SYNTHESIS AND CHARACTERIZATION OF NOVAL SCHIFF BASE COMPLEXES OF MN(II), CO(II), NI(II), CU(II), ZN(II), PD(II), PT(II) METAL IONS FOR MICROBIAL ACTIVITIES AND THEIR NANOPARTICLES

New Schiff base metal ion complexes are synthesized and characterized by Mass, TGA, DTA, FTIR, UV-Visible, Conductivity, Magnetic properties, SEM, TEM EDX, and Elemental Analysis. The complexes have the general formula [ML₂.H₂O], where L=3-{(Z)-[(2-aminophenyl) methylidene] amino}-4-chlorobenzoic acid, and M= Mn (II), Co (II), Ni (II), Cu(II), Zn (II), Pt(II), and Pd(II). The Schiff base’s imino, amine, and carboxylic groups form a bond, the bands observed in the FTIR of the complexes. UV-Visible spectra of the complexes show that they are colour except for Zn (II) complexes. The parameters like the Nephelauxetic effect, covalence parameter b^1/2, and co-valence (δ%) are calculated. The complexes are covalent. The central metal ions have eight coordination numbers, and the ligand behaves as bidentate.  According to SEM TEM, EDX, and elemental analysis of the complexes, the size of prepared nanoparticles is 16-84 nm. The mass spectra of the ligand and complexes match the theoretically estimated values of Schiff bases and complexes. According to TGA and DTA complexes decompose when temperature rises, and two coordinated water molecules are present in the coordination sphere. The gram-positive and gram-negative bacteria have been used to screen Ligand and their complexes show an inhibitory effect.