Cu(II), Zn(II) and Mn(II) complexes of poly(methyl vinyl ether-alt-maleic anhydride). Synthesis, characterization and thermodynamic parameters

Abstract

The complexes of poly(methyl vinyl ether-alt-maleic anhydride) (poly(MVE-alt-MA)) with Zn(II), Mn(II) and Cu(II) ions were synthesized from the reaction of the aqueous solution of copolymer and metal(II) chlorides at different temperatures ranging from 25 • to 40 • C. Elemental analysis of the metal-polymer complexes suggests that the metal to ligand ratio is 1:1. The formation constants of each complex were determined by the mol-ratio method. UV-Vis studies showed that the complex formation tendency increased in the following order: Zn(II) > Cu(II) > Mn(II). This order was confirmed by the Irving-William series and Pearson's classification. The IR spectral data indicated the metal ions to be coordinated through the hydroxyl groups of the hydrolysed maleic anhydride. The intrinsic viscosity and thermal properties of the copolymer and metal-polymer complexes and their thermal stability are discussed.

Thermosensitive Bioadhesive Hydrogels Based on Poly(N-isopropylacrilamide) and Poly(methyl vinyl ether-alt-maleic anhydride) for the Controlled Release of Metronidazole in the Vaginal Environment

“…The spectrum of the hydrolyzed form of copolymer shows a band from 3500 to 3030 cm −1 related to stretching vibration of hydroxyl groups (OH) of carboxyl moieties (hydrolyzed MA unit). This broad band partially overlaps with absorption bands between 2980 and 2840 cm −1 , which are assigned to symmetrical and asymmetrical C–H stretching vibrations of CH (hydrolyzed MA unit), CH 2 , and CH 3 (MVE unit) groups [ 24 ]. The sharp band at 1728 cm −1 is attributed to stretching vibration of the carbonyl group (C=O) (hydrolyzed MA unit).…”

“…The sharp band at 1728 cm −1 is attributed to stretching vibration of the carbonyl group (C=O) (hydrolyzed MA unit). The signal at 1173 cm −1 is assigned to stretching vibration of the ether group (C–O–C) (MVE unit) [ 24 ].…”

Preparation of porous resin with Schiff base chelating groups for removal of heavy metal ions from aqueous solutions

“…The FT-IR absorbance spectrum of poly(MVE-alt-MA-1) is presented in Figure 2. The spectrum shows the absorption bands at 3379 cm -1 (ν O-H and ν COO-H, broad band), 2940 cm -1 (ν C-H), 1782 cm -1 (ν C=O of MA unit), 1730 cm -1 (ν C=O of carboxylic group), 1664 cm -1 (ν C=O of Schiff base), 1645 cm -1 (δ N-H), 1534 cm -1 (ν C=N), 1280 cm -1 (ν OC-OH of carboxylic group), 1104 cm -1 (ν C-O-C of MA unit)[33,34].…”

Nickel oxide nanotube synthesis using multiwalled carbon nanotubes as sacrificial templates for supercapacitor application

“…Its chelating properties are related to carboxylic groups of PSSA monomers (figure 5(c)). It is known that PSSA forms complexes with metal ions in solutions [28,36,37]. The chelating mechanism involves two carboxylic groups of each monomer [28].…”