Synthesis, Structure and Mimic Haloperoxidase Catalytic Activity of Peroxovanadium Complexes

Abstract

Based on mimicking the environment of the active center of vanadium haloperoxidase( V-HPOs),we designed and synthesized two kinds of peroxovanadium complexes: Na[VO( O2)2( C10H8N2) ]·8H2O( 1)and K3H [( VO)2( O2)4( μ2-O) ]·H2O( 2),which were structurally characterized by X-ray single crystal diffraction,elemental analysis,IR and UV-Vis spectroscopies. Structural analyses reveal that complex 1crystallized in an triclinic system with space group P-1,a = 0. 7213( 2) nm,b = 1. 1269( 4) nm,c = 1. 3728( 4) nm,α = 68. 349( 4) °,β = 89. 178( 4) °,γ = 88. 050( 4) °,V = 1. 0365( 6) nm3 and the complex 2 crystallized in an monoclinic system with space group P21/ c, a = 0. 67047( 12) nm,b = 0. 99503( 18) nm,c = 1. 5817( 3) nm,α = γ = 90°,β = 93. 739( 2) °,V = 1. 0530( 3) nm3. Complex 1 has a distorted pentagonal bipyramidal geometry,while complex 2 has a distorted octahedron geometry. In addition,by studying the bromination reaction activity,it shows that the peroxovanadium complexes can be considered as a potential functional model of bromoperoxidase.