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1.

Вид документа : Статья из журнала
Шифр издания : 54/P 41
Автор(ы) : Bratskaya S.YU., Privar Y. O., Korjakova O. V., Mechaev A., Pestov A. V.
Заглавие : Pentacyanoferrate(II) complexes with chitosan
Место публикации : Polymer Engineering and Science . - 2013. - С. Article in Press
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): sodium aminoprusside --polymer ligand (chitosan)--x-ray diffraction
Аннотация: New organic-inorganic materials based on products of interaction between sodium aminoprusside and polymer ligand (chitosan) have been synthesized. The composition of the obtained materials was characterized using the element analysis and X-ray diffraction; the Fourier transform infrared (FT-IR) spectroscopy and Thermogravimetric analysis data were used to propose the structure of the formed complexes. It was established that ion and ligand exchange were the main reactions at interaction of sodium aminoprusside with water-soluble chitosan salts. The comparative estimation of the sorption capacity with respect to cesium ions was performed for the synthesized complexes. It has been shown that the complex of chitosan with pentacyanoferrate(II) in the form of cobalt(II) salt has higher distribution coefficient with respect to Cs+ ions, as compared to cobalt aminoprusside. The maximum sorption capacity value for Cs+ was evaluated from the sorption isotherm and found to be equal to 0.3 mmol/g
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2.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Bratskaya S.YU., Azarova Yu. A., Portnyagin A. S., Mechaev A., Voit A., Pestov A. V.
Заглавие : Synthesis and properties of isomeric pyridyl-containing chitosan derivatives
Место публикации : International Journal of Biological Macromolecules . - 2013. - С. 426-432
Примечания : Bibliogr. : p. 431-432 (49 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): chitosan--physical-chemical properties--pyridyl derivative
Аннотация: Here we report on the method of synthesis in gel of a new heterocyclic aminopolymer-N-2-(4-pyridyl)ethylchitosan (4-PEC) via direct addition of 4-vinylpyridine to chitosan that yields a derivative with the substitution degree (DS) up to 0.8. The comparison of reactivity, thermal, spectroscopic, and sorption properties of a new derivative and its isomer N-2-(2-pyridyl)ethylchitosan (2-PEC) is presented. 2-PEC has higher sorption capacity and forms more stable chelates with [PdCl4]2- and [PtCl6]2- ions than 4-PEC, but the latter shows higher selectivity to noble metals ions in the presence of Cl- ions. A gradual increase of the sorption capacities and the affinity coefficient for Cu2+ and Ni2+ in the row chitosan4-PEC2-PEC was related to the increase of electron donor nitrogen atoms content and chelating properties of 2-PEC. A nearly negligible increase of the 4-PEC sorption capacity for Ag+, as compared to plain chitosan, was suggested to be dependent on the difference in complexation models for 2-PEC and 4-PEC derivatives. The density functional theory (DFT) calculations have shown that the "pendant" model of the complex with Ag(I) is energetically favorable only for 2-PEC derivative, while in cases of chitosan and 4-PEC only "bridge" complexes can be formed that results in lower sorption capacity
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3.

Вид документа : Статья из журнала
Шифр издания : 54/P 91
Автор(ы) : Pestov A. V., Ezhikova M. A., Kodess M. I., Azarova Yu. A., Bratskaya S.YU.
Заглавие : Preparation of a sorbent for metal ions based on N-(5-methylimidazol-4- ylmethyl) chitosan with medium degree of substitution [Электронный ресурс]
Место публикации : Russian Journal of Applied Chemistry. - 2014. - Vol.87, №1. - С. 82-87
Систем. требования: http://download.springer.com/static/pdf/18/art%253A10.1134%252FS1070427214010121.pdf?auth66=1408075753_546b523b58da74e027aa1ca950641a6c&ext=.pdf
Примечания : Bibliogr. : p. 87 (27 ref.). - 13.08.2014
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): heterocycle-containing chelating --chitosans--amino polymer
Аннотация: A procedure was developed for preparing a heterocycle-containing chelating amino polymer, N-(5-methylimidazol-4-ylmethyl) chitosan, by polymer-analogous transformations of chitosan in reaction with 4-chloromethyl-5-methylimidazole. The procedure allows synthesis of the polymer with the degree of substitution of up to 0.8, with simultaneous formation of the cross-linked structure. The structure of the polymers prepared was proved by IR and 13C NMR spectroscopy. The ability of N-(5-methylimidazol-4-ylmethyl) chitosan with the degree of substitution of 0.54 to sorb Cu2+ and Ni2+ ions was evaluated. According to the sorption isotherms, the sorption capacity of this derivative exceeds that of the unmodifi ed polymer by a factor of 5.
\\\\expert2\\nbo\\Russian Journal of Applied Chemistry\\2014, v. 87, N 1, p.82-87.pdf
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4.

Вид документа : Статья из журнала
Шифр издания : 54/P 41
Автор(ы) : Bratskaya S.YU., Zheleznov V. V., Privar Y. O., Mechaev A., Pestov A. V.
Заглавие : Pentacyanoferrate(II) complexes with N-containing derivatives of chitosan and polyallylamine: Synthesis and cesium uptake properties [Электронный ресурс]
Место публикации : Colloids and Surfaces A: Physicochemical and Engineering Aspects. - 2014. - Vol. 460. - С. 145-150
Систем. требования: http://www.sciencedirect.com/science/article/pii/S0927775714003914?np=y#
Примечания : 2.07.2015
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): sodium aminoprusside --polymer ligands (chitosan)--polyallylamine
Аннотация: Here we report on synthesis of new organic–inorganic materials based on products of interaction between sodium aminoprusside and polymer ligands (chitosan (CS), N-2-(2-pyridyl)ethylchitosan (2-PC), N-2-(4-pyridyl)ethylchitosan (4-PC), N-(4-methyl-5-imidazolyl)methylchitosan (IC), N-(2-cyanoethyl)chitosan (CC), polyallylamine (PA), N-(2-pyridyl)methyl-polyallylamine (PMPA), N-2-(2-pyridyl)ethyl-polyallylamine (PEPA), N-(4-methyl-5-imidazolyl)methyl-polyallylamine (IPA) and poly(2-vinylpyridine) (PVP)). The composition of the obtained materials was characterized using the element analysis and X-ray diffraction; the Fourier transform infrared (FT-IR) spectroscopy and thermogravimetric analysis data were used to propose the structure of the formed complexes. It was established that ion and ligand exchange were the main reactions, through which sodium aminoprusside interacts with water-soluble polymer salts. Reactivity in complex formation reaction of unmodified polymers changes in a row: PA CS PVP. Modification of chitosan with 2-(4-pyridyl)ethyl and 2-cyanoethyl moieties enhances reactivity of chitosan to the level of PA, while introduction of 2-(2-pyridyl) and (4-methyl-5-imidazolyl)methyl moieties, on the contrary, decreases reactivity of chitosan to that of PVP. At the same time, functionalization of PA with 2-pyridylalkyl groups decreases its reactivity in reaction with aminoprusside ion. Thus, reactivity of all studied polymeric matrices changes in the row: PA ≈ 4-PC ≈ CC CS 2-PC ≈ IPA ≈ IC PMPA PVP PEPA. The distribution coefficients with respect to cesium ions have been determined for the synthesized complexes in cobalt(II) form. It has been shown that the complex of chitosan with pentacyanoferrate(II) has higher distribution coefficient with respect to Cs+ ions, as compared to its N-derivatives and synthetic polymers. Organic–inorganic materials obtained in the matrix of synthetic polymers have shown higher tendency to peptization and, therefore, lower sorption capacities and distribution coefficients
\\\\expert2\\nbo\\Colloids and Surfaces A\\2014, v.460, p.145-150.pdf
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5.

Вид документа : Статья из журнала
Шифр издания : 54/S 61
Автор(ы) : Petrova Yu. S., Neudachina L.K., Mechaev A., Pestov A. V.
Заглавие : Simple synthesis and chelation capacity of N-(2-sulfoethyl)chitosan, a taurine derivative [Электронный ресурс]
Место публикации : Carbohydrate Polymers. - 2014. - Vol.112. - С. 462-468
Систем. требования: http://libgen.org/scimag/get.php?doi=10.1016%2Fj.carbpol.2014.06.028
Примечания : Bibliogr. : p. 467-468 (60 ref.). - 13.08.2014
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): chitosan--selectivity--sorption
Аннотация: This study presents a simple and effective synthesis method of N-(2-sulfoethyl)chitosan (NSE-chitosan) via a reaction between sodium 2-bromoethanesulfonate and chitosan that allows polymer transformation without using additional reagents and organic solvents. The chemical structure of the obtained NSE-chitosan was characterized by FT-IR and 1H NMR spectroscopies. Thermogravimetric study of NSE-chitosan coupled with FT-IR analysis has shown stability of the polymer up to 200 °C, which almost does not change with the increase of degree of substitution (DS). The sorption of transition and alkaline earth metal ions from multicomponent solutions on NSE-chitosan was investigated. The synthesized sorbents showed the selective recovery of silver(I) and copper(II) ions from ammonium acetate buffer solution. The increase of DS enhanced the selectivity to silver(I) ions sorption in comparison with copper(II) ions. Selectivity coefficients KAg/Cu increase from 1.3 to 10.9 with DS increasing up to 0.7 (ammonium acetate buffer solution, pH 6.5). Sorption isotherms of transition metal ions on NSE-chitosan with DS = 0.5 have been fitted using Langmuir, Freundlich, and Redlich-Peterson models. The maximum sorption capacities of sorbent in ammonium acetate buffer solution at pH 6.0 were 1.72 mmol/g for Cu(II), 1.23 mmol/g for Ag(I) and below 0.5 mmol/g for Co(II), Zn(II), Cd(II), Pb(II), Mn(II) and Ni(II) ions
\\\\expert2\\nbo\\Carbohydrate Polymers\\2014, v. 112, p. 462.pdf
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6.

Вид документа : Статья из журнала
Шифр издания : 54/P 91
Автор(ы) : Lakiza N. V., Tissen O. I., Neudachina L.K., Ezhikova M. A., Kodess M. I., Pestov A. V.
Заглавие : Preparation of a chelating sorbent based on pyridylethylated polyethylenimine for recovering transition metal ions [Электронный ресурс]
Место публикации : Russian Journal of Applied Chemistry. - 2013. - Vol.86, №9. - С. 1383-1387
Систем. требования: http://download.springer.com/static/pdf/559/art%253A10.1134%252FS1070427213090114.pdf?auth66=1396066219_589313ada1bb85090500d111d75e1537&ext=.pdf
Примечания : Bibliogr. : p. 1386-1387 (29 ref.). - 27.03.2014
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): amino polymer--pyridylethylpolyethylenimine
Аннотация: A method was developed for preparing a chelating amino polymer, pyridylethylpolyethylenimine with maximal degree of substitution, by polymer-analogous transformations of branched polyethylenimine in reaction with 2-vinylpyridine. The ability of cross-linked pyridylethylpolyethylenimine with the degree of substitution of 0.32 to sorb Cu2+, Ni2+, Co2+, Zn2+, Cd2+, Mn2+, and Pb 2+ ions present simultaneously in solution was evaluated. In an ammonium acetate sorption system (pH 3.5-4.0), the sorbent selectively interacts with Cu(II) ions
\\\\expert2\\nbo\\Russian Journal of Applied Chemistry\\2013, v. 86, N 9, p.1383.pdf
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7.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Nesterov D. V., Molochnikov L. S., Kodess M. I., Matochkina E. G., Koryakova O. V., Yatluk Yu. G., Pestov A. V.
Заглавие : Synthesis of poly[N-(2,3-dihydroxypropyl)aminostyrene], a new sorbent for boron(III) ions
Место публикации : Russian Journal of Applied Chemistry. - 2013. - Vol.86, №5. - С. 777-781
Примечания : Библиогр.: с. 781 (33 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): aminostyrene--nitration--glycidol
Аннотация: A procedure was developed for preparation of poly[N-(2,3-dihydroxypropyl)aminostyrene] via successive stages of nitration, reduction, and glycidol treatment of polystyrene, which gives the polymer with a maximal degree of functionalization. The composition and structure of the intermediates and end products of the polymer-analogous reactions were characterized by elemental analysis, IR spectroscopy, and solid-state 13C NMR spectroscopy. The sorption characteristics of poly[N-(2,3-dihydroxypropyl)aminostyrene] toward boroncontaining ions were assessed
\\\\expert2\\NBO\\Russian Journal of Applied Chemistry\\2013, v. 86, N 5, p.777.pdf
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8.

Вид документа :
Шифр издания : 54/T 44
Автор(ы) : Neudachina L.K., Golub A. Y., Gorbunova E. M., Yatluk Yu. G.
Заглавие : Thermal stability of new sorption materials based on polysiloxanes
Место публикации : Glass Physics and Chemistry. - 2011. - Vol.37, №6. - С. 603-612
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): thermal stability --thiocarbamoylated polysiloxanes --siloxane matrix
Аннотация: The thermal stability of the unmodified, aminated, and thiocarbamoylated polysiloxanes has been studied. The siloxane matrix is stable in the temperature range up to 800°C. For the first time, mass spectrometry has been applied to the analysis of the composition of the gaseous products of thermal decomposition of the studied polysiloxanes. It has been shown that, in the process of thermal decomposition, the terminal functional groups are detached and oxidized. Water, ammonia, nitrogen, carbon, and sulfur (in the case of thiourea-modified sorbent) oxides are formed predominantly. The quantitative removal of functional groups during heating up to 800°C has been confirmed by IR spectroscopy. A mechanism of thermal decomposition of polysiloxane xerogels has been proposed. It has been found that adsorption of platinum increases the thermal stability of the samples
\\\\Expert2\\nbo\\Glass Physics and Chemistry\\2011, V. 37, N 6, P.603-612.pdf
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9.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Pestov A. V., Petrova Yu. S., Bukharova A. V., Neudachina L.K., Koryakova O. V., Matochkina E. G., Kodess M. I., Yatluk Yu. G.
Заглавие : Synthesis in a gel and sorption properties of N-2-sulfoethyl chitosan
Место публикации : Russian Journal of Applied Chemistry. - 2013. - Vol.86, №2. - С. 269-272
Примечания : Библиогр.: с. 272 (24 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): chelates --amino-containing polymer --n-2-sulfoethyl chitosan
Аннотация: A new procedure was developed for preparation of chelate amino-containing polymer N-2-sulfoethyl chitosan by synthesis in a gel through the reaction between chitosan and sodium 2-bromoethanesulfonate, yielding a polymer with the degree of substitution of up to 0.5. The structure of the resulting polymers was confirmed by 1H NMR spectroscopy. The sorption characteristics with respect to transition and alkaline-earth metal ions were determined for the cross-linked polymers
\\\\expert2\\NBO\\Russian Journal of Applied Chemistry\\2013, v. 86, N 2, p.269.pdf
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10.

Вид документа : Статья из журнала
Шифр издания : 54/I-55
Автор(ы) : Pestov A. V., Bratskaya S.YU., Azarova Yu. A., Yatluk Yu. G.
Заглавие : Imidazole-containing chitosan derivative: a new synthetic approach and sorption properties
Место публикации : Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2012. - Vol.61, №10. - С. 1959-1964
Примечания : Bibliogr. : p. 1963-1964 (33 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): chitosan--sorbent--gold(iii)
Аннотация: A novel method for the synthesis of a hetaryl containing chelate amino polymer, namely, N (4(5) imidazolylmethyl)chitosan (IMC), with a degree of substitution up to 0.3 was pro posed. The "synthesis in gel" approach involves direct substitution of the hydroxyl group in 4(5) imidazolylmethanol. The structures of these polymers were confirmed by 1H NMR data. For sorption studies, IMC samples were crosslinked with epichlorohydrin and diglycidyl ethers of ethylene glycol and diethylene glycol. The degrees of swelling and sorption properties of the polymers largely depend on the crosslinking agent and the degree of crosslinking. The sorption capacities of IMC for AuIII, PtIV, and PdII ions are higher than those of the nonmodified polymer. The extraction of noble metal ions from chloride solutions becomes more selective with increasing degree of crosslinking. The sorption capacity of IMC for CoII and NiII ions is higher than those of chitosan and its known N heterocyclic derivatives
\\\\expert2\\NBO\\Russian Chemical Bulletin\\2012, 61 (10), 1959-1964.pdf
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