Synthesis, structures and properties of the catalytic bromination reaction of a series of novel scorperate oxidovanadium complexes with the potential detection of hydrogen peroxide in water

摘要

A series of scorpionate oxovanadium (IV) complexes: [VO(Tp~(4I))(pz)(SCN)]·1/2CH_2Cl_2 (1), [VO(Tp)(pzTp)] ·2H _2O (2), [VO(Bp)(Tp~(4I))] (3) and [VO(C_5H_7O_2)(Tp4I)]·CH_3OH (4) (Bp: [H_2B(pz)~2], Tp: [HB(pz)_3], Tp~(4I): [HB(4I-pz)~3], pzTp: [B(pz)4]) have been synthesized and characterized by elemental analysis, IR spectra, UV-Vis spectroscopy, powder X-ray diffraction, single-crystal X-ray diffraction and thermal gravimetric analysis (TG). Structural analysis shows that the coordination environment of vanadium atom is N_5O, to form a distorted octahedron geometry. In addition, the catalytic activities of the bromination reactions for complexes 1 and 2 in phosphate buffer with phenol red as a trap were evaluated primary by UV/Vis spectroscopy, and a practical application of H_2O_2 detection was firstly observed in the catalytic reaction system.