Abstract

Kolhe Nitin H, Jadhav Shridhar S, Shaikh Sajid H, Takate Sushma J and Aware Dinkar J.

DOI : http://dx.doi.org/10.13005/ojc/320620

In present investigation nanocrystalline mixed ligand complexes were synthesized using 8-hydroxyquinoline, salicylaldoxime with metals like Cu (II), Ni (II) and Co (II). The metal: ligand ratio was found to be 1:1:1. These complexes were characterized using electronic spectra, FTIR spectra, elemental analysis, magnetic susceptibility, thermogravimetric analysis, conductivity measurement, powder X-ray diffraction and Scanning Electron Microscopy with electron dispersive spectroscopic methods.  The electronic spectra of complexes suggest that they have square planer geometries. In FTIR analysis characteristic bands of ν (M-N) and  ν (M-O).The Co (II) and Cu (II) complexes are paramagnetic in nature and these had square planer geometry. While Ni (II) complexes are diamagnetic nature and having square planer geometry. The thermal analysis of complexes was studied in an attempt to assign intermediate compounds. Low molar conductance values indicate non – electrolytic nature of the complexes. The Powder X-ray diffraction study shows formation of nanocrystalline phase as well as the grain size of complexes is less than 10 nm. The EDS study is shows  good agreement for formation of mixed ligand metal complexes  . Complex: [C₁₆H₁₂CuN₂O₂], [C₁₄H₁₂N₂NiO₄ ], [C₁₆H₁₂NiN₂O₂] and [C₁₆H₁₂CoN₂O₂]   had antimicrobial activity against four bacteria tested. Bacteria were resistant to other five complexes.

Nanocrystalline complexes; N; O donor; SEM-EDS; Disc Diffusion

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