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Vanadium Haloperoxidases Model Compounds: Synthesis, Structural Characterization and Mimic Catalytic bromination activity of [VO(C_2O_4)(2,2′-bipy)(H_2O)]·C_2H_5OH and VO(C_2O_4)(phen)(H_2O)

引用

Chemical Research in Chinese Universities 2012年第5期28卷 768-774页

作者： REN Dong-xue CAO Yun-zhu CHEN Chen XING Yong-heng College of Chemistry and Chemical Engineering Liaoning Normal UniversityDalian 116029R R.China

Two oxo-vanadium（IV） complexes, [VO（C2O4）（2,2′-bipy）（H2O）]·C2H5OH（1） and VO（C2O4）（phen）（H2O）（2）, where 2,2′-bipy=2,2′-bipyridyl, phen=1,10-phenanthroline, were synthesized as potential functional models of vanadium haloperoxidases（VHPOs） in mixed solvent of ethanol and water at room temperature. The complexes were characterized by elemental analysis, infrared（IR）, UV-Vis and X-ray crystallography. Structural analyses showed that vanadium atom was coordinated by a terminal oxygen, one oxygen atom from coordinated water, two oxygen atoms from the carboxylate group of oxalic acid, and two nitrogen atoms（N1 and N2） from 2,2′-bipy/phen. Central vanadium atoms in complexes 1 and 2 were both in a distorted-octahedral environment, and some intermolecular hydrogen bonding linkages were also observed in each complex. bromination reaction activity of the two complexes was evaluated with phenol red as organic substrate in the presence of H2O2, Br-and phosphate buffer, indicating that they can be considered as a potential functional model of VHPO. In addition, thermal analysis was also performed and discussed in detail.

关键词： Oxo-vanadium complex bromination reaction activity Vanadium haloperoxidase

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