Synthesis of copper nanosquare and nanorectangular using novel precursor (substituted benzoic acid complexes)

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The ligand 3,4,5-trimethoxybenzoic acid was used to prepare a series of its complexes with divalent manganese, cobalt, nickel and copper ions in a molar ratio of 2 ligand: 1 metal to give the complexes of formula [M(TMA) 2 ].xH 2 O, M = Mn, Co; x = 0 or M = Ni, Cu; x = 2. The prepared complexes were characterized using FTIR, UV–Vis, CHN, molar conductivity, thermal analysis and magnetic susceptibility. The measurements proved that the TMA anion has the ability to bind with the studied metals by the behaviour of the bidentate chelate through the oxygen atoms of the carboxylic group. The complex [Cu(TMA) 2 ] was used as a starting material to prepare copper nanoparticles using ascorbic acid in the presence of tween as a dispersant, which was characterized by X-ray diffraction and TEM technique. The TEM measurement proves that the copper was prepared with nanoscale with rectangular (53*70 nm) and square (30–32*30–32 nm) nanoparticles and the X-ray diffraction measurement proved that the formed copper was of high purity.