Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (11): 1303-1309.DOI: 10.11944/j.issn.1000-0518.2016.11.160033

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Synthesis and Phenol Red Catalytic Bromination Activity of Polypyrazole Borate Oxovanadium Complex

FENG Xiaodong,LIN Xiaomen,WANG Yang,BAI Fengying(),XING Yongheng   

  1. College of Chemistry and Chemical Engineering,Liaoning Normal University,Dalian,Liaoning 116029,China
  • Received:2016-01-20 Accepted:2016-03-30 Published:2016-11-01 Online:2016-11-01
  • Contact: BAI Fengying
  • Supported by:
    upported by the National Natural Science Foundation of China(No.21571091, No.21371086)

Abstract:

Oxovanadium complex [VO(C6H9O2)(Tp4I)]·2H2O(Tp4I=tri-(4-lodopyrazole)borate) was designed and synthesized. The spectral and structural characters of the complex were analyzed by elemental analysis, IR spectroscopy, UV spectroscopy, thermogravimetric analysis, X-ray powder diffraction and single crystal X-ray diffraction analysis. The structural analysis shows that the complex has an octahedron geometry with hexa-coordinated metal. Ligand tri-(4-lodopyrazole)borate adopts a tridentate chelating coordination mode. The complex exhibits good catalytic activity in the mimic bromination of phenol red, and the reaction rate constant is 2.424×102 (mol/L)-2·s-1. Meanwhile, the reaction system was applied in the hydrogen peroxide determination.

Key words: oxovanadium complex, tri-(4-lodopyrazole)borate, crystal structure, mmimic catalytic bromination