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 |
R 30 Reactivity of nanocrystalline copper oxide and its modification under magnetic field [Text] / A. Ye. Yermakov [и др.] // Solid State ionics. - 2004. - Vol. 172, № 1-4. - P317-323 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The influence of magnetic field on the rate of oxidative dehydrogenation of 2,3,5-trimetyl-1,4-hydroquinone (TMHQ) to 2,3,5-trimetyl-1,4-benzoquinone (TMBQ) with catalysts based on copper oxide nanopowders has been investigated. The initial transformation rate of TMHQ and the final product yield greatly increase after a preliminary magnetization of nanopowders. The adsorption ability of Cu-oxide-based nanopowders with respect to ammonia enhances by 1.5 after their magnetization. Physical mechanism of reactivity variation of CuO nanopowders under the influence of weak stationary external magnetic field (H?3 kOe) has been proposed. As a result of magnetic field influence, the ferromagnetic regions with modified spin and charge state have appeared in an antiferromagnetic CuO of nonstoichiometric composition. These regions can be new catalytic or adsorption centers \\\\Cserver\\dist\\НБО\\Электронная библиотека_Библиогр1\\Solid State Ionics\\2004, v.172, N 1-4, p.317.pdf |
U 88 Use of low-molecular polyacrylic acid as the dispersant of Nd3+, Yb3+ doped Y2O3 nanoparticles for slip casting and sintering of laser ceramics [Text] / I. Puzyrev, M. Ivanov, V. Osipov, Yu. G. Yatluk // Nanotech Insight 2007 : The International conference on Nanotechnology, Luxor, Egypt, 10-17 march 2007 : abstr. . - Luxor, Egypt, 2007. - P310-311 : табл. - Bibliogr. : p. 311 (3 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ |
S 98 Synthesis of carbon encapsulated metal (Ni and Cu) nano particles and applications for chiral catalysts [Text] / Young Rang Uhm , Hi Min Lee , O. V. Fedorova, I. G. Ovchinnikova, M. S. Valova, G. L. Rusinov, V. N. Charushin, Chang Kyu Rhee // Research on Chemical Intermediates . - 2010. - Vol. 36, № 6-7. - P867-873. - Bibliogr. : p. 873 (15 ref.) 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 |
R 30 Reactivity features of polychlorobiphenyl congeners in the nucleophilic substitution reactions / T. I. Gorbunova, M. G. Pervova, V. I. Saloutin, O. N. Chupakhin // Russian Journal of General Chemistry. - 2012. - Vol. 82, № 1. - С. 138-143. - Bibliogr. : p. 143 (18 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): POLYCHLORINATED-BIPHENYLS -- IRON -- DECHLORINATION -- NANOPARTICLES -- PCBS Аннотация: Groups of congeners and individual congeners of polychlorobiphenyls contributing to the composition of the technical mixture "Sovol" (PCB 60, PCB 64, PCB 70, PCB 74, PCB 97, PCB 101, PCB 105, PCB 110, PCB 118, PCB 138, PCB 149, PCB 156, and PCB 163) were synthesized by the reaction of aryl-aryl coupling. The interaction of the congeners with sodium methoxide was performed and their complete conversion was proved. By means of gas chromatography-mass spectrometry the PCBs methoxy derivatives were identified. The data on the reactivity of the individual polychlorobiphenyl congeners were precised |
A 25 Aggregative stability of the CdS nanoparticles-H2O colloidal dispersion system in the presence of surfactants / N. S. Kozhevnikova, T. I. Gorbunova, A. S. Vorokh, D. N. Bazhin, A. Ya. Zapevalov, V. I. Saloutin, A. A. Rempel, O. N. Chupakhin // Doklady Chemistry. - 2012. - Vol.443, №1. - С. 86-90 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): CdS -- COLLOIDAL DISPERSION SYSTEM -- AGGREGATIVE STABILITY \\\\Expert2\\nbo\\Doklady Chemistry\\2012, v. 443, N 1, p. 86-90.pdf |
D 49 Development of methods for preparation of Nd : YAG nanoparticles / I. S. Puzyrev, I. V. V'yukhina, M. Ivanov, Yu. G. Yatluk // Glass Physics and Chemistry. - 2012. - Vol.38, №4. - С. 427-430 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): 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 |
D 38 Demin, A. M. Covalent surface modification of Fe3O4 magnetic nanoparticles with alkoxy silanes and amino acids [Электронный ресурс] / A. M. Demin, V. P. Krasnov, V. N. Charushin // Mendeleev Communications. - 2013. - Vol.23, №1. - P14-16 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): Fe3O4 -- MAGNETIC NANOPARTICLES -- ALKOXY SILANES Аннотация: (3-Aminopropyl)silane-modified magnetic nanoparticles containing ε-aminocaproic acid and l-lysine fragments with free functional groups were obtained by the surface modification of Fe3O4 with alkoxysilane derivatives \\\\Expert2\\NBO\\Mendeleev Communications\\2013, v.23, p. 14.pdf |
F 97 Functionalization of Fe3O4 magnetic nanoparticles with RGD peptide derivatives [Electronic resource] / A. M. Demin, A. Yu. Vigorov, I. A. Nizova, M. A. Uimin, N. N. Shchegoleva, A. E. Ermakov, V. P. Krasnov, V. N. Charushin // Mendeleev Communications. - 2014. - Vol.24, №1. - С. 20-22. - Bibliogr. : p. 22 (16 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): RGD PEPTIDE -- GLUTARIC ACID MOIETY -- MAGNETIC NANOPARTICLES Аннотация: Derivatives of RGD peptide, such as Nω-Pbf-l-Arg-Gly-l- Asp(OAlk)2 (Alk = Me or But), which contain glutaric acid moiety as a linker, were synthesized and immobilized to Fe3O 4 magnetic nanoparticles obtained by gas condensation method \\\\expert2\\nbo\\Mendeleev Communications\\2014, v.24, p. 20.pdf |
S 70 Sol-gel synthesis of titanum dioxide by hydrolysis of titanium glycerolates and peroxides [Electronic resource] / V. A. Osipova, G. S. Zakharova, E. Andreikov, Yu. G. Yatluk, I. Puzyrev // Glass Physics and Chemistry. - 2013. - Vol.39, №4. - С. 398-402. - Bibliogr. : p. 402 (11 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): 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 |
S 98 Synthesis of derivatives of the RGD peptide with the residues of glutaric and adipic acids [Electronic resource] / A. Yu. Vigorov, I. A. Nizova, V. P. Krasnov, A. M. Demin // Russian Journal of Bioorganic Chemistry. - 2014. - Vol.40, №2. - С. 142-150. - Bibliogr. : p. 149-150 (42 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): AMINO ACIDS -- PEPTIDE SYNTHESIS -- RACEMIZATION Аннотация: Derivatives of the RGD peptide were prepared by the attachment of the residues of glutaric and adipinic acids to the α-amino group of L-arginine. This modification allowed condensation of these derivatives with other biomolecules or nanoparticles \\\\expert2\\nbo\\Russian Journal of Bioorganic Chemistry\\2014, v.40, N 2, p.142-150.pdf |
I-55 Immobilization of pmida on Fe3O4 magnetic nanoparticles surface: mechanism of bonding / A. M. Demin, A. V. Mekhaev, V. P. Krasnov, A. A. Esin, D. K. Kuznetsov, P. S. Zelenovskiy, Y. Y. Shur // Applied surface science. - 2018. - V 440. - С. 1196-1203 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): FTIR -- MAGNETIC NANOPARTICLES -- MECHANISM OF IMMOBILIZATION -- PMIDA -- TGA -- XPS Аннотация: The mechanism of N-phosphonomethyl iminodiacetic acid (PMIDA) binding with the Fe3O4 magnetic nanoparticle (MNPs) surface by Fourier transformed infrared spectroscopy, X-ray photoelectron spectroscopy and thermogravimetry was comprehensive studied. To study of microstructure, size and core structure of synthesized nanoparticles the scanning electron microscopy, X-ray diffraction analysis and Raman spectroscopy were carried out. A new scheme for the tridentate bonding of the phosphonomethyl derivative with surface Fe atoms involving unequal P–O–Fe bonds was proposed. The mechanism of thermal decomposition of PMIDA molecules on the MNP surface was studied using a thermogravimetric analyzer combined with infrared spectrometer. It was shown for the first time that during the thermal treatment of phosphonomethyl-modified MNPs, PMIDA molecules are not desorbed from the surface of MNPs but gradually decompose. We believe that obtained in this work data will be useful for a deeper understanding of the mechanisms of phosphonic acid derivatives interaction with MNPs, as well as in the design of new biomedical materials, in which the conjugation of biomolecules with carboxyl groups of PMIDA-modified MNPs is assumed. |
Silica coating of Fe3O4 magnetic nanoparticles with pmida assistance to increase the surface area and enhance peptide immobilization efficiency / A. M. Demin, A. I. Maksimovskikh, A. V. Mekhaev [и др.] // Ceramics international. - 2021. - № б/н. - P1-6 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
M 78 Modification of Fe3O4 magnetic nanoparticles with a GRGD peptide / A. M. Demin, A. V. Vakhrushev, A. V. Mekhaev [и др.] // Russian chemical bulletin. - 2021. - Vol. 70, № 3. - С. 449-456 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): MAGNETIC NANOPARTICLES -- RGD PEPTIDES -- PEPTIDE SYNTHESIS Аннотация: Derivatives of RGD peptides are promising vector molecules for targeting biomolecules and nanoparticles into tumor tissues and are used for the design of diagnostic agents. The immobilization of the glutaryl-containing derivative of Gly-L-Arg(Pbf)-Gly-L-Asp(OMe)2 (GRGD) tetrapeptide on Fe3O4 magnetic nanoparticles (MNPs) was studied. The results of thermogravimetric and elemental analysis, as well as IR spectroscopy, were used to estimate the amount of organic components at each stage of modification of MNPs. |
S 98 Synthesis of Fe@C nanoparticles containing sulfo groups on their surfaces and study of their aggregation behavior in aqueous media / I. A. Bakhteeva, I. V. Medvedeva, I. V. Byzov [et al.] // Russian chemical bulletin. - 2021. - Vol. 70, № 4. - P722-731 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): 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. |
S 98 Synthesis and antimicrobial activity of silicon-titanium-zinc- and silicon-titanium-boron-containing glycerohydrogels / T. G. Khonina, E. Yu. Nikitina, E. V. Shadrina [et al.] // Russian chemical bulletin. - 2021. - Vol. 70, № 5. - P967-974 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Novel pharmacologically active silicon—titanium—zinc- and silicon—titanium—boron-containing glycerohydrogels were synthesized by the sol—gel method using silicon, titanium, zinc, and boron glycerolates as biocompatible precursors. The compositions and structural features of the hydrogels were studied by transmission electron microscopy, scanning electron microscopy, IR spectroscopy, atomic emission spectrometry, and elemental analysis methods. The disperse phase and liquid water—glycerol medium of the hydrogels were isolated by cold exhaustive extraction with ethanol and characterized. The 3D polymeric network of the gels is formed by the products of hydrolysis and subsequent (co)condensation of silicon-/silicon—boron-containing precursors. Titanium and zinc glycerolates undergo no hydrolytic transformations under gelation conditions and exist in the cells of the 3D polymeric network in the form of amorphous nanoparticles that are not linked to the network by covalent bonds. Models of the structures were proposed. The gels are characterized by antimicrobial activity, which is more pronounced for the silicon—titanium—boron-containing gel, and they can be considered as promising drugs for topical treatment prepared by the simple, environmentally friendly, and cost-effective method. |
Design of SiO2/aminopropylsilane-modifi ed magnetic Fe3O4 nanoparticles for doxorubicin immobilization / A. M. Demin, A. V. Vakhrushev, M. S. Valova [et al.] // Russian chemical bulletin. - 2021. - Vol. 70, № 5. - P987-994 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): MAGNETIC NANOPARTICLES -- N-PHOSPHONOMETHYLIMINODIACETIC ACID -- DOXORUBICIN -- SiO2 COATING -- SORPTION Аннотация: Surface modifi cation of magnetic nanoparticles (MNPs) with tetramethylorthosilicate and 3-aminopropyltrimethoxysilane was studied. The use of N-phosphonomethyliminodiacetic acid for the stabilization of the initial MNPs can signifi cantly increase the coating thickness and specifi c surface area of SiO2/APS-modifi ed (APS is 3-aminopropylsilane) MNPs. The possibility of sorption of antitumor drug doxorubicin (DOX) on the synthesized nanoparticles was studied. The degree of sorption of DOX increases with an increase in the specifi c surface area of the particles. |
Variation in tumor pH affects pH-triggered delivery of peptide-modified magnetic nanoparticles / A. G. Pershina, O. Y. Brikunova, S. V. Vtorushin [et al.] // Nanomedicine: nanotechnology, biology and medicine. - 2021. - Vol. 32. - P102317 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): PH PROFILE -- ENDOCYTOSIS -- IRON OXIDE MAGNETIC NANOPARTICLES Аннотация: Acidification of the extracellular matrix, an intrinsic characteristic of many solid tumors, is widely exploited for physiologically triggered delivery of contrast agents, drugs, and nanoparticles to tumor. However, pH of tumor microenvironment shows intra- and inter-tumor variation. Herein, we investigate the impact of this variation on pH-triggered delivery of magnetic nanoparticles (MNPs) modified with pH-(low)-insertion peptide (pHLIP). Fluorescent flow cytometry, laser confocal scanning microscopy and transmission electron microscopy data proved that pHLIP-conjugated MNPs interacted with 4T1 cells in two-dimensional culture and in spheroids more effectively at pH 6.4 than at pH 7.2, and entered the cell via clathrin-independent endocytosis. The accumulation efficiency of pHLIP-conjugated MNPs in 4T1 tumors after their intravenous injection, monitored in vivo by magnetic resonance imaging, showed variation. Analysis of the tumor pH profiles recorded with implementation of original nanoprobe pH sensor, revealed obvious correlation between pH measured in the tumor with the amount of accumulated MNPs. |
Polystyrene stabilized iridium nanoparticles catalyzed chemo- and regio-selective semi-hydrogenation of nitroarenes to N-arylhydroxylamines / D. Bhattacherjee, G. V. Zyryanov, Shaifali [et al.] // Molecular catalysis. - 2021. - Vol. 514. - P111836 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): SUPPORTED IRIDIUM NANOPARTICLES -- N-ARYLHYDROXYLAMINE -- SEMI-HYDROGENATION Аннотация: Polystyrene stabilized Iridium (Ir@PS) nanoparticles (NPs) as a heterogeneous catalyst have been developed and characterized by IR, UV–Vis, SEM, TEM, EDX and XRD studies. The prepared Ir@PS catalyst showed excellent reactivity for chemo- and regio-selective controlled-hydrogenation of functionalized nitroarenes to corresponding N-arylhydroxylamine using hydrazine hydrate as reducing source and environmentally benign polyethylene glycol (PEG-400) as green solvent. The present methodology was applied for vast substrate scope and found to be compatible with wide range of reducible functional groups. The reaction performed at 85 °C or ambient temperature and completed within 5–80 minutes. The catalyst can easily be filtered out from reaction mixture and reusable. |
Modification of chemically and physically obtained Fe3O4 magnetic nanoparticles with L-Lys for cell labeling / A. M. Demin, O. F. Kandarakov, A. S. Minin [et al.] // Russian chemical bulletin. - 2021. - Vol. 70, № 6. - P1199-1208 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Peculiar features of the modification of Fe3O4 magnetic nanoparticles (MNPs) obtained by co-precipitation from solutions of FeII and FeIII salts (10-nm MNPs) and by the gas-condensation method (30-nm MNPs) with 3-aminopropylsilane and then with L-lysine were studied. The chemically obtained MNPs possess more pronounced hydrophilic properties and therefore readily form stable aqueous colloidal solutions and can be loaded with a larger amount of L-Lys. However, samples based on the physically obtained MNPs were characterized by more efficient internalization and longer retention times by the NIH 3T3 cells. The results obtained can be used in the design of novel nanomaterials for magnetic cell labeling. |