Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (1): 76-83.DOI: 10.11944/j.issn.1000-0518.2016.01.150199

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Synthesis, Structure and Catalytic Properties of the Keggin-type Silicomolybdenate-based Silver Compound Modified by a Bis-pyridyl-bis-amide Ligand

LIN Hongyan(),ZENG Ling,WANG Qinglin,LIU Guocheng,TIAN Yuan   

  1. College of Chemistry and Chemical Engineering,Bohai University,Jinzhou,Liaoning 121013,China
  • Received:2015-06-15 Accepted:2015-10-08 Published:2016-01-05 Online:2016-01-05
  • Contact: LIN Hongyan
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21501013, No.21401010)

Abstract:

A new Keggin-type polyoxometalate-based silver compound constructed from a semi-rigid bis-pyridyl-bis-amide ligand 3-bpcd(N,N'-bis(pyridin-3-yl)cyclohexane-1,4-dicarboxamide), {[Ag2(3-bpcd)3][Ag(3-bpcd)(SiMo12O40)]2(3-H2bpcd)2}·7H2O was prepared under the hydrothermal condition and characterized by IR, element analysis and X-ray single-crystal diffraction. The title complex is a triclinic system with space group P-1, whose cell parameters are a=1.3597(5) nm, b=1.4949(5) nm, c=2.5249(10) nm, α=88.998(6)°, β=88.856(7)°, γ=67.458(6)°, V=4.739(3) nm3, Mr=6471.02, Dc=2.261g/cm3, Z=1, S=0.955, F(000)=3124, R1=0.0768, wR2=0.1936. In this compound, a [Ag(3-bpcd)(SiMo12O40)]26- one-dimensional chain, a dinuclear [Ag2(3-bpcd)3]2+ structure unit and two non-coordinated protonated organic ligands 3-bpcd coexists. These structural units are extended into the three-dimensional supramolecular network by the hydrogen bonding interactions. The title complex modified carbon paste electrode displays good electrocatalytic activity toward NO2- reduction. Additionally, this complex possesses a remarkable photocatalytic ability for the degradation of Rhodamine B(RhB) dye. CCDC:1401875.

Key words: polyoxometalate, compound, crystal structure, electrocatalytic property, photocatalytic activity