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Synthesis, Characterization and Properties of Transition Metals with Acetone Salicyloylhydrazone

Author: LiangZuo
Tutor: LiuXiangRong
School: Xi'an University of Science and Technology
Course: Applied Chemistry
Keywords: Hydrazone Complexes Synthesis Crystal structure Thermal decomposition Catalytic activity Biological activity
CLC: O641.4
Type: Master's thesis
Year: 2010
Downloads: 81
Quote: 1
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The use of benzaldehyde - carboxylic acid salicyloyl acyl hydrazone (C15H12O4N2) and the transition metals Cu, Zn, Ni, of Cr, Co. and Pb of nitrate reaction synthesis acetone salicyl acyl hydrazone transition metal complexes was been wherein the Cu, Zn and Ni complex was four kinds of single crystal: of Cu (C10H11O2N2) 2 [Zn (C10H12O2N2) 2 (H2O) 2] (NO3) 2, [Ni (C10H12O2N2) 2 (H2O) 2] (NO3) 2 and [Ni (C10H12O2N2) (C5H5N) 2] (NO3) 2. By elemental analysis, infrared spectroscopy, ultraviolet spectroscopy, molar conductivity and X-ray single crystal diffraction were used to characterize the nature and structure of the complexes and their single crystal. Complexes chemical formula respectively for Cu (L) 2 and M (HL) 2 (R) 2 (NO3) n (M = Zn (Ⅱ), NI (II), Cr (III), Co. (Ⅱ), Pb ( II), L = C10H12O2N2, R = H2O or C5H5N, n = 2 or 3). As can be seen from the structure of the complex crystal, the first wife body Homophthalic benzaldehyde salicylhydrazone change occurred after the formation of complexes and ultimately generate the acetone salicylhydrazone is transition metal complexes. In the complexes, the two ligands involved in the form of a bidentate ligand, the N atom of the imino carbonyl O atom and the transition metal complex is formed after two relatively stable five-membered ring. TGA tested four kinds of single crystal of Cu, Zn and Ni complexes 5.00 ℃ · min-1, 10.00 ℃ · min-1 and 15.00 ° C · min-1 under three different heating rates of thermal decomposition process, Kissinger and Ozawa method to calculate the apparent activation energy and the kinetic parameters of the second phase of their thermal decomposition. Experimental results show that the complexes obtained by the two calculation methods, activation energy Ea, the linear correlation coefficient r are relatively close, the complexes have a higher thermal decomposition temperature. Wherein [Ni (C10H12O2N2) 2 (C5H5N) 2] (NO3) 2 complexes of thermal decomposition of the highest temperature, the best thermal stability. Using potassium permanganate calibration method for the determination of the ability of the four kinds of single crystal of the Cu, Zn and Ni complexes of the catalytic decomposition of hydrogen peroxide, the results found that the catalytic activity of the complexes of hydrogen peroxide are stronger than the ligand and metal salt, wherein Cu ( C10H11O2N2) 2 complex is the most active of the catalytic decomposition of hydrogen peroxide. Four kinds of single crystal of Cu, Zn and Ni complexes the DNA activity test results show that there is a certain interaction of such complexes with DNA by UV spectrophotometry. Select the ligand and Cu (C10H11O2N2) 2 complexes of E. coli (ATCC 8099), the minimum inhibitory concentration experimental results show that the ligand and Cu (C10H11O2N2) 2 complexes have good antibacterial effect.

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