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Общее количество найденных документов : 38
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1.

Вид документа : Статья из журнала
Шифр издания : 54/С 71
Автор(ы) : Харчук В. Г., Корякова О. В., Хмара Е. Ф., Уймин М. А.
Заглавие : Спектральные проявления активных центров на поверхности наноразмерного оксида меди = Ftir study of the active centers on surface of ultrafine copper oxide
Место публикации : Аналитика и контроль. - 2005. - Т. 9, № 4. - С. 423-427
Примечания : Библиогр.: с. 427 (10 назв.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Приводятся результаты ИК спектроскопического изучения активных центров нанокристаллических оксидов меди, основанного на выделении специфических взаимодействий молекул-зондов: H2O, CO2, NH3
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2.

Вид документа :
Шифр издания : 54/X 10
Автор(ы) : Kuznetsov M. V., Zapevalov A. Ya., Zolotukhina L. V., Arefiev I. G., Gelchinsky B. R.
Заглавие : X-ray photoelectron spectroscopy of ultradispersed copper alloy powder surface after processing by fluorinated polyethers
Место публикации : Journal of Surface Investigation. - 2011. - Vol.5, №3. - С. 447-453
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): x-ray photoelectron spectroscopy --polyethers
Аннотация: Ultradispersed powders of Cu-Sn alloy were processed by fluorinated polyethers of different compositions. X-ray photoelectron spectroscopy was used to show that a polymeric film no thicker than 2 nm was formed on the surface of particles as a result of processing. The film formed by fluorinated polyethers with a molecular mass of 3000 prevents the interaction of metal particles of Cu-Sn alloy with atmospheric oxygen and provides dielectric properties of the surface
\\\\Expert2\\nbo\\Journal of Surface Investigation\\2011, v. 5, p. 447.pdf
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3.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Verbitskiy E. V., Cheprakova E. M., Subbotina J.O., Schepochkin A. V., Slepukhin P. A., Rusinov G. L., Charushin V. N., Chupakhin O. N., Makarova N. I., Metelitsa A. V., Minkin V. I.
Заглавие : Synthesis, spectral and electrochemical properties of pyrimidine-containing dyes as photosensitizers for dye-sensitized solar cells
Место публикации : Dyes and Pigments. - 2014. - Vol.100. - С. 201-214
Примечания : Bibliogr. : p. 213-214 (37 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): organic dyes --pyrimidine--microwave-assisted
Аннотация: Six novel donor–π–acceptor organic dyes bearing a pyrimidine as the anchoring group have been obtained in good yields by combination of the microwave-assisted Suzuki cross-coupling and nucleophilic aromatic substitution of hydrogen reactions. Their absorption, photoluminescence and electrochemical properties were fully investigated in detail. The infrared spectra of dyes adsorbed on TiO2 indicate the formation of coordinate bonds between the pyrimidine ring of dyes and the Lewis acid sites (exposed Tin+ cations) of the TiO2 surface. This work demonstrates that the pyrimidine rings of dye sensitizers that form a coordinate bond with the Lewis acid site of a TiO2 surface are promising candidates as the electron-withdrawing anchoring group. The data from quantum calculations show that all of the dyes are potentially good photosensitizers for dye-sensitized solar cells
\\\\expert2\\NBO\\Dyes and Pigments\\2014, v. 100, p.201-214.pdf
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4.

Вид документа : Статья из сборника (однотомник)
Шифр издания : 54/S 98
Автор(ы) : Zasuhin A.S., Neudachina L.K., Moskaleva Yu.S., Osipova O. A., Yatluk Yu. G.
Заглавие : Synthesis, characterization and application of a new modified polysiloxane with grafted 2-aminoethylpyridine functional groups
Место публикации : Modern problems of Surface Chemistry and Physics : International Symposium devoted to the 80th anneversary of Academician O. O. Chuiko, Kyiv, 18-21 May 2010 : abstracts. - Kyiv, 2010. - С. 350-351: il.
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
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5.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Radionava E. S., Fedorova O. V., Titova Yu. A., Rusinov G. L., Charushin V. N.
Заглавие : Synthesis of podands with dihydropyrimidine fragments based on polyethers with terminal acetoacetamide groups [Электронный ресурс]
Место публикации : Chemistry of Heterocyclic Compounds. - 2015. - Vol. 51, № 5. - С. 478-482
Систем. требования: http://apps.webofknowledge.com/
Примечания : Bibliogr. : p. 482 (19 ref.). - 18.01.2016
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): acetoacetamide-containing podands --dihydropyrimidine-containing podands--acetylketene
Аннотация: Reactions of aliphatic aminopodands having different length of the polyether chain with acetoacetic ester and 2,2,6-trimethyl-4H-1,3-dioxin-4-one were studied. The interaction of aminopodands with acetoacetic ester in toluene upon sonication (60A degrees D) or heating (90A degrees D) gave podands with terminal aminocrotonate fragments. The use of dioxinone at the same temperature allowed to transform aminopodands into aliphatic acetoacetamide-containing podands. An asymmetric podand with 2-pyridone fragment was isolated as byproduct from the reaction of dioxinone with 1,5-diamino-3-oxapentane. A three-component Biginelli reaction of acetoacetamidecontaining podands with benzaldehyde and urea in the presence of catalytic amounts of polyphosphoric acid immobilized on nanosized TiO2-SiO2 oxide surface enabled the synthesis of podands with 1,4-dihydropyrimidin-2-(1De)-one fragments.
\\\\expert2\\nbo\\Chemistry of Heterocyclic Compounds\\2015, v.51, N 5, p. 478-482.pdf
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6.

Вид документа : Статья из журнала
Шифр издания : Г/S 98
Автор(ы) : Bakhteeva I. A., Medvedeva I. V., Byzov I. V., Konev A. S., Zhakov S. V., Uimin M. A., Demin A. M., Murzakaev A. M., Medvedeva O. M.
Заглавие : Synthesis of Fe@C nanoparticles containing sulfo groups on their surfaces and study of their aggregation behavior in aqueous media
Место публикации : Russian chemical bulletin. - 2021. - Vol. 70, № 4. - С. 722-731
ББК : Г
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): magnetic nanoparticles--iron-carbon--benzenesulfonic acid--ir spectroscopy
Аннотация: Magnetic iron nanoparticles (MNPs) encapsulated in a carbon shells and containing sulfo groups on the surface (Fe@C-SO3H) were synthesized. The aggregative stability of aqueous suspensions of the Fe@C-SO3H nanoparticles was studied in solutions of bovine serum albumin and calcium chloride and in phosphate-buffered saline, which simulate blood plasma. It is shown that the Fe@C-SO3H particles practically do not aggregate in the phosphate buffer saline for a long time (several days). On the contrary, MNPs encapsulated in a protein shells using ultrasonic treatment form aggregates up to 110–120 nm in size under these conditions. Suspensions of the Fe@C-SO3H particles are stable in aqueous solutions of calcium chloride in the range of the solid phase concentration between 0.05 and 0.10 g L−1. The results obtained indicate the possibility of using the functionalized Fe@C-SO3H nanoparticles in vitro experiments in biological media.
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7.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Young Rang Uhm , Hi Min Lee , Fedorova O. V., Ovchinnikova I. G., Valova M. S., Rusinov G. L., Charushin V. N., Chang Kyu Rhee
Заглавие : Synthesis of carbon encapsulated metal (Ni and Cu) nano particles and applications for chiral catalysts
Место публикации : Research on Chemical Intermediates . - 2010. - Vol. 36, № 6-7. - С. 867-873
Примечания : Bibliogr. : p. 873 (15 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Carbon-encapsulated Ni and Cu nanoparticles with a core/shell structure were synthesized by levitational gas condensation (LGC). Methane (CH4) gas was used to coat the surface of the Ni and Cu nanoparticles. The Ni particles had a core diameter of 10 nm, and were covered by 2–3 nm thin carbon layers. In the case of Cu, the particles had a core diameter of 30 nm, and multi-shells with a thickness of 2–3 nm. Biginelli reaction in the presence of l-proline and Ni encapsulated nanoparticles was carried out to change the ratio between stereoisomers in favor of the S-enantiomer for 3,4–dihydropyrimidine (DHPM) with an excess of about 18%
\\\\Cserver\\dist\\НБО\\Электронная библиотека_Библиогр1\\Research on Chemical Intermediates\\2010, v. 36, N. 6-7, p.867.pdf
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8.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Zasuhin A.S., Neudachina L.K., Yatluk Yu. G., Adamova L. V., Osipova O. A., Gorbunova E. M., Moskaleva Yu.S., Lapina T. Yu.
Заглавие : Synthesis and surface structural characteristics of new polysiloxane xerogel [Electronic resource]
Место публикации : Russian Journal of Physical Chemistry A, Focus on Chemistry. - 2011. - Vol. 85, № 3. - С. 478-482: ил.
Систем. требования: http://www.springerlink.com/content/x72481r887108274/fulltext.pdf
Примечания : Bibliogr. : p. 482 (24 ref.). - 17.10.2011
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Pyridylethylaminopropylpolysiloxane xerogel (PEAPPSX) was synthesized by sol-gel technology. The composition of the substance was determined via elemental analysis and 1H NMR spectroscopy. The surface structural characteristics of the xerogel were determined by electron microscopy and low-temperature nitrogen sorption; thermal analysis was also performed. It was established that the content of functional groups in PEAPPSX was 2.43 mmol/g, and that xerogel is a mesoporous substance with a developed surface (121.71 m(2)/g)
\\\\Expert2\\nbo\\Russian Journal of Physical Chemistry A, Focus on Chemistry\\2011, V.85, N 3, p.478.pdf
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9.

Вид документа : Статья из журнала
Шифр издания : Г/S 98
Автор(ы) : Koryakova O. V., Valova M. S., Titova Y. A., Fedorova O. V., Murashkevich A. N.
Заглавие : Synthesis and spectroscopic study of Si, Ti, Mg, and Zn oxides modified by L-Proline
Место публикации : Journal of Applied Spectroscopy. - 2021. - Vol. 88, № 3. - С. 519-527
ББК : Г
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Individual and mixed oxides of Zn, Mg, Si, and Ti modified with L-proline during their solgel synthesis have been obtained. The IR spectra of these oxides studied in detail show changes in the vibrational band parameters of the siliconoxygen and metal–oxygen bonds. Enhancement of the amount of basic sites on the SiO2–TiO2 mixed oxide was found after removal of L-proline from the surface. The use of SiO2–Mg(OH)2* L-proline composite as a catalyst leads to an enhanced enantiomeric excess of some asymmetric Biginelli reaction products up to 18%.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Dorosheva I. B., Valeeva A. A., Rempel A. A., Trestsova M. A., Utepova I. A., Chupakhin O. N.
Заглавие : Synthesis and physicochemical properties of nanostructured TiO2 with enhanced photocatalytic activity
Место публикации : Inorganic Materials. - 2021. - Vol. 57, № 5. - С. 503-510
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): titanium dioxide--sol–gel method--photocatalysis
Аннотация: Nanostructured titanium dioxide (TiO2) with a crystallite size from 10 to 85 nm, photocatalytically active for organic reactions under illumination with visible light, has been prepared by a sol–gel process using a titanium tetrabutoxide solution in ethanol with an initial pH of 6. According to X-ray diffraction characterization results, the as-prepared titanium dioxide was amorphous. Annealing in a hydrogen atmosphere for 1 h at 400°C led to the formation of an anatase phase, and annealing in the temperature range from 600 to 800°C resulted in the anatase–rutile phase transition. The crystallite size of titanium dioxide increased from 10 to 75 nm as the annealing temperature was raised from 400 to 1000°C (furnace annealing for 1 h) and from 60 to 85 nm as the annealing time at a temperature of 800°C was increased from 30 to 240 min. Diffuse reflection spectra showed that the band gap of TiO2 decreased from 3.3 to 2.6 eV as the annealing temperature was raised from 200 to 1000°C. The specific surface area data obtained by BET measurements showed that the samples annealed at the highest temperature (1000°C) had the smallest surface area, which dropped from 307 to 1m2/g. The efficiency of the synthesized TiO2 tested as a catalyst for oxidative S H N cross-coupling of acridine with indole demonstrated an in crease in product yield from 35 to 80% as the annealing temperature was raised to 800°C. Varying the 800°C annealing time from 30 to 180 min had no effect on the reaction product yield, which ranged from 70 to 80%.
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