O-97 Oxidation of -cysteine in oxygen-saturated aqueous solution in the presence of Cu(II)-containing adjusted polymers [Text] / S. Y. Men'shikov, A. V. Vurasko, L. S. Molochnikov, E. G. Kovaleva, A. A. Efendiev // Journal of Molecular Catalysis A: Chemical. - 2000. - Т. 158, № 1. - P447-451 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The influence of synthesis conditions of adjusted sorbents based on polyethylenepolyamine on catalytic properties of their Cu(II)-containing samples has been studied. It was shown that adjustment of sorbents leads to a significant increase in activity of Cu(II)-containing catalysts on their base. |
Saloutin, V. I. Fluorine-containing 2(3)-oxo esters, 2,4-dioxo esters, and their analogs as precursors for construction of fluoroheterocycles [Text] / V. I. Saloutin, Ya. V. Burgart, O. N. Chupakhin // Scientific advances in chemistry: heterocycles, catalysis and polymers as driving forces: plenary lectures 7th ISTC seminar, Russia, 2005. - 2005. - P107-117 : рис. - Библиогр.: с. 116-117 (20 ref.) Кл.слова (ненормированные): BLOCK-SYNTHONES -- OXO ETHERS -- HETEROCYCLIC SYSTEMS -- FLUORINE-CONTAINING |
F 70 Saloutin, V. I. Fluorine-containing 2(3)-oxo esters, 2,4-dioxo esters and their analogs as precursors for construction of fluoroheterocycles [Text] / V. I. Saloutin, Ya. V. Burgart, O. N. Chupakhin // Scientific Advances in Chemistry: Heterocycles, Catalysis and Polymers as Driving Forges: 7th International ISTC SAC Seminar, Ekaterinburg. - 2004. - P107-117 : ил. - Библиогр.: с. 116-117 (20 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): FLUORINE-CONTAINING 2(3)-OXO ESTERS -- 2,4-DIOXO ESTERS -- FLUOROHETEROCYCLES |
А 32 Адсорбция и адгезия полимеров к поверхности наночастиц ysz в жидкой среде и композитной пленке = Adsorption and adhesion of polymers at the interface of YSZ nanoparticles in liquid phase and composite FILM [] / А. П. Сафронов, Т. В. Терзиян, Е. Г. Калинина, И. С. Пузырев, Ю. Г. Ятлук // Российские нанотехнологии. - 2007. - № 9-10. - С. 81-89. - Библиогр.: с. 89 (15 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Методами рефрактометрии и изотермической калориметрии исследован процесc адсорбции полимерных модификаторов: полиакриловой кислоты (ПАК), сополимера бутилакрилата и 5 % метакриловой кислоты (БМК-5), поливинилбутираля (ПВБ) и поливинилацетата (ПВА), на поверхности сферических наночастиц ZrO2, стабилизированного Y2O3 (YSZ), со средним геометрическим размером 11 нм из дисперсий в спиртах, а также адгезия данных полимеров к поверхности наночастиц в композитной пленке. Получены изотермы сорбции полимеров из раствора, которые имеют сложный ступенчатый характер, что свидетельствует о конформационных переходах макромолекул в ходе адсорбции. Изотермы были описаны линейной комбинацией уравнений Ленгмюра и Ленгмюра-Фрейндлиха. Для ПАК наблюдается аномальный характер изотермы, когда с увеличением содержания полимера в суспензии адсорбция сначала увеличивается, а затем уменьшается. Показано, что полная сорбционная емкость поверхности наночастиц YSZ увеличивается в ряду ПАК БМК-5 ? ПВА ПВБ. С использованием термохимического цикла, включающего процессы растворения полимера и пленочного композита YSZ с полимерным связующим, а также смачивания нанопорошка YSZ, получены значения энтальпии образования композитов и изотермы адгезии полимеров к поверхности наночастиц. Определены значения энтальпии адгезии полимера к наночастицам в насыщенном слое, толщины этого слоя и константы адсорбционного равновесия. Адгезионное взаимодействие в композициях увеличивается в ряду ПВБ БМК-5 ПВА ? ПАК, что противоположно ряду полимеров, упорядоченных по степени увеличения сорбционной емкости поверхности наночастиц в суспензиях |
C 77 Coordinational polymers on basis of chitosan and fluoricontaining lithium 1,3-diketonates [] : доклад, тезисы доклада / V. I. Filyakova, A. V. Pestov, N. S. Boltacheva, Yu. G. Yatluk, V. N. Charushin // XXIV Международная Чугаевская конф. по координационной химии и Молодежная конф.-шк. "Физико-химические методы в химии координационных соединений", СПб, 15-19 июня 2009 г. : тез. докл. - СПб., 2009. - С. 606-607 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
P 80 Polymers Based on Epoxy Resins and Functional Derivatives of Polychlorobiphenyls [Electronic resource] / N. Yu. Ostanina, L. D. Dultseva, A. L. Suvorov, O. N. Chupakhin // Russian Journal of Applied Chemistry. - 2002. - Vol. 75, № 5. - P814-817 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: A new way to utilize polychlorobiphenyls was suggested: transformation of Sovol base hydrolysis products into glycidyl ethers and titanates. The resulting products were tested as components of epoxy compounds which are subsequently cured to obtain three-dimensional polymer networks \\\\Expert2\\nbo\\Russian Journal of Applied Chemistry\\2002, v. 75, N. 5, p.814.pdf |
S 98 Synthesis and properties of epoxy-anhydride polymers modified with polyfluorolakyl-substituted oxiranes in the course of curing [Electronic resource] / M. S. Fedoseev, L. F. Derzhavinskaya, V. I. Karmanov, D. N. Bazhin, A. Ya. Zapevalov, T. I. Gorbunova, V. I. Saloutin // Russian Journal of Applied Chemistry. - 2010. - Vol. 83, № 4. - P723-727 : табл., граф. - Bibliogr. : p. 723-727 (24 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): POLYMERS -- EPOXY-ANHYDRIDE POLYMERS -- OXIRANES -- POLYFLUOROLAKYL-SUBSTITUTED OXIRANES -- CURING Аннотация: Epoxy-anhydride polymers based on N,N,O-triglycidyl-p-aminophenol and isomethyltetrahydrophthalic anhydride were synthesized in the presence of new active modifiers, polyfluoroalkyl glycidyl ethers. The kinetics of the reactions of the modifiers with the anhydride were studied by differential scanning calorimetry and IR spectroscopy. The physicomechanical characteristics, glass transition points, and water absorption of the polymers were determined. \\\\Expert2\\nbo\\Russian Journal of Applied Chemistry\\2010, v. 83, N 4, p.723-727.pdf |
E 27 Effect of heterocyclic derivatives of ferrocene on free-radical polymerization of methyl methacrylate and styrene [Text] / R. M. Islamova, O. I. Golovochesova, Yu. B. Monakov, I. A. Utepova, A. A. Musikhina, O. N. Chupakhin // Polymer science. Series B. - 2010. - Vol. 52, № 11-12. - P637-647 : il. - Bibliogr. : p. 647 (13 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): HETEROCYCLIC DERIVATIVES -- FERROCENE -- FREE-RADICAL POLYMERIZATION -- METHYL METHACRYLATE -- STYRENE Аннотация: The free-radical bulk homopolymerization of methyl methacrylate and styrene initiated by benzoyl peroxide or AIBN in the presence of heterocyclic derivatives of ferrocene is studied. It is shown that, in the case of the peroxide initiator, ferrocene derivatives form highly efficient initiation systems, which make it possible to polymerize methyl methacrylate at a high rate, to reduce the molecular mass of polymers, and to synthesize polymers with a high content of syndiotactic triads, while in the case of AIBN, such systems are not formed. \\\\Cserver\\Dist\\НБО\\Электронная библиотека_Библиогр1\\Polymer science. Series B\\2010, V. 52, N 11-12, p. 637-647.pdf |
S 45 Selective mоnо-N-2-carboxyethylation of chitosan in the presence of magnesium halides [Text] / A. V. Pestov, M. I. Kodess, E. G. Matochkina, Yu. G. Yatluk // Carbohydrate Polymers. - 2011. - Vol. 86, № 2. - P783-788. - Bibliogr. : p. 787-788 (19 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The solubility of chitosan in aqueous solutions of lithium and magnesium halides varies in the order: LiCl LiBr LiI; MgCl2 MgBr2 MgI2. A method for selective production of mono-N-(2-carboxyethyl)chitosan (NCE-chitosan) was developed by synthesis in gel (concentration of chitosan 4-20%) of the magnesium halides solution (1.1-3.5 M) using acrylic acid. Using for reaction of MgI2 or MgBr2 provides relative greater amount of the monosubstituted amino groups (73-87%) in comparison with their absence (50-70%) at the high degree of substitution (DS) more than 0.7. DS of the prepared NCE-chitosan and the ratios mono-: disubstitution of amino groups was determined by 1H NMR spectroscopy. The chemical structure of the obtained NCE-chitosan was characterized by FT-IR and 13C NMR spectroscopies \\\\Expert2\\nbo\\Carbohydrate Polymers\\2011, v. 86, p.783.pdf |
N 10 N-(2-(2-pyridyl)ethyl)chitosan: synthesis, characterization and sorption properties [Text] / S. YU. Bratskaya, Yu. A. Azarova, E. G. Matochkina, M. I. Kodess, Yu. G. Yatluk, A. V. Pestov // Carbohydrate Polymers. - 2011. - In Press, Accepted Manuscript, Availabe online 31 Augist 2011 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 |
T 45 Thiocarbamoyl chitosan: Synthesis, characterization and sorption of Au(III), Pt(IV), and Pd(II) [Text] / S. YU. Bratskaya, A. Yu. Ustinov, Yu. A. Azarova, A. V. Pestov // Carbohydrate Polymers. - 2011. - Vol. 85, № 4. - P854-861 : ил. - Bibliogr. : p. 860-861 (39 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Here we suggest a new method of chitosan sulfur derivatives (thiocarbamoylchitosans, TC-chitosans) synthesis via reaction in eutectic two-component system ammonium rodanide–thiourea that allows significant increase of substitution degrees at the reduced time and reagent consumption as compared to conventional synthetic procedures. The sorption properties of TC-chitosans with substitution degrees (DS) from 0.4 to 0.9 toward Au(III), Pt(IV), Pd(II) ions were studied in chloride solutions, including systems with 10 to 1000-fold excess of Fe(III), Cu(II), and Zn(II) over the precious metal ions content. The sorption capacities of TC-chitosans increase with DS and change in the row: Au(III) Pd(II) Pt(IV) ? Cu(II) Fe(III) Zn(II). The maximum sorption capacities of TC-chitosan with DS 0.9 for Pt(IV), Pd(II), and Au(III) were 1.24 mmol/g, 3.43 mmol/g, and 3.81 mmol/g, respectively. Characterization of precious metals oxidation states by the XPS method after the sorption on TC-chitosan revealed that the platinum and gold recovery occurred with reduction of Au(III) to Au(I)/Au(0) and Pt(IV) to Pt(II)???? \\\\Expert2\\nbo\\Carbohydrate Polymers\\2011, v. 85, p.854.pdf |
D 44 Deprotonation of pyrazole and its analogs by aqueous copper acetate in the presence of triethylamine / M. A. Yakovleva , E. V. Kushan, N. S. Boltacheva, V. I. Filyakova, S. E. Nefedov // Russian Journal of Inorganic Chemistry (Zhurnal Neorganicheskoi Khimii). - 2012. - Vol. 57, № 2. - С. 181-192 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): SECONDARY BUILDING UNITS -- MAGNETIC-PROPERTIES -- COORDINATION POLYMERS Аннотация: Deprotonation reactions of pyrazole and its analogs by aqueous copper acetate in benzene at room temperature in the presence of triethylamine were studied. Unlike 3,5-dimethylpyrazole, more acidic pyrazole, 5-methyl-3-trifluoromethylpyrazole, and 3,5-bis(trifluoromethyl)pyrazoles are deprotonated to give pyrazolate bridges. The structural features of the obtained compounds are discussed based on X-ray diffraction data \\\\Expert2\\nbo\\Russian Journal of Inorganic Chemistry\\2012, v. 57, N. 2, p.181-192.pdf |
N 10 N-(2-(2-pyridyl)ethyl)chitosan: Synthesis, characterization and sorption properties / S. YU. Bratskaya, Yu. A. Azarova, E. G. Matochkina, M. I. Kodess, Yu. G. Yatluk, A. V. Pestov // Carbohydrate Polymers. - 2012. - Vol. 87, № 1. - С. 869-875 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): 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 |
C 21 Carboxyalkylation of chitosan in the gel state / Yu. A. Skorik, A. V. Pestov, M. I. Kodess, Yu. G. Yatluk // Carbohydrate Polymers. - 2012. - Vol. 90, № 2. - С. 1176-1181 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): 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 |
S 98 Synthesis of chelating polymer sorbents by using the S-N(H) methodology / A. V. Pestov, P. A. Slepukhin, Yu. G. Yatluk, V. N. Charushin, O. N. Chupakhin // Journal of Applied Polymer Science . - 2012. - Vol.125, №3. - С. 1970-1978 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): 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. |
S 98 Synthesis in a gel and sorption properties of N-2-sulfoethyl chitosan / A. V. Pestov, Yu. S. Petrova, A. V. Bukharova, L. K. Neudachina, O. V. Koryakova, E. G. Matochkina, M. I. Kodess, Yu. G. Yatluk // Russian Journal of Applied Chemistry. - 2013. - Vol.86, №2. - С. 269-272. - Библиогр.: с. 272 (24 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): 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 |
I-55 Imidazole-containing chitosan derivative: a new synthetic approach and sorption properties [Electronic resource] / A. V. Pestov, S. YU. Bratskaya, Yu. A. Azarova, Yu. G. Yatluk // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2012. - Vol.61, №10. - С. 1959-1964. - Bibliogr. : p. 1963-1964 (33 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): 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 |
P 91 Preparation of a sorbent for metal ions based on N-(5-methylimidazol-4- ylmethyl) chitosan with medium degree of substitution [Electronic resource] / A. V. Pestov, M. A. Ezhikova, M. I. Kodess, Yu. A. Azarova, S. YU. Bratskaya // Russian Journal of Applied Chemistry. - 2014. - Vol.87, №1. - С. 82-87. - Bibliogr. : p. 87 (27 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): 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 |
S 61 Simple synthesis and chelation capacity of N-(2-sulfoethyl)chitosan, a taurine derivative [Electronic resource] / Yu. S. Petrova, L. K. Neudachina, A. Mechaev, A. V. Pestov // Carbohydrate Polymers. - 2014. - Vol.112. - С. 462-468. - Bibliogr. : p. 467-468 (60 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): 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 |
K 96 Kuznetsov, V. A. Development of complex approach to the synthesis of trimethylene carbonate as a monomer for biodegradable polymers [Electronic resource] / V. A. Kuznetsov, M. G. Pervova, A. V. Pestov // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2014. - Vol.50, №5. - С. 654-658. - Bibliogr. : p. 658 (30 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): POLYMERS -- TRIMETHYLENE CARBONATE -- DIALKYL CARBONATES Аннотация: With the aim of production of polymers for medicine a new preparation method was developed for trimethylene carbonate based on transesterification with trimethylene glycol of dialkyl carbonates obtained without the use of phosgene. As initial reagents alkylene carbonates or polycarbonates and titanium alkoxides can be utilized. The advantages of this approach consist in obtaining some additional useful substances and the possibility of reprocessing polycarbonate wastes \\\\expert2\\nbo\\Russian Journal of Organic Chemistry\\2014, 50, (5), 654-658.pdf |