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Articles by Fangfang Jian
Total Records ( 2 ) for Fangfang Jian
  Fangfang Jian , Jian Zheng , Pusu Zhao and YuFeng Li
  The title complex, [Co(II)(C7H10N2)2Cl2], has been synthesized and characterized by elemental analysis, UV-vis spectra and X-ray single crystal diffraction. It crystallizes in the monoclinic system, space group P2/c, with lattice parameters a = 8.1370(16) Aring, b = 6.4990(13) Aring, c = 16.416(5) Aring, β = 98.99(3)° and Z = 2. The crystal structure of the title compound consists of monomeric molecules of [Co(II)(C7H10N2)2Cl2] with C2 symmetry and the two-fold axis through the Co(II) ion and the mid-point of two Cl- anions. TG/DTG data indicate that thermal decomposition of the compound takes place in two steps and the residue is Co. Density functional theory (DFT) calculations of the structure, electronic spectra, natural population analysis and the thermodynamic properties at different temperatures have been performed. The calculated results show that electronic transitions are mainly derived from the contribution of an intraligand (IL) π → π* transition, metal-to-ligand charge transfer (MLCT) and d-d transition. Bond strength of Co-Cl is stronger than that of Co-N, which agrees with the experimental data. The correlation equations of the thermodynamic properties of C0p,m and Sm0 with temperature are also obtained.
  Ruirui Zhuang , Fangfang Jian and Kefei Wang
  This study reports on the synthesis, characterization, and performance of a new dinuclear cobalt(III) thioxanthate complex of [Co2(μ-SC2H4OH)2(HOC2H4SCS2)4] as an electrocatalyst for trichloroacetic acid (TCA) and bromate reduction. Its structure was characterized by X-ray crystallography and elemental analysis. The structure contains two different anions of 2-sulfanylethanol thioxanthate and 2-sulfanylethanol. The electrochemical behavior and the electrocatalysis of the cobalt complex bulk-modified carbon paste electrode have been studied by cyclic voltammetry. It shows good electrocatalytic activities toward the reduction of TCA and bromate. The values for the detection limit and the sensitivity are 0.06 µmol L-1 and 19.40 µA µmol L-1 for TCA detection and 0.01 µmol L-1 and 177.6 µA µmol L-1 for bromate detection, respectively. This modified electrode exhibits good reproducibility, high stability, low detection limit and technical simplicity, and allows a possibility for rapid preparation, which is important for practical applications.
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