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Abstract

SYNTHESIS, CHARACTERIZATION AND ANTIMICROBIAL ACTIVITY OF Ni(II) TERNARY METAL COMPLEXES WITH SCHIFF BASE SAICYLALDEHYDE-AMINO ACIDS AND 1,10- PHENANTHROLINE AS LIGANDS

Deeksha Sharma* and Prof. Arpan Bhardwaj

ABSTRACT

In the present paper, the synthesis of Ni(II) mixed ligand complexes of the type [Ni(salaa)phen]NO3 are determined where salaa= Salicylidene amino acids schiff base series of L-Glycine, L-Phenylalanine and LTyrosine and phen = 1,10- phenanthroline. The environmentally efficient and modern developed method is used for synthesis of mixed ligand complexes. The ligands and their complexes are characterized by elemental analysis, FT-IR spectroscopy and UV-VIS spectroscopy. The Antimicrobial studies were also performed for the mixed ligand complexes. The investigations of the spectral data for the ligands and complexes suggested the octahedral geometry of the coordination of Ni(II) metal with the ligands. Electronic spectrum of Ni(II) complex displayed the d-d transition bands in the region 730–836, 525–615, and 340–450 nm, presumably due to the three spin-allowed transitions. 3A2g→ 3T2g, 3A2g → 3T1g and 3A2g → 3T1g transitions. The azomethine linkage (-CH=N-) between salicyladehyde amino acids based Schiff bases is described by the IR spectral peak around 1600 cm-1. This band was shifted towards lower frequencies in the spectra of its metal complexes (1595-1510 cm-1) compared with the above Schiff base indicating the involvement of the azomethine nitrogen in coordination with metal ion. The antimicrobial study shows good inhibition zone against bacteria and fungi in the range of 12-28 mm diameter.

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