%0 Journal Article %A Dongmei LIU %A Yajing SU %A Shanshan LI %A Qiwei XU %A Xia LI %T Transition Metal Coordination Polymers Constructed by 4-(4-Carboxyphenoxy)isophthalic Acid: Synthesis, Crystal Structure, Fluorescence Sensing and Photocatalysis %D 2020 %R 10.7503/cjcu20190493 %J Chemical Journal of Chinese Universities %P 253-261 %V 41 %N 2 %X

Four new transition metal coordination polymers, [Zn(Hcpoia)(2,2'-bpy)·H2O]n(1) and [M(Hcpoia)(phen)]n·nH2O[M=Zn(2), Mn(3), Co(4); H3cpoia=4-(4-carboxyphenoxy)isophthalic acid; 2,2'-bpy=2,2'-bipyridine; phen=1,10-phenanthroline], were synthesized by hydrothermal method and characterized by X-ray single crystal diffraction(XRD). Complex 1 features a one-dimensional chain structure, and Zn 2+ ions adopt a [ZnO4N2] distorted octahedral configuration. Zn 2+ ions are linked by Hcpoia 2- ligands through μ1η 1η 0 and μ1η 1η 1 coordination modes. The structures of complexes 2 and 4 are similar to that of complex 1 with one-dimensional chain structure, which is formed by Hcpoia 2- ligands connecting [MO4N2] structural units through μ1η 1η 0/μ1η 1η 1 coordination modes. The one-dimensional chains of complexes 1, 2 and 4 are developed into two-dimensional structures by intermolecular hydrogen bonds. Complex 3 has a two-dimensional network structure, in which Mn 2+ ions take a [MnO4N2] distorted octahedral configuration. Hcpoia 2- ligands link adjacent Mn 2+ ions through μ1η 1η 0 and μ1η 1η 1 coordination modes to form [Mn2COO2] binuclear units. The binuclear units are connected by Hcpoia 2- ligands to form a two-dimensional structure. In complexes 1—4, both 2,2'-bpy and phen ligands as terminal groups chelate to metal ions. The effects of antibiotics and Fe 3+ ions in aqueous solution on the fluorescence intensity of complex 1 were studied. The results show that metronidazole and Fe 3+ ions exert quenching effects on fluorescence of complex 1. The effects of various concentrations of metronidazole and Fe 3+ ions on the fluorescence intensity of complex 1 were further studied. Based on the fluorescence quenching mechanism, complex 1 can be used as a fluorescence sensor for detection of metronidazole and Fe 3+ ions in aqueous solution. The catalytic performance of complex 4 on RhB was studied. The experimental results show that complex 4 has good photocatalytic degradation of RhB in the presence of hydrogen peroxide and xenon lamp irradiation.

%U http://www.cjcu.jlu.edu.cn/EN/10.7503/cjcu20190493