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История Урала
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Труды Института высокотемпературной электрохимии УрО РАН
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Труды сотрудников Института горного дела УрО РАН
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Труды сотрудников ЦНБ УрО РАН
Публикации Черешнева В.А.
Публикации Чарушина В.Н.
Каталог библиотеки ИЭРиЖ УрО РАН
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1.

Вид документа : Статья из журнала
Шифр издания : 54/C 21
Автор(ы) : Mechaev A., Pestov A. V., Yatluk Yu. G., Pervova M. G., Panyukova A. A.
Заглавие : Carboxyethenylation of polychlorobiphenyls
Место публикации : Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2013. - Vol.49, №5. - С. 691-695
Примечания : Библиогр.: с. 695 (12 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): butyl acrylate --palladium catalysts --polychlorobiphenyls
Аннотация: For the first time 2-carboxyethenylation was performed with butyl acrylate in the presence of palladium catalysts of bromine derivatives of polychlorobiphenyls obtained by bromination of polychlorobiphenyls. The haloderivatives of the butyl phenylcinnamate are readily hydrolyzed and hydrodehalogenized affording a mixture of phenylhydrocinnamic acids
\\\\expert2\\NBO\\Russian Journal of Organic Chemistry\\2013, 49, (5), 691-695.pdf
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2.

Вид документа : Статья из журнала
Шифр издания : 54/K 96
Автор(ы) : Kuznetsov V. A., Pervova M. G., Yatluk Yu. G.
Заглавие : Synthesis of epsilon-caprolactone with stable hydrogen peroxide adducts
Место публикации : Russian Journal of Applied Chemistry. - 2013. - Vol.86, №2. - С. 176-181
Примечания : Библиогр.: с. 181 (16 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): cyclohexanone --e-caprolactone --hexafluoroisopropanol
Аннотация: Oxidation of cyclohexanone to ɛ-caprolactone with stable industrially manufactured hydrogen peroxide derivatives: adduct with urea (urea hydrogen peroxide), sodium perborate, sodium percarbonate (Persol), magnesium monoperphthalate (Dismozon) was studied. Oxidation with urea hydrogen peroxide is the most efficient in hexafluoroisopropanol in the case of preliminary removal of urea in the form of an oxalate. Oxidation with sodium perborate and percarbonate provides high yields in trifluoroacetic acid. The lowest cost process consists in interaction with sodium monoperphthalate (Persol and phthalic anhydride) in an aqueous medium
\\\\expert2\\NBO\\Russian Journal of Applied Chemistry\\2013, v. 86, N 2, p.176.pdf
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3.

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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4.

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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5.

Вид документа : Статья из журнала
Шифр издания : 54/N 89
Автор(ы) : Nesterov D. V., Molochnikov L. S., Pestov A. V., Matochkina E. G., Kodess M. I., Yatluk Yu. G.
Заглавие : Novel methods for synthesis and sorption properties of N,O-(2,3-dihydroxy)propylchitosan
Место публикации : Polymer science. Series B. - 2013. - Vol.55, №7-8. - 490-495
Примечания : Bibliogr. : p. 494-495 (36 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): glycidol --chitosan--gel medium
Аннотация: The direct addition of glycidol to chitosan in a gel medium under exposure to ultrasound afforded the chelating aminopolymer N,O-(2,3-dihydroxy)propylchitosan with a degree of substitution up to 2.3. The sorption characteristics of the crosslinked aminopolymers with respect to boron-containing ions were estimated
\\\\expert2\\NBO\\Polymer Science. Series B\\2013, V. 55, N 7-8, p. 490-495.pdf
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6.

Вид документа : Статья из журнала
Шифр издания : 54/E 27
Автор(ы) : Zakharova G. S., Andreikov E., Osipova V. A., Yatluk Yu. G., Puzyrev I. S.
Заглавие : Effect of the titanium glycerolate precursor heat treatment procedure on the morphology and photocatalytic properties of TiO2 nanopowder
Место публикации : Inorganic Materials. - 2013. - Vol.49, №11. - С. 1127-1132
Примечания : Bibliogr. : p. 1132 (20 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): nano powders--photocatalytic property--tio2
Аннотация: We have studied the effect of titanium glycerolate precursor heat treatment on the morphology, structure, and photocatalytic properties of titanium dioxide nanopowders
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7.

Вид документа : Статья из журнала
Шифр издания : 54/S 70
Автор(ы) : Osipova V. A., Zakharova G. S., Andreikov E., Yatluk Yu. G., Puzyrev I.
Заглавие : Sol-gel synthesis of titanum dioxide by hydrolysis of titanium glycerolates and peroxides
Место публикации : Glass Physics and Chemistry. - 2013. - Vol.39, №4. - С. 398-402
Примечания : Bibliogr. : p. 402 (11 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): photocatalysis--sol-gel-- titanium dioxide
Аннотация: The sol-gel synthesis of titanium dioxide from titanium glycerolate (TG) and titanyl sulfate was studied. The effect of hydrothermal treatment in an autoclave at 130 C and refluxing TG with the peroxo titanium acid gel on the product properties, i.e.; morphology of the nanoparticles and their aggregates, as well as their ability to adsorption and photocatalytic degradation of methylene blue in aqueous solutions was discussed
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8.

Вид документа : Статья из журнала
Шифр издания : 54/N 52
Автор(ы) : Kuznetsov V. A., Pestov A. V., Pervova M. G., Yatluk Yu. G.
Заглавие : New synthesis of Dialkyl carbonates from alkylene carbonates and titanium alkoxides
Место публикации : Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2013. - Vol.49, №7. - С. 1078-1079
Примечания : Bibliogr. : p. 1079 (9 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): titanium alkoxides --carbonates--alkylene carbonates
\\\\expert2\\NBO\\Russian Journal of Organic Chemistry\\2013, 49, (7), 1078-1079.pdf
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9.

Вид документа :
Шифр издания : 54/S 98
Автор(ы) : Pestov A. V., Slepukhin P. A., Yatluk Yu. G., Charushin V. N., Chupakhin O. N.
Заглавие : Synthesis of chelating polymer sorbents by using the S-N(H) methodology
Место публикации : Journal of Applied Polymer Science . - 2012. - Vol.125, №3. - С. 1970-1978
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): functionalization of polymers--phenol--x-ray analysis
Аннотация: The article describes a new synthetic approach to modify the structure of phenol-formaldehyde and resorcinol-formaldehyde resins, which enables one to functionalize a polymer matrix by using the S?NH (nucleophilic aromatic substitution of hydrogen) methodology. Direct heteroarylation of phenol (resorcinol) fragments in polymer chains with 1,2,4-triazine derivatives illustrates a new synthetic method in the polymer chemistry. The feature of this methodology is that it provides an opportunity to accomplish direct one-pot polymer transformations by incorporating of rather complicated chelating groups through the displacement of hydrogen in phenol moieties. It has been shown that in order to obtain chemically modified polymers on the basis of phenol-formaldehyde and resorcinol-formaldehyde resins with a high degree of substitution with chelating units, a polymer matrix has to react with 3-(pyridin-2'-yl)-1,2,4-triazin-5(2H)-one. Also, it has been found that polymer sorbents with a high selectivity can be obtained by using the template method. Targeted synthesis of model compounds, as structural units of the chelating polymers, and elucidation of the structure of their complexes with copper (II) ions have shown that the most plausible type of coordination is formation of the bridge 1 : 1 complexes of the a,a'-bipyridinyl type.
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10.

Вид документа :
Шифр издания : 54/C 89
Автор(ы) : Nikitin E. D., Popov A. P., Yatluk Yu. G., Simakina V. A.
Заглавие : Critical properties of some tetraalkoxysilanes and tetraalkoxytitaniums with branched alkyl radicals
Место публикации : Fluid Phase Equilibria. - 2012. - Vol.331. - С. 1-5
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): critical properties--tetraalkoxysilanes--tetraalkoxytitaniums
Аннотация: The critical pressures and the critical temperatures of tetraisopropoxytitanium, tetra-tert-butoxytitanium, and tetraisopropoxysilane have been measured. The decomposition of the substances studied begins at temperatures below their critical ones. A pulse-heating method which allows measuring the critical properties of thermally unstable compounds has been used. The times of heating from the beginning of a pulse to the moment of reaching the critical temperature were from 0.03 to 1 ms. The short residence times provided little degradation of the substances in the course of the experiments. The critical constants of tetraalkoxytitaniums and tetraalkoxysilanes with branched and straight alkyl chains have been compared. The experimental critical constants of tetraalkoxytitaniums and tetraalkoxysilanes have also been compared with those calculated using various group-contribution methods
\\\\Expert2\\nbo\\Fluid Phase Equilibria\\2012, v.331, p. 1-5.pdf
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11.

Вид документа :
Шифр издания : 54/S 89
Автор(ы) : Khamidullina L. A., Puzyrev I. S., Pestov A. V., Moshkin V. S., Yatluk Yu. G.
Заглавие : Structure and absorption spectra of substituted 2-hydroxy-2-trifluoromethylchroman-4-ones
Место публикации : Journal of Applied Spectroscopy. - 2012. - Vol.79, №4. - С. 509-514
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): absorption spectra--extinction coefficient--medium acidity
Аннотация: UV absorption spectra of substituted 2-hydroxy-2-trifluoromethylchroman-4-ones (chromanones) in aqueous ethyleneglycol were studied. Replacement of hydrogen in the aromatic ring of the chromanones by CH3 or CF3 groups was shown to cause the molar extinction coefficients of the K, B, and C=O bands to shift from 16,160 to 27,980 and 30,250 dm(3)/mol center dot cm; from 12,750 to 17,920 and 16,130 dm(3)/mol center dot cm; and from 3850 to 3630 and 2760 dm(3)/mol center dot cm, respectively. Increasing the solution pH from 1 to 10.5 affected weakly the aromatic ring bands yet impacted greatly the chromanone carbonyl bands, causing their lambda(max) to shift from 311-326 nm to 342-346 nm and their extinction coefficients to increase from 2760-3850 dm(3)/mol center dot cm to 9940-10,160 dm(3)/mol center dot cm. A further rise in the pH resulted in hypochromia of the carbonyl band due to the destruction of the chromanones. The results were confirmed by NMR spectroscopy and GC methods
\\\\Expert2\\nbo\\Journal of Applied Spectroscopy\\2012, v. 90, p.1176.pdf
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12.

Вид документа : Статья из журнала
Шифр издания : 54/N 10
Автор(ы) : Bratskaya S.YU., Azarova Yu. A., Matochkina E. G., Kodess M. I., Yatluk Yu. G., Pestov A. V.
Заглавие : N-(2-(2-pyridyl)ethyl)chitosan: Synthesis, characterization and sorption properties
Место публикации : Carbohydrate Polymers. - 2012. - Vol. 87, № 1. - С. 869-875
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): chitosan n-heterocyclic derivatives--selective adsorption--pyridine derivatives
Аннотация: The method of producing N-2-(2-pyridyl)ethylchitosan (PE-chitosan) with substitution degrees (DS) up to 1.2 has been developed using the "synthesis in gel" approach for direct addition reaction between 2-vynilpyridine and chitosan. Investigation of sorption properties has revealed significantly higher affinity of pyridylethyl fragments to Pt(IV)) and Pd(II) ions compared to the unsubstituted amino groups of chitosan. The maximum sorption capacities of PE-chitosan in 0.1 M HCl solution were estimated as 5.56 mmol/g for Au(III), 3.67 mmol/g for Pd(II), and 2.75 mmol/g for Pt(IV). Sorption capacities of PE-chitosan for transition metal ions at pH 4-8 were 1.5-2.6 higher than those of chitosan with the highest values attained for Cu(II) and Ag(I) ions - 1.50 mmol/g and 1.53 mmol/g, respectively. The PE-chitosan application for preconcentration of Au(III) with subsequent elution with HCl/thiourea mixtures was proved to be efficient for atomic absorption spectroscopy analysis of multi-component solutions with low gold content
\\\\Expert2\\nbo\\Carbohydrate Polymers\\2012, v. 87, p.869.pdf
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13.

Вид документа :
Шифр издания : 54/C 21
Автор(ы) : Skorik Yu.A., Pestov A. V., Kodess M. I., Yatluk Yu. G.
Заглавие : Carboxyalkylation of chitosan in the gel state
Место публикации : Carbohydrate Polymers. - 2012. - Vol. 90, № 2. - С. 1176-1181
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): chitosan--chemical modification--gel technique
Аннотация: This study presents a new approach for direct carboxyalkylation of chitosan in the gel state by using aza-Michael addition and substitution reactions. Various reagents were applied including acrylic and crotonic acids, and alpha-, beta-, gamma-, delta-, and epsilon-halocarboxylic acids. The reaction of chitosan with gamma- and delta-halocarboxylic acids showed no target product formation either in solution or in the gel state. In the case of acrylic, crotonic, alpha- and beta-halocarboxylic acids, the reaction performed in the gel state (concentration of chitosan 20-40%) shows higher degree of substitution at lower reaction time and temperature than in diluted solutions (concentration of chitosan 0.5-2%). The results were discussed in terms of kinetics of the target and side reactions. H-1 and C-13 NMR confirmed that in all cases the carboxyalkylation of chitosan proceeds exclusively at the amino groups
\\\\Expert2\\nbo\\Carbohydrate Polymers\\2012, v. 90, p.1176.pdf
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14.

Вид документа :
Шифр издания : 54/D 49
Автор(ы) : Puzyrev I. S., V'yukhina I. V., Ivanov M., Yatluk Yu. G.
Заглавие : Development of methods for preparation of Nd : YAG nanoparticles
Место публикации : Glass Physics and Chemistry. - 2012. - Vol.38, №4. - С. 427-430
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): synthesis--nanosized precursors --yttrium-aluminum
Аннотация: Methods for synthesis of nanosized precursors for the preparation of yttrium-aluminum garnet from organic-inorganic derivatives of yttrium and aluminum have been developed. It has been shown that most of the methods for carrying out the process result in the formation of precursors with high specific surface area. The precursor obtained using nanosized powder of aluminum oxide and yttrium acetylacetonate is the least agglomerated. The data obtained can be used when preparing optical ceramic from yttrium-aluminum garnet
\\\\Expert2\\nbo\\Glass Physics and Chemistry\\2012, V. 38, N 4, P.427-430.pdf
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15.

Вид документа : Статья из журнала
Шифр издания : 54/P 49
Автор(ы) : Pestov A. V., Slepukhin P. A., Yatluk Yu. G.
Заглавие : Comparative coordination ability of N-(2-hydroxyethyl)aminoacetic acid and O-(2-hydroxyethyl)hydroxyacetic acid in the copper(II) complexes
Место публикации : Russian Journal of Coordination Chemistry. - 2012. - Vol.38, №12. - С. 738-743
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): copper(ii)--n-(2-hydroxyethyl)aminoacetic --o-(2-hydroxyethyl)hydroxyacetic acids
Аннотация: Copper(II) complexes based on N-(2-hydroxyethyl)aminoacetic and O-(2-hydroxyethyl)hydroxyacetic acids were synthesized. Their structures were studied by X-ray diffraction analysis. The coordination spheres of the copper metal center were compared in the condensed phase for the both ligands
\\\\Expert2\\NBO\\Russian Journal of Coordination Chemistry\\2012, v. 38, N. 12, p.738.pdf
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16.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Pestov A. V., Slepukhin P. A., Permyakov A. E., Yatluk Yu. G.
Заглавие : Synthesis and structure of the disc-like cluster C72H 102N12Ni13O40
Место публикации : Journal of Structural Chemistry. - 2012. - Vol.53, №6. - С. 1017-1023
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): disc-like cluster ni13--synthesis--methyliminodipropionic acid
Аннотация: The disc-like cluster C72H102N12Ni 13O40 is first time synthesized based on N-(2-pyridyl)methyliminodipropionic acid. Single crystal X-ray diffraction is used to determine its atomic structure. The cluster consists of seven-nuclear core: nickel(II) hydrocomplex (Ni.Ni distance 3.012-3.032 Å) and six nickel chelates of the corresponding acid arranged around its perimeter (Ni.Ni distance 2.981-3.164 Å). In the chelate part of the complex, the ligand is pentadentate owing to the formation of a bridging bond, thus organizing a coordination geometry of the metal center as a distorted square bipyramid (4+2). Liquid chromatography-mass spectrometry is employed to study the structure of the obtained nickel(II) complexes
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17.

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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18.

Вид документа : Статья из журнала
Шифр издания : 54/S 89
Автор(ы) : Mekhaev A. V., Pestov A. V., Molochnikov L. S., Kovaleva E. G., Pervova M. G., Yatluk Yu. G., Grigor'ev I. A., Kirilyuk I. A.
Заглавие : Structure and characteristics of chitosan cobalt-containing hybrid systems, the catalysts of olefine oxidation [Electronic resource]
Место публикации : Russian Journal of Physical Chemistry A, Focus on Chemistry. - 2011. - Vol. 85, № 7. - С. 1155-1161
Систем. требования: http://www.springerlink.com/content/nxg4876m4n76w271/fulltext.pdf
Примечания : Bibliogr. : p. 1160-1161 (18 ref.). - 17.10.2011
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Cobalt-containing hybrid organo-inorganic materials based on the chitosan-SiO2, chitosan-Al2O3, and chitosan-cellulose systems were obtained. The surface structure and processes that occur during the formation of metal-containing materials, the catalytic properties of which were studied in the oxidation reactions of alkene, were investigated by EPR spectroscopy using a stable pH-sensitive nitroxyl radical, 4-dimethylamino-2-ethyl-5,5-dimethyl-2-(pyridin-4-yl)-2,5-dihydro-1H-imidazole-1-oxyl, as the adsorbed probe molecules
\\\\Expert2\\nbo\\Russian Journal of Physical Chemistry A, Focus on Chemistry\\2011, V.85, N 7, p.1155.pdf
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19.

Вид документа : Статья из журнала
Шифр издания : 54/N 10
Автор(ы) : Santos Sorena L. A., Ruiz M., Pestov A. V., Sastre A. M., Yatluk Yu. G., Guibal E.
Заглавие : N-(2-(2-Pyridyl)ethyl)chitosan (PEC) for Pd(II) and Pt(IV) sorption from HCl solutions
Место публикации : Cellulose. - 2011. - Vol. 18, № 2. - С. 309-325
Примечания : Bibliogr. : p. 324-325 (32 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Chitosan was modified by grafting 2-pyridyl-ethyl moieties on the biopolymer backbone for the synthesis of a Platinum Group Metal (PGM) sorbent. The sorbent was tested for Pd(II) and Pt(IV) sorption from HCl solutions. Stable for HCl concentrations below 0.5 M, the sorbent reached sorption capacities as high as 3.2 and 2.6 mmol metal g?1 for Pd(II) and Pt(IV), respectively. Metal sorption mainly proceeds by electrostatic attraction in acidic solutions, though a contribution of complexation mechanism cannot be totally rejected. The resistance to intraparticle diffusion is the main controlling mechanism for uptake kinetics. While agitation speed has a limited effect on kinetics, metal concentration and sorbent dosage have a greater effect on the kinetic profiles. The intraparticle diffusivity varies between 3 ? 10?11 and 4.5 ? 10?10 m2 min?1. Thiourea (combined with HCl solution) is used for Pd(II) and Pt(IV) desorption. The resin could be desorbed and recycled for a minimum of five cycles maintaining high efficiencies of sorption and desorption
\\\\Expert2\\nbo\\Cellulose\\2011, v.18, p. 309.pdf
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20.

Вид документа : Статья из журнала
Шифр издания : 54/N 10
Автор(ы) : Bratskaya S.YU., Azarova Yu. A., Matochkina E. G., Kodess M. I., Yatluk Yu. G., Pestov A. V.
Заглавие : N-(2-(2-pyridyl)ethyl)chitosan: synthesis, characterization and sorption properties
Место публикации : Carbohydrate Polymers. - 2011. - In Press, Accepted Manuscript, Availabe online 31 Augist 2011
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The method of producing N-2-(2-pyridyl)ethylchitosan (PE-chitosan) with substitution degrees (DS) up to 1.2 has been developed using the “synthesis in gel” approach for direct addition reaction between 2-vynilpyridine and chitosan. Investigation of sorption properties has revealed significantly higher affinity of pyridylethyl fragments to Pt(IV)) and Pd(II) ions compared to the unsubstituted amino groups of chitosan. The maximum sorption capacities of PE-chitosan in 0.1 M HCl solution were estimated as 5.56 mmol/g for Au(III), 3.67 mmol/g for Pd(II), and 2.75 mmol/g for Pt(IV). Sorption capacities of PE-chitosan for transition metal ions at pH 4-8 were 1.5-2.6 higher than those of chitosan with the highest values attained for Cu(II) and Ag(I) ions–1.50 mmol/g and 1.53 mmol/g, respectively. The PE-chitosan application for preconcentration of Au(III) with subsequent elution with HCl/thiourea mixtures was proved to be efficient for atomic absorption spectroscopy analysis of multi-component solutions with low gold content
\\\\Expert2\\nbo\\Carbohydrate Polymers\\2011, Article inPress, 31 August.pdf
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