Abstract
Poly-vinyl-alcohol (PVA) has been cross-linked chemically with nicotinic-acid (NA) in an aqueous medium. The copolymers were complexed with NiII and CuII ions. The complexes and copolymers were analyzed using FT-IR and UV–Visible spectroscopy, XRD and TGA, but copolymers were extra analyzed with nuclear magnetic resonance (1H NMR). FT-IR spectra of copolymer revealed the presence of C=O & C–N groups due to the esterification of PVA-NA. The Cu/NA-PVA formed via bidentate interaction of the pyridinyl and carboxyl of NA. EPR/UV-vis data shows the square-planar geometry for NiII and CuII complexes. The adsorption of IC dye onto CuII/NA-PVA complex was noticeably greater (90%) in 35 min than NiII/NA-PVA. The DFT\B3LYP with 6- 311G* quantum chemical calculations were carried out for tested compounds. The DFT was conducted to examine an interaction mode of the target compounds with the reaction system. The QSPR was calculated as: optimization geometries, (FMOs), chemical-reactivities and NLO for the copolymers. The (MEPs) were figured to predict the interaction behavior of the ligand and its complexes.
Highlights
Artificial dyes are most commonly used in fabric and skin treatment manufacturing [1]
We report synthesis and characterization of PVA copolymers using Nicotinic acid as monomer
PVA (0.3 g, 6.80 mmol of OH) and NA (0.6 g, 4.76 mmol of COOH) were presented in a 50 mL glass container fixed with an automatic stirrer, a nitrogen inlet, a condensation side-arm joined to a condenser and other arm for receiving flask
Summary
Artificial dyes are most commonly used in fabric and skin treatment manufacturing [1]. There are other highly toxic compounds in the discharge of colored wastewater that increase environmental problems [2,3]. These wastes, released from fabric and skin treatment manufacturing, having 1 mg/L of dye, are sufficient to impart color to H2O, making it unpotable for everyday use [4,5]. Cu NPs based catalysts or Cu complexes immobilized on polymers can be obtained by different processes such as metallic or ionic Cu. In 2008, Orto et al reported the fabrication and application of Cu(II)- polyampholyte as an effective catalyst for methyl orange (MO) degradation as a pollutant at room temperature viaH2O2 activation [3]. Physico-chemical features for the investigated Cps and its complexes were analyzed using different spectral data (FT-IR, UV/Vis, NMR, ESR, TGA and X-ray- analysis)
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