Effect of polymer backbone chemical structure on metal ions binding by imidazolylmethyl derivatives

Пестов, А. В.; Privar, Yu. O.; Ustinov, A. Yu.; Voit, A. V.; Azarova, Yu. A.; Мехаев, А. В.; Bratskaya, Svetlana

doi:10.1016/j.cej.2015.07.066

Cited by 14 publications

(4 citation statements)

References 40 publications

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“…Amino-polysaccharide chitosan and polycarboxylic biopolymer alginate (containing guluronic and mannuronic acid groups) have been modified in research either by cross-linking to improve chemical stability [54] or through functionalization by grafting specific reactive groups [95][96][97]. Modifications of chitosan and alginate are realized by physical and chemical methods, and expand their applications [98].…”

Section: Metal Ion Removal By Alginate Chitosan and Related Adsorbent...mentioning

confidence: 99%

Some Well-Known Alginate and Chitosan Modifications Used in Adsorption: A Review

Benettayeb

Ghosh

Usman

et al. 2022

Water

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Owing to environmental pollution and increasingly strict regulations, heavy metals have attracted the attention of many researchers in various disciplines. Alginate and chitosan derivatives have gained popularity as biosorbents for water treatment. An increase in the number of publications on modified biosorbents for the biosorption of toxic compounds reveals widespread interest in examining the requirements and positive contribution of each modification type. This paper reviews the advantages and disadvantages of using alginate and chitosan for adsorption. Well-known modifications based on chitosan and alginate, namely, grafting, functionalization, copolymerization and cross-linking, as well as applications in the field of adsorption processes, especially amino acid functionalization, are reviewed. The selection criteria for the best biosorbents and their effectiveness and proposed mechanism of adsorption are discussed critically. In the conclusion, the question of why these adsorbents need modification before use is addressed.

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Section: Metal Ion Removal By Alginate Chitosan and Related Adsorbent...mentioning

confidence: 99%

Some Well-Known Alginate and Chitosan Modifications Used in Adsorption: A Review

Benettayeb

Ghosh

Usman

et al. 2022

Water

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“…Recently, we have shown that the sorption properties of imidazolylmethyl derivatives of a series of N-containing polymers with the same functionalization degree significantly depended on whether N-atoms of the polymer backbone were involved in metal ion binding or not. 12 The dependence of the selectivity and sorption capacity on the structure of the polymer backbone 14 and the type of cross-linking agent 11 has also been revealed for some pyridyl and bipyridyl derivatives. These derivatives of synthetic polymers [14][15][16] and functionalized natural polymers [17][18][19] are known as efficient chelating sorbents for precious and transition metals.…”

Section: Introductionmentioning

confidence: 99%

“…Chemical modification of synthetic and natural polymers via introduction of chelating fragments, e.g. N-containing heterocycles, [10][11][12] is one of the most efficient ways to tune the selectivity and efficiency of ion-binding. Aside from changes related to the properties of the introduced functional group, structural peculiarities of the precursor macromolecules can also significantly contribute to the sorption performance of the modified polymers.…”

Section: Introductionmentioning

confidence: 99%

Metal ion binding by pyridylethyl-containing polymers: experimental and theoretical study

et al. 2016

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Binding of Cu(2+), Ni(2+) and Ag(+) ions to polyallylamine (PAA), polyethylenimine (PEI), poly(N-2-(2-pyridyl)ethylallylamine) (PEPAA), poly(N-2-(2-pyridyl)ethylethylenimine) (PEPEI), and N-2-(2-pyridyl)ethylchitosan (PEC) has been investigated using batch sorption experiments, spectrophotometric titration, ESR, and XPS to elucidate how the structure of polymer precursors affects the ion binding efficiency of their pyridylethylated derivatives. It has been shown that pyridylethylation increases the sorption capacities of PAA and PEI cross-linked with epichlorohydrin toward Ag(+) and Ni(2+) ions, but does not improve or decrease that toward Cu(2+) ions. PEC was the most efficient material for Ag(+) ion sorption with the sorption capacity of 1.21 mmol g(-1). The highest sorption capacity for Ni(2+) (0.62 mmol g(-1)) was found for PEPEI. According to density functional theory (DFT) calculations, lower Cu(2+) binding efficiency to PEPEI results from the "looser" structure of this complex in comparison with unmodified PEI. DFT calculations have also suggested that the Cu(2+) ion is four-coordinated in the complexes with PEPAA and PAA and five-coordinated in all other complexes, which have the structures of distorted square pyramids with Cu-N bond lengths varying significantly depending on the ligand nature. The results of the theoretical investigations of the Cu(2+) complex structures were supported by the ESR data, which revealed the decrease of A‖ and the increase of g‖ values with increasing deviation from the square planar geometry of complexes in the ligands in the order PEI < PEPEI < PEPAA.

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“…Therefore, it is still necessary to understand how cations subtly interact with linear polymers. Even though numerous polymers with sophisticated functional groups for metal binding have been reported, − a clear demonstration showing the selective host–guest-like binding of a simple linear polymer to its guest counterpart is still unknown. , A simple model for this linear polymer chain can be polyacrylic acid (PAA) with multicarboxylic acid groups, while the formation of complexes between PAA and cations may be a consequence of host (polymer)–guest (cations) selectivity.…”

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confidence: 99%

Open Linear Polymer Host–Guest Interactions Sensed by Luminescent Silver Nanodots

et al. 2023

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The selectivity of the linear polymer chain toward its binding moieties has been considered negligible; thus, a clear demonstration showing the best-fit binding of a linear polymer to its guest counterpart is still unknown. Luminescent poly(acrylic acid) (PAA)-stabilized silver nanodots (PAA-AgNDs) have been applied as a turn-on sensor to monitor the interaction between the PAA chain and its binding cations. The binding of cations ions to the PAA chain may cross-link the linear PAA chain via coordination with carboxylate, which increases the rigidity of the polymer chain, retards the nonradiative decay of PAA-AgNDs, and consequently enhances the emission of silver nanodots while inducing a blue-shift of its emission spectrum. For the first time, we have demonstrated that a linear polymer chain can act as an open host to selectively bind to its best-matching cations. Specifically, among Group 2 cations (Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ ), calcium ions show the strongest bonding to the PAA polymer chain. Our research suggests that, with extra rigidity, the polymer improves its chemical stability as calcium ions cross-linked the linear polymer. Meanwhile, it has also been demonstrated that luminescent silver nanodots can be excellent probes for the detection of polymer activities with straightforward and simple visualization methods.

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Effect of polymer backbone chemical structure on metal ions binding by imidazolylmethyl derivatives

Cited by 14 publications

References 40 publications

Some Well-Known Alginate and Chitosan Modifications Used in Adsorption: A Review

Some Well-Known Alginate and Chitosan Modifications Used in Adsorption: A Review

Metal ion binding by pyridylethyl-containing polymers: experimental and theoretical study

Open Linear Polymer Host–Guest Interactions Sensed by Luminescent Silver Nanodots

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