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The novel was assembled by the ultrasonic sonication method of three new ligand-metal nano complexes with Ni(II), Cu(II), and Co(II) of theophylline derivative. This method was used to produce smaller, small distributed nanoparticles and without any aggregations. Molar conductance, FT-IR,1HNMR, UV–Vis., solubility, flame atomic absorption, and (C.H.N) elemental analysis were used to describe and to suggest the structure of the new ligand and nanocomplexes. Engagement of all spectroscopic data indicates that the new ligand (L) acts as a bidentate ligand with its metal ions. The molar conductance reveals that the nanocomplexes were non-electrolytes. The size and morphology of nano complexes measured by TEM were in range (12-18) nm. The biological activities of the synthesised metal nano complexes were assayed against four types of bacterial strains, Staphylococcus aureus, Bacillus subtilis (gram-positive bacteria) and Klebsiella pneumonia, Escherichia Coli (gram-negative bacteria). The results show remarkable leverage compared to the parent ligand in the present nano complexes.

Nano-synthesis, spectroscopic characterisation and antibacterial activity of some metal complexes derived from Theophylline