Preparation, Spectroscopic Characterization and Theoretical Studies of Transition Metal Complexes with 1-[(2-(1H-indol-3-yl)ethylimino)methyl]naphthalene-2-ol Ligand

Abstract

A new Schiff base [1-((2-(1H-indol-3-yl)ethylimino)methyl)naphthalene-2-ol] (HL) has been synthesized by condensing (2-hydroxy-1-naphthaldehyde) with (2-(1H-indol-3-yl)ethylamine). In turn, its transition metal complexes were prepared having the general formula; [Pt(IV)Cl2(L)2], [Re(V)Cl2(L)2]Cl and [Pd(L)2], 2K[M(II)Cl2(L)2] where M(II) = Co, Ni, Cu] are reported. Ligand as well as metal complexes are characterized by spectroscopic techniques such as FT-IR, UV-visible, 13C & 1H NMR, mass, elemental analysis. The results suggested that the ligand behaves like a bidentate ligand for all the synthesized complexes. On the other hand, theoretical studies of the ligand as well its metal complexes were conducted at gas phase using HyperChem 8.0. These metal complexes exhibited good antibacterial activity.

Preparation, spectroscopic study of Schiff base derived from dopamine and metal Ni(II), Pd(II), and Pt(IV) complexes, and activity determination as antioxidants

“…The bands at around 3,444, 3,185, 2,993, 2,833, 1,672, and 1,598 cm −1 are attributed to stretching vibration (OH) of the phenolic ring, C–H aromatic, C–H aliphatic, C–H aldehyde stretching vibration, CN of azomethine group, and CC aromatic, respectively. [ 16–23 ] The infrared spectra of Ni(L 2 ) 2 , Pd(L 2 ) 2 , and Pt(L 2 ) 2 Cl 2 complexes are shown in Figures 3–5 and Table 2. The band at around 3,450, 3,441, and 3,394 cm −1 is attributed to stretching vibration (OH) of the phenolic ring.…”

Spectroscopic characterization for new model from Schiff base and its complexes

“…They can act as ligands during coordination and meanwhile can behave as materials for numerous potential applications in the fields of catalysis, materials, and analytical titrations. [ 1 ] These compounds have electronic and structural abilities optoelectronic and electronic applications. Imines have been widely used in molecular electronic devices, [ 2 ] chemosensor fabrications, [ 3 ] and hole‐transporting materials.…”

Spectroscopic characterization for new complexes with 2,2′‐(5,5‐dimethylcyclohexane‐1,3‐diylidene)bis(azan‐1‐yl‐1‐ylidene)dibenzoic acid

“…Schiff bases having the general structure R-CH=N-Ar (R and Ar are aromatic and aliphatic groups, respectively) result from the condensation of primary amines with ketones or aldehydes. [1][2][3] They are characterized by -N CH-(imine) groups, which have biology performance such as antimicrobial, antitumor, anti-inflammation, and anticancer. [4] Tetradentate Schiff bases especially those with a N 2 O 2 donor set, resulting from the condensation of aliphatic diamines and aromatic such as dimedone with amine compounds derivatives, have an antibacterial effect on both gram negative and gram positive bacteria possibly due to the presence of azomethine groups (imines), which may interfere with bacterial growth.…”

“…H 1 -, and C 13 -nuclear magnetic resonance (NMR) spectra and thermo gravimetric analysis (TGA) curve, Bohr magnetic (B.M. ), elemental microanalyses, metal ions, chloride containing, and molar conductance.…”