Chelating and biological properties of an azo polymer resin: synthesis, characterization and its application

Abstract

The polymeric ligand (resin) was prepared from 1-(4-hydroxyphenylazo)-2-naphthol (4HPA2N-F) with formaldehyde in the presence of oxalic acid as a catalyst. Poly (4HPA2N-F) was characterized by Fourier transform infrared and 1 H-NMR spectroscopic techniques. The molecular weight of the polymer was determined by gel permeation chromatography. Polychelates were obtained when the dimethylformamide solution of the polymer containing a few drops of ammonium hydroxide was treated with a aqueous solution of Cu(II)/Ni(II). The Infrared spectra of polychelates suggest that the metals were coordinated through the oxygen of the phenolic-OH group and nitrogen of the azo group. The thermogravimetic analysis, differential scanning calorimetry and X-ray diffraction studies indicate that the incorporation of the metal ion significantly enhanced the degree of crystallinity. The sorption properties of the chelate-forming polymer towards various metal ion Cu(II) and Ni(II) were studied as a function of pH, nature and concentration of electrolytes. The antibacterial activities of polymer and its metal complexes against several microorganisms were also investigated by using agar well diffusion method.

Novel bioactive copper and nickel polymeric complexes: Synthesis, characterization, antimicrobial activity, and DFT calculations

“…Also, the strong interaction between Cu(II) and with N and O donor atoms increased the lipophilic nature and hence increased the activity of compounds towards such microbes. Finally, we concluded that the results obtained in this work showed promised antimicrobial efficiency for the synthesized copper complexes in comparison with others reported in literature 65,66 …”

“…Finally, we concluded that the results obtained in this work showed promised antimicrobial efficiency for the synthesized copper complexes in comparison with others reported in literature. 65,66 T A B L E 4 Some calculated energetic properties of PL1, PL2, and their complexes by the DFT method.…”

Synthesis of porous iron – zirconium mixed oxide fabricated ethylene diamine composite for removal of cationic dye

“…A wide variety of adsorbents like metal oxides [16], activated carbon [17,18], biomass [19,20], polymer, nanosilicates, nanoferrites, resins etc. were extensively used [21][22][23][24][25][26][27]. Polymer-based adsorbents are used worldwide for remediation of wastewater due to their high stability, porosity and large adsorption capacities [6].…”

Low-cost nanoparticles sorbent from modified rice husk and a copolymer for efficient removal of Pb(II) and crystal violet from water

“…Therefore, it is essential to develop environmental friendly and also low cost process for detecting heavy metals and also dyes in industrial effluents. Heavy metal ions and dyes can be removed from aqueous solutions via modified polymeric materials through reactive functional groups on their surfaces (Roper and Lightfoot, 1995;Chen et al, 2004;Vieira and Beppu, 2005;Chen et al, 2007;Vieira et al, 2007;Niu et al, 2010;Sasidaran et al, 2011;Salehi et al, 2012;. Hence, based on both the environmental and the economical points of view the use of lowcost agricultural by-products has also become a main research focus (Kumar et al, 1987;Babel and Kurniawan, 2003;Wan Ngah and Hanafiah, 2008).…”