Synthetic and spectroscopic studies of chelate polymers involving azelaoyl bis‐N‐phenyl hydroxamic acid with transition metal ions

Abstract

Chelate polymers of azelaoyl bis-N-phenyl hydroxamic acid with Mn(II), Co(II), Ni(II), and Zn(II) were synthesized for the first time in a dimethylformamide (DMF) medium. These newly synthesized chelate polymers were characterized on the basis of several analytical techniques, namely, elemental analyses, infrared and reflectance spectral studies, magnetic moment, and thermal analyses. On the basis of data obtained with these techniques, the composition of the polymeric units, the structure, and the geometry were ascertained. It was found that the Mn(II) and Zn(II) chelate polymers had a tetrahedral geometry, whereas the Co(II) and Ni(II) chelate polymers were octahedral. Thermal analytical data clearly indicated that the Ni(II) chelate polymer was highly thermally stable relative to the Mn(II), Co(II), and Zn(II) chelate polymers. Since these chelate polymers are highly insoluble in almost all the organic solvents, including alcohol, acetone, chloroform, carbon tetrachloride, DMF, and DMSO, and have high thermal stability, they may be used as surface-coating materials and as thermally stable materials.

Biomimetic design of chelating interfaces

“…To the best of our knowledge, there are no commercially available monomers containing HA groups that are suitable for photoinitiated graft polymerization. The commonly used approach to prepare synthetic PHA polymers is by the hydroxylamidation reaction of active moieties including acrylic ester, acrylamide, acrylonitrile, and acid chloride . Hence, we herein chose methyl acrylate, which contains an acrylic ester group, as the monomer to covalently graft a high density of acrylic ester active groups from the PP substrate surface in the first step.…”

“…Metal chelating polymers have gained considerable attention in recent years due to their importance in biomedical, environmental, and biotechnology applications. Much research has been conducted on new approaches to synthesize metal chelating polymers that remove heavy metals in wastewater purification systems . In analytical chemistry, chelating polymers bearing different functional groups have been developed for the chromatographic separation or exchanging of metal ions and metal‐containing substances .…”

“…The high specificity and affinity of the functional groups (e.g., HA) in siderophores for metal chelation has inspired researchers to design biomimetic metal chelating polymers [Figure (B)]. The majority of published research in this area has focused on synthesis of free macromolecules, hydrogels, and resins with biomimetic metal chelating functionality . However, the ability to impart siderophore‐mimetic chelating functionality to the surface of solid supports would enable significant improvements in recovery and reuse of chelating materials, and expand their societal and commercial impact (e.g., separation process for wastewater treatment, active packaging applications, etc.).…”

“…Much research has been conducted on new approaches to synthesize metal chelating polymers that remove heavy metals in wastewater purification systems. [1][2][3][4][5][6][7][8][9] In analytical chemistry, chelating polymers bearing different functional groups have been developed for the chromatographic separation or exchanging of metal ions and metalcontaining substances. [10][11][12][13][14][15] The biomedical significance of metal chelators has also been extensively exploited for applications in drug delivery, 16 iron chelation therapy, 17,18 selective inhibition of metal-containing enzymes, 18 etc.…”

Synthesis, Thermal and Electrical Properties of 2, 2’-HBBF Copolymer Resin

“…They reported thermal studies of the resins have been carried out to determine their mode of decomposition, activation energy, order of reaction, frequency factor, entropy change, free energy and apparent entropy change. Ukey and coworkers [4][5][6] synthesized and studied thermal properties of some chelate polymers. The decomposition temperature and the order of reaction have been determined by TGA analysis.…”