Novel substituted azomethine – Metal complexes: Spectral, structural and optical properties

Abstract

An azobenzene based 5-bromo 4-methoxy salicylideneaniline ligand (L) has been synthesized with ZnCl2 and FeCl3 to form a Zn(5-bromo 4-methoxy salicylidene aniline – ZnL) and Fe(5-bromo 4-methoxy salicylidene aniline - FeL) [ML]. Functional group of L and ML were identified from Fourier transform infrared (FT-IR) spectrum. From this spectrum we observed the intra molecular hydrogen bonding from NH and OH of our compound. Nuclear magnetic resonance (NMR) spectrum shows the placement of the hydrogen atom of our compound. In this NMR spectrum also we observed the intra molecular hydrogen bonding of ML compound. The optical studies were studied by UV-Vis absorption spectrum. The synthesized compound were purified by repeated recrystallization and crystallized using different solvents (like methanol, ethanol, acetone, ethyl acetate and chloroform) to grow as a good quality single crystal. Ethyl acetate was found as a suitable solvent to grow three dimensional good quality single crystals. The metal substituted Schiff base complexes present a wide range of remarkable properties including structural, magnetic, and second-order nonlinear optical properties. Iron (III) complexes supported by tetradentate unsymmetrically-substituted ML ligands have also attracted wide attention for the potential application as iron-containing enzymes.An azobenzene based 5-bromo 4-methoxy salicylideneaniline ligand (L) has been synthesized with ZnCl2 and FeCl3 to form a Zn(5-bromo 4-methoxy salicylidene aniline – ZnL) and Fe(5-bromo 4-methoxy salicylidene aniline - FeL) [ML]. Functional group of L and ML were identified from Fourier transform infrared (FT-IR) spectrum. From this spectrum we observed the intra molecular hydrogen bonding from NH and OH of our compound. Nuclear magnetic resonance (NMR) spectrum shows the placement of the hydrogen atom of our compound. In this NMR spectrum also we observed the intra molecular hydrogen bonding of ML compound. The optical studies were studied by UV-Vis absorption spectrum. The synthesized compound were purified by repeated recrystallization and crystallized using different solvents (like methanol, ethanol, acetone, ethyl acetate and chloroform) to grow as a good quality single crystal. Ethyl acetate was found as a suitable solvent to grow three dimensional good quality single crystals. The metal substituted ...