, Zn, Cd or Pb) Coordination Frameworks Using Quinoline-8-oxy-acetate Acid and Dicarboxylic Acid as Ligands

ZHANG Guochun1, QIAO Chengfang1,2, LIANG Jiehui2, WEI Qing2, XIA Zhengqiang2, CHEN Sanping2   

  1. 1. Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources, College of Chemical Engineering and Modern Materials, Shangluo University, Shangluo 726000, P. R. China;
    2. Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, P. R. China
  • Received:2015-03-16 Revised:2015-04-30 Online:2015-08-01 Published:2015-05-11
  • Contact: WEI Qing, CHEN Sanping E-mail:weiqq@126.com;sanpingchen@126.com
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.21373162, 21073142, 21173168, 21127004, 21273171), the Natural Science Foundation of the Department of Education of Shaanxi Province, China(Nos.11JS110, 2010JK882, 2010JQ2007, 08JK459, 11JK0578) and the Natural Science Foundation of Shangluo University, China(Nos.12SKY012, 13SKY-FWDF006).

Abstract:

Five transition metal coordination compounds, [Mn2(8-qoac)2(bdc)(H2O)4](1)(8-qoacH=quinoline-8-oxy- acetate acid, H2bdc=benzene-1,4-dicarboxylic acid), [Zn4(8-qoac)4(bdc)2]n(2), {[Cd2(8-qoac)2(Hip)2(H2O)2]· (H2O)4}n(3)(H2ip=benzene-1,3-dicarboxylic acid), [Pb3(8-qoac)2(bdc)1.5(H2O)Cl]n(4) and [Zn2(8-qoac)(8-ql)(bdc)]n (5)(8-Hql=8-hydroxyquinoline), were synthesized by hydrothermal syntheses of metal salts with benzenedicarboxy- lic acid and 8-qoacH. Compound 1 possesses a discrete dimer bridged by bdc2- ligand. Compound 2 presents a 2D layer network constructed from bdc2- linkers and 1D infinite ribbons, in which Zn(II) centers are bridged by 8-qoac- with a tetradentate binding mode. Compound 3 displays a 1D zigzag chain, with adjacent chains further connected via extensive O—H···O hydrogen bonds to generate a 3D supramolecular structure. Compound 4 shows a 3D framework containing trinuclear lead secondary building units and bdc2- linkers, in which a new coordination mode of 8-qoac- ligand is observed. In compound 5, Zn(II) ions are simultaneously bridged by 8-qoac-, 8-ql- and bdc2- ligands to form tetranuclear zinc units, which are further interlinked by bdc2- linkers to yield a 2D wave-like layer. Based on intraligand(IL)(π-π*) fluorescent emission, compounds 15 possess strong purple fluorescent emissions. In addition, the thermal stabilities of compounds 1―5 were studied.

Key words: Coordination compound, Quinoline-8-oxy-acetate acid, Crystal structure, Photoluminescence property