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Поисковый запрос: (<.>K=SORBENTS<.>)
Общее количество найденных документов : 19
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 1-10    11-19 
1.
Инвентарный номер: нет.
   
   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
ББК 54
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.

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2.
Инвентарный номер: нет.
   
   N 52


   
    New hybrid chelating sorbents with grafted 3-aminopropionate groups based on mixed silicon, aluminum, titanium, or zirconium oxides [Electronic resource] / Yu. G. Yatluk, N. A. Zhuravlev, O. V. Koryakova, L. K. Neudachina, Yu. A. Skorik // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2005. - Vol. 54, № 8. - P1836-1841
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A series of new hybrid organo-inorganic sorbents with the 3-aminopropionate chelating group was synthesized. The synthesis includes the copolycondensation (sol—gel method) of tetraethoxysilane, 3-aminopropyltriethoxysilane, and several modifiers (MeSi(OEt)3, EtSi(OEt)3, Ti(OEt)4, AlONO3, ZrOCl2) followed by carboxyethylation with acrylic acid. The obtained chelating sorbents were characterized by elemental analysis, FT-IR and 1H NMR spectroscopy, and thermogravimetry. The N-carboxylated sorbents have a higher sorption capacity with respect to metal ions (0.5–0.9 mmol g?1, pH 6.3, NH4OAc, 20 °C) than the starting sorbents with the primary amino group (0.05–0.2 mmol g?1) and manifest high selectivity for copper(II) ion extraction

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2005, 54 (8), 1836.pdf
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3.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis and sorption properties of new hybrid chelating sorbents with ?-alanine functional groups [Electronic resource] / Yu. G. Yatluk, D. V. Eremin, L. K. Neudachina, Yu. A. Skorik // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2004. - Vol. 53, № 12. - P2730-2735
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A series of gamma-aminopropylsilylated sorbents was obtained from different oxide supports (silica gels, silica fillers, macroporous glasses, alumina) and by the direct synthesis (hydrolytic polycondensation of tetraalkoxysilanes with gamma-aminopropyltriethoxysilane). The highest degree of immobilization was achieved for silicas, while the most convenient solvent was methanol. Sorbents with beta-alanine functional groups were obtained by the subsequent reaction with acrylic acid. The degree of beta-carboxyethylation was 1.3–1.9, and the highest content of functional groups (vCOOH = 3.23 mmol g–1) was achieved for carboxyethylated xero gel synthesized by the copolycondensation of tetraethoxysilane with -aminopropyltriethoxysilane. The sorbents containing beta-alanine possess a higher selectivity of Cu2+ ion sorption than the initial gamma-aminopropylsilylated sorbents

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2004, 53 (12), 2730.pdf
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4.
Инвентарный номер: нет.
   
   S 83


   
    Stereochemical features of addition of O- and C-nucleophiles to 5-(Het)aryl-2,3-dicyano-1-ethylpyrazinium salts [Electronic resource] / E. V. Verbitskiy, G. L. Rusinov, P. A. Slepukhin, A. N. Grishakov, M. A. Ezhikova, M. I. Kodess, V. N. Charushin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2008. - Vol. 44, № 2. - P302-310
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Stable delta(H)-adducts of O- and C-nucleophiles were obtained with cations of 5-(het)aryl-2,3-dicyano-1-ethylpyrazinium, and their structure was investigated by X-ray diffraction analysis. Analytical separation was performed of 1,2-dihydropyrazines into individual enantiomers by means of HPLC on columns with chiral sorbents

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2008, 44 (2), 302.pdf
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5.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis and analytical usage of hybrid sorbents on basis N-substituted-3-aminopropoionic [Text] / L. K. Neudachina, N. V. Lakiza, Yu. G. Yatluk, A. A. Vshivkov // International Congress on Analytical Sciences ICAS - 2006, M., 25-30 June 2006 : book of abstracts . - М., 2006. - Vol. 2. - P661-662
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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6.
Инвентарный номер: нет.
   
   Y 32


    Yatluk, Yu. G.
    Hybrid silica-based chelating sorbents with beta-alanine functional groups [Text] / Yu. G. Yatluk, Yu. A. Skorik // International conference "From molecules towards materials" : IV Razuvaev lectures, Russia, Nizhny Novgorod, Septemper 3-11, 2005. - Nizhny Novgorod, 2005. - P125 : il. - Bibliogr. : p. 125 (2 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
CHELATING SORBENTS -- SILICA-BASED MATERIALS -- OXIDE -- HYDROLISIS

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7.
Инвентарный номер: нет.
   
   S 73


   
    Sorbents based on modified polysiloxanes [Text] / L. K. Neudachina, A. Y. Golub, Yu. G. Yatluk, V. A. Osipova, Yu. A. Berdugin, E. M. Gorbunova, L. V. Adamova, O. V. Koryakova, M. V. Kuznetsov // Inorganic Materials. - 2011. - Vol. 47, № 4. - P435-441 : ил. - Bibliogr. : p. 441 (15 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Organic-inorganic hybrid sorbents based on a polysiloxane modified with amino and thiourea groups have been synthesized for the first time by a sol-gel process. The structure of the sorbents has been determined by X-ray photoelectron spectroscopy and IR spectroscopy. Their thermal stability has been assessed and the mechanism of their degradation has been elucidated. The structural and adsorption parameters of the sorbents have been evaluated. The results demonstrate that the introduction of amino groups into the structure of the polysiloxane yields an effective sorbent for Pb(II) extraction and enables Cu(II) and Zn(II) separation from Co(II) and Ni(II). The thiourea-modified polysiloxane selectively sorbs Bi(III) (0.1-2 M HCl), Pt(IV) (pH 2), and Pb(II) (pH 3). Divalent Co, Ni, Cu, and Zn can be sorbed from alkaline solutions

\\\\Expert2\\nbo\\Inorganic Materials\\2011, v.47, N 4, p. 435.pdf
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8.
Инвентарный номер: нет.
   
   А 62


   
    Аминированные полисилоксаны как сорбционные материалы для извлечения ионов тжелых металлов [] = Aminopolysiloxanes as sorbents for remove of heave metal ions / Н. В. Лакиза, Л. К. Неудачина, Т. А. Редькина, А. В. Пестов, В. А. Осипова // XLVI Всерос. конф. по проблемам математики, информатики, физики и химии, М., 19-23 апр. 2010 г. : тез. докл. - М., 2010. - С. 51-53
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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9.
Инвентарный номер: нет.
   
   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
ББК 54
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.

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10.
Инвентарный номер: нет.
   
   S 70


   
    Sol-Gel Synthesis and Physicochemical Properties of Organosilicon Materials Functionalized by Amino Groups / L. K. Neudachina, N. V. Lakiza, A. V. Pestov, V. A. Osipova, L. V. Adamova, E. M. Gorbunova // Glass Physics and Chemistry. - 2011. - Vol.37, № 5. - С. 537-544
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
"SOL-GEL" MATERIALS -- AMINOPOLYSILOXANES -- SPECIFIC SURFACE AREA
Аннотация: The hybrid materials based on polysiloxane modified by amino groups have been synthesized by the sol-gel method. Aminated polysiloxane has been prepared by the copolycondensation reaction of tetraethoxysilane with gamma-aminopropyltriethoxysilane (APS-1) and through the modification of the product (APS-2) of the hydrolysis of tetraethoxysilane by gamma-aminopropyltriethoxysilane. The composition of sorbents has been confirmed by the elemental analysis and IR Fourier spectroscopy. The high degree of sorption extraction of copper(II), nickel(II), cobalt(II), zinc(II), cadmium(II), and lead(II) ions in the case of their coexistence in an ammonia-acetate buffer solution has been observed for polysiloxanes APS-2. The synthesized surface-modified materials exhibit the highest selectivity to nickel(II) and cobalt(II) ions

\\\\Expert2\\nbo\\Glass Physics and Chemistry\\2011, V. 37, N 5, P.537-544.pdf
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