No abstract

No abstract

No abstract

Novel series of Co(II), Ni(II) and Cu(II) transition metal complexes were synthesized from the Schiff base ligands HL 1-HL 4 derived from 2-amino-6nitrobenzothiazole with various aromatic aldehydes, i.e., 4-methylbenzaldehyde, 4ethylbenzaldehyde, 2-hydroxybenzaldehyde and 4-hydroxybenzaldehyde, respectively. The ligands HL 1-HL 4 and their metal (II) complexes were characterized by atomic absorption spectroscopy (AAS), magnetic susceptibility and molar conductance measurements, and UV-Vis, FT-IR and NMR spectroscopic techniques. The spectroscopic studies revealed that the complexes of HL 1-HL 3 coordinated in an octahedral environment and L 4 in square planar/tetrahedral geometry. The ligands HL 1-HL 4 and their metal(II) complexes were screened for their antimicrobial activities against Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and Candida albicans. The results suggest that the complexes of HL 4 possess greater inhibition activity towards C. albicans. The nonlinear optics (NLO) activities of ligands HL 1-HL 4 were determined. The obtained results showed that ligands HL 1 and HL 2 have greater second harmonic generation (SHG) efficiency than HL 3 and HL 4 .

No abstract