Study of the structure of a polyacrylic acid-polyethyleneimine-copper (II) ternary polymer-metal complex

Kabanov, N.M.; Кокорин, А. И.; Rogacheva, V. B.; Zezin, A. B.

doi:10.1016/0032-3950(79)90338-1

Cited by 23 publications

(24 citation statements)

References 5 publications

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“…We suggest that Cu 2+ forms two types of interactions at neutral pH including binding to ionized carboxylic groups and to amine or hydrazide groups provided by the cross-linkers. A similar mechanism was suggested for PEI/PAA multilayers impregnated with copper ions [56,58]. Release of Cu 2+ from the hydrogels at low pH can be explained by full protonation of carboxylic groups causing diminished interactions between Cu 2+ and PMAA.…”

Section: Formation Of [(Pmaa) N -Cu 2+ ] Complexes In (Pmaa) N Hydrogelssupporting

confidence: 59%

“…Several groups investigated the interaction of Cu 2+ with poly(carboxylic acids) films, brushes, and electrostatically-bound multilayers [ 56 -61 ]. Sukhishvili et al found that Cu 2+ binding to poly(acrylic acid)/branched polyethyleneimine (PAA/BPEI) multilayer films was due to two driving forces: ionic pairing due to carboxylic groups and chelating ability of the -NHgroups of BPEI [56]. A similar Cu 2+ -binding mechanism was reported later by Zacharia et al for the (BPEI-Cu(II)/PAA) system [58].…”

Section: Introductionsupporting

confidence: 53%

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Nanostructured highly-swollen hydrogels: Complexation with amino acids through copper (II) ions

Zavgorodnya

Kozlovskaya

Kharlampieva

2015

Polymer

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We report on the complexation of highly swollen poly(methacrylic acid) (PMAA) nanothin hydrogel films with copper (II) ions and the stability of these (PMAA)-Cu 2+ complexes in amino acid solutions. These networks are produced by selective cross-linking of PMAA with adipic acid dihydrazide (AAD) and ethylenediamine (EDA) in hydrogen-bonded spin-assisted layer-bylayer films. The swelling of the hydrogels at higher pH values is significantly suppressed after introducing copper (II) ions and can be restored by treatment with amino acid solutions including serine, threonine, arginine, histidine and glutamine. The hydrogel swelling recovery is controlled by Cu 2+ removal from the hydrogel which is regulated by the strength of [(PMAA) n-Cu 2+ ] complex bonding and is dependent on the amino acid type, concentration and the hydrogel"s cross-linker. The use of AAD as a cross-linker allows for selective binding and recognition of arginine among other amino acids. The special affinity of the [(PMAA) 16-AAD-Cu 2+ ] hydrogel complex to arginine is due to the formation of ternary (hydrogel-copper-arginine) complexes stabilized by electrostatic interactions between the carboxylic groups of PMAA and the guanidinium side group of arginine. Our study provides new aspects of competing interactions between polyelectrolyte networks, metal ions, and amino-acids and opens prospects for developing novel analyte-responsive biosensors.

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Section: Formation Of [(Pmaa) N -Cu 2+ ] Complexes In (Pmaa) N Hydrogelssupporting

confidence: 59%

Section: Introductionsupporting

confidence: 53%

Nanostructured highly-swollen hydrogels: Complexation with amino acids through copper (II) ions

Zavgorodnya

Kozlovskaya

Kharlampieva

2015

Polymer

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“…Assumingly, the binding of small Cu 2+ ions to PHum and NIPECs is not only due to electrostatic but also due to coordination and van der Waals interactions in which minor hydroxyl and amino groups of PHum could be involved. In addition, it was reported (Kabanov, Kokorin, Rogacheva, & Zezin, ) that at high concentrations of copper ions, each of them could form an electrostatic bond with one carboxylic group of an anionic polymer. Such arrangement of the final NIPECs could also contribute to their abundant capacity toward Cu 2+ ions found in the experiment.…”

Section: Resultsmentioning

confidence: 99%

Humics‐based interpolyelectrolyte complexes for antierosion protection of soil: Model investigation

et al. 2018

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The aim of this article is to demonstrate a novel polymer‐based technique for stabilization of soil against wind and water erosion. Conventional approaches deal with individual water‐soluble polymers, which, being deposited on the soil, are removed from the soil surface after rewatering. Here, we describe an elegant way for soil stabilization via deposition of interpolyelectrolyte complexes formed by two oppositely charged water‐soluble polymers. Electrostatic complexation in an aqueous solution of a cationic poly(diallyldimethylammonium chloride) with an excess of water‐soluble anionic biopolymers, humic acids, results in formation of a negative non‐stoichiometric interpolyelectrolyte complex (NIPEC). Upon deposition of a NIPEC aqueous solution over soil and drying out, a protective layer (crust) forms on the surface, composed of NIPEC and soil particles, resistant to wind and water erosion. After destruction, the crust is completely restored by rewatering. The high stability of the NIPEC‐soil crust is due to a NIPEC block structure with hydrophilic free anionic units and hydrophobic mutually neutralized anionic/cationic units, which ensures optimum adsorption on the surface of soil particles and binds them to bigger aggregates. The NIPEC treatment retains the porous structure of soil that favors seed germination and plant development. Being effective absorbent of heavy metals, the NIPEC formulation ensures a normal seed germination in the presence of toxic Cu2+ ions. Thus, the humics‐based NIPECs ensures antierosion protection and detoxification of soil. Additionally to ecological and agricultural applications, the NIPEC formulations have potential for immobilization of moving sands, conservation of mining dumps, treatment of road slopes, and so forth.

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“…3,4 The latter are known to have stoichiometric composition (by charge). Curve 3 in Figure 1 shows that PSA-Cu(II) complexes have much lower values of F than the PAMPS-Ca complex.…”

Section: Composition and Swelling Behavior Of The Complexesmentioning

confidence: 99%

Interaction of Sodium Poly(2-acrylamide-2-methyl-1-propanesulfonate) Linear Polymer and Gel with Metal Salts

2003

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Effect of concentration of salts and of the charge of metal ion on swelling behavior, composition and structure of the gels of poly(2-acrylamide-2-methyl-1-propanesulfonic acid) (PAMPS) salts in aqueous medium was studied. In the solutions of sodium and calcium chlorides the gel is swollen whereas in the presence of cobalthexammine(III) or iron(III) chlorides it collapses. In the collapsed gels the ratio Q between the number of charges of the network and that of trivalent metal ions in the gel phase is close to stoichiometric. At high concentrations of multivalent salts the marked increase of Q is observed and the gels swell. The collapse and the reentrant swelling of the gel in the solutions of iron salt occur in the same ranges of concentrations where precipitation and redissolution of linear polymer is observed. The collapse of PAMPS gel in the presence of trivalent metal ions is explained by the formation of salt bridges between polymer ions and the cations of metal via the electrostatic forces. At high excess of metal ions into the gel these bridges are destroyed due to competition interactions with the ions of inorganic salt.

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Study of the structure of a polyacrylic acid-polyethyleneimine-copper (II) ternary polymer-metal complex

Cited by 23 publications

References 5 publications

Nanostructured highly-swollen hydrogels: Complexation with amino acids through copper (II) ions

Nanostructured highly-swollen hydrogels: Complexation with amino acids through copper (II) ions

Humics‐based interpolyelectrolyte complexes for antierosion protection of soil: Model investigation

Interaction of Sodium Poly(2-acrylamide-2-methyl-1-propanesulfonate) Linear Polymer and Gel with Metal Salts

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