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1.

Вид документа : Статья из журнала
Шифр издания : 54/S 89
Автор(ы) : Slepukhin P. A., Gruzdev D.A., Chulakov E.N., Levit G. L., Krasnov V. P., Charushin V. N.
Заглавие : Structures of the racemate and (S)-enantiomer of 7,8-difluoro-3-methyl-2,3-dihydro-4H-[1,4]benzoxazine
Место публикации : Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2011. - Vol.60, №5. - С. 955-960
Примечания : Bibliogr. : p. 960 (17 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): enantiomers --racemates--organofluorine compounds
Аннотация: The comparative X ray diffraction study of racemic and (S) enantiomer of 7,8 difluoro 3 methyl 2,3 dihydro 4H [1,4]benzoxazine was carried out. The both forms of benzoxazine are crystallized in the orthorhombic crystal system, the (S) enantiomer is crystallized in the chiral space group P212121, while the racemate is crystallized in the centrosymmetric Pbca space group. The bond lengths and bond and torsional angles in the both molecules are almost equal. The packing of the racemate is characterized by a closer interaction of polar NH...О groups.
\\\\expert2\\NBO\\Russian Chemical Bulletin\\2011, 60 (5), 955-960.pdf
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2.

Вид документа : Статья из журнала
Шифр издания : 54/I-83
Автор(ы) : Anzenbacher P., Mosca Jr. L., Palacios M. A., Zyryanov G. V., Koutnik P.
Заглавие : Iptycene-Based Fluorescent Sensors for Nitroaromatics and TNT
Место публикации : Chemistry - A European Journal. - 2012. - Vol.18, №40. - С. 12712-12718
Примечания : Bibliogr. : p. 12718 (15 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): explosives--fluorescence spectroscopy--nanofibres--sensors
Аннотация: Small-molecule fluorescent sensors (1–5) for the recognition of nitroaromatic compounds, such as 2,4-dinitrotoluene and the explosive TNT, were obtained by using a three-step dehydrohalogenation cycloaddition protocol. The interaction of the receptors and nitroaromatics was studied both in solution and in the solid state by using fluorescence spectroscopy and X-ray crystallography, respectively. It is shown that the iptycene receptors 1–5 provide a cavity suitable for binding nitroaromatic compounds in an edge-to-face mode, rather than simple ring-stacking interactions. The results obtained inspired us to develop an inexpensive, reliable and robust sensor for vapour detection of explosives. Polymer nanofibres are particularly suitable for the production of such TNT sensors as they accelerate the mass exchange between the polymer and the vapours of TNT. Quenching of the sensors took place within 1 min compared to 10 min for a glass-slide assay. Hence, the sensor performance can be improved by optimising the matrix material and morphology without resynthesising the sensor moieties
\\\\expert2\\NBO\\Chemistry - A European Journal\\2012. v. 18, N 40. p. 12712.pdf
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3.

Вид документа : Статья из журнала
Шифр издания : 54/T 44
Автор(ы) : Loginova I. S., Makarov V. A., Chupakhin O. N., Sidorova L. P., Perova N. M., Rusinov V. L.
Заглавие : The antiaggregant action of 2-morpholino-5-(thienyl-2)-6-H-1,3,4-thiadiazine in in vitro and ex vivo experiments
Место публикации : Eksperimental'naia i klinicheskaia farmakologiia . - 2013. - Vol.76, №2. - С. 13-16
Примечания : Библиогр.: с.
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): animal--blood clotting--cytology
Аннотация: The influence of 2-morpholino-5-(thienyl-2)-6-H-1,3,4-thiadiazine (H-29) on the platelet aggregation has been studied in experiments on donor plasma in vitro. It is established that H-29 causes a decrease in the platelet interaction induced by ADP and arachidonic acid. The influence of H-29 on platelet aggregation was also studied in ex vivo experiments with intravenous and oral administration, and some parameters of plasmatic hemostasis were evaluated
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4.

Вид документа : Статья из журнала
Шифр издания : 54/H 99
Автор(ы) : Suvorova A. I., Suvorov A. L., Tyukova I.S., Malysheva N. N., Okhokhonin A. V.
Заглавие : Hydrophilic nature and sorption—diffusion properties
Место публикации : Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2013. - Vol. 61, №3. - С. 555-562
Примечания : Bibliogr. : p. 562 (34 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): polysulfone--silica--sol—gel process
Аннотация: Hybrid nanocomposite films containing silica (11.4 wt.%) or titania (18.8 wt.%) in the polymer matrix were prepared by the sol—gel method using the hydrolytic polycondensation of tetraethoxysilane and tetrabutoxysilane in a THF solution of aromatic polymer, polysulfone (PSF). The influence of the oxide nature and the film composition on the structure, the interaction of the polymer with oxides, hydrophilicity, and sorption—diffusion properties of the hybrid films were studied by FTIR spectroscopy, atomic force microscopy, dynamic light scattering, and a complex of other physicochemical methods. The absence of chemical or intermolecular hydrogen bonds between the polymer and oxide particles in the PSF films was shown. The average size of the oxides (SiO2, 20 nm; TiO2, ~90 nm) in the films and roughness of their surface (~0.2—0.8 nm) were determined. The introduction of oxides into the polymer matrix increases the hydrophilic properties and the ability of the PSF films to swell in water; the diffusion coefficients of water and permeability of water vapor in the PSF films also increase. Titania also induces a more considerable change in the structure of the polymer matrix and more strongly affects the sorption—diffusion properties of the hybrid films in aqueous solutions of THF. All prepared nanocomposite films PSF/SiO2 and PSF/TiO2 are capable of extracting an organic component from aqueous solutions and can be used as sorbents and membrane films for the removal of organic substances from the aqueous medium
\\\\expert2\\NBO\\Russian Chemical Bulletin\\2012, 61 (3), 555-562.pdf
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5.

Вид документа : Статья из журнала
Шифр издания : 54/P 56
Автор(ы) : Kopchuk D. S., Kovalev I. S., Zyryanov G. V., Krasnov A. F., Medvedevskih A. S., Rusinov V. L., Chupakhin O. N.
Заглавие : Phenylglyoxal dihydrazones as unexpected products in the synthesis of 1,2,4-triazines by interaction of α-bromoacetophenones and arylhydrazides [Электронный ресурс]
Место публикации : Chemistry of Heterocyclic Compounds. - 2013. - Vol.49, №7. - С. 988-922
Систем. требования: http://download.springer.com/static/pdf/312/art%253A10.1007%252Fs10593-013-1336-8.pdf?auth66=1395809707_20312f20f5696aef5a260555edd53f7d&ext=.pdf
Примечания : Bibliogr. : p. 992 (14 ref.). - 24.03.2014
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): alfa-bromoacetophenone--1,2,4-triazine --phenylglyoxal dihydrazone
Аннотация: On interacting α-bromoacetophenones with aromatic carboxylic acid hydrazides, the formation of two reaction products was observed in certain cases, the expected 1,2,4-triazine and the phenylglyoxal dihydrazone as an unexpected product. The effect of substituents in the initial substrates and of the conditions of carrying out the synthesis on the direction of the reaction have been studied
\\\\expert2\\nbo\\Chemistry of Heterocyclic Compounds\\2013, v.49, N 7, p. 988-992.pdf
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6.

Вид документа : Статья из журнала
Шифр издания : 54/O-97
Автор(ы) : Gorbunova T. I., Pervova M. G., Panyukova A. A., Zapevalov A. Ya., Saloutin V. I.
Заглавие : Oxidation of highly chlorinated benzenes and biphenyls with potassium persulfate in the presence of perfluorinated radicals [Электронный ресурс]
Место публикации : Russian Journal of General Chemistry. - 2013. - Vol. 83, №9. - С. 1678-1686
Систем. требования: http://download.springer.com/static/pdf/588/art%253A10.1134%252FS1070363213090090.pd
Примечания : Bibliogr. : p. 1686 (25 ref.). - 11.04.2014
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): 1,2,3,4-tetrachlorobenzene--2,4,5-trichlorobiphenyl--2,5,4′-trichlorobiphenyl
Аннотация: The interaction of 1,2,3,4-tetrachlorobenzene, 2,4,5-trichlorobiphenyl, 2,5,4′-trichlorobiphenyl, a mixture of 1,2,3- and 1,2,4-trichlorobenzene, and industrial mixtures of polychlorinated biphenyls with potassium persulfate in the presence of potassium perfluorobutyrate has been investigated. The oxidation of highly chlorinated benzenes and biphenyls proceeds with lower conversion than that of the low-chlorinated compounds. The oxidation of the highly chlorinated aromatic substrates is not selective; the reaction mixture contains products of several competitive reactions: addition and elimination of radical species, disproportionation, isomerization, etc. The structures of the products have been determined by means of gas chromatography with mass spectrometric detection
\\\\expert2\\nbo\\Russian Journal of General Chemistry\\2013, V. 83, N 9, p. 1678–1686.pdf
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7.

Вид документа : Статья из журнала
Шифр издания : 54/B 12
Автор(ы) : Egorova D. O., Gorbunova T. I., Pervova M. G., Demakov V. A.
Заглавие : Bacterial degradation of a mixture obtained through the chemical modification of polychlorinated biphenyls by polyethylene glycols [Электронный ресурс]
Место публикации : Applied Biochemistry and Microbiology. - 2014. - Vol. 50, № 7. - С. 722-729
Систем. требования: http://download-v2.springer.com/static/pdf/131/art%253A10.1134%252FS0003683814070023.pdf?token2=exp=1428652880~acl=%2Fstatic%2Fpdf%2F131%2Fart%25253A10.1134%25252FS0003683814070023.pdf*~hmac=3182eca3e5ccea6ab1f49dd6b89a557b80a88fa01d0e203f57bcd3fed34fc4d2
Примечания : Bibliogr. : p. 729 (29 ref.). - 10.04.15
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): bacterial degradation--chemical modification--polyethylene glycols
Аннотация: Polychlorinated biphenyls (PCBs), also known by the trade name Sovol, are toxic industrial wastes. They have been subjected to chemical treatment by polyethylene glycols (PEGs) and potassium hydroxide. As a result of the interaction of the Sovol with various molecular mass PEGs (MMPEG-4 ∼ 200, MMPEG-22 ∼ 1000), water-soluble mixtures M1 and M2 containing mono(polyethylene glycol)oxy-derivatives (PCB-PEG-4 and PCB-PEG-22), polychlorobiphenylols, and unreacted PCB congeners (PCB 44, PCB 47, PCB 49, PCB 52, and PCB 66) were obtained. It was shown for the first time that mixtures M1 and M2 are susceptible to bacterial degradation without their fractionation. According to the gas-liquid chromatography with flame-ionization and mass-spectrometric detection, the Rhodococcus wratislaviensis KT112-7 strain degraded all of the chemical compounds occurring in the mixtures. In a 5-day experiment, it was found that the KT112-7 strain decomposes mono(polyethylene glycol)oxy-derivatives completely (by 100%) and polychlorobiphenylols and PCB congeners by 90–95% in the M1 and M2 mixtures. The culture medium did not contain transformation products, whereas free chlorine ions were accumulated (72–94% of the maximum possible amount). Thus, the use of the chemical modification and consecutive bacterial degradation provided an effective destruction of technical PCB mixtures with a high content of highly chlorinated congeners
\\\\expert2\\nbo\\Applied Biochemistry and Microbiology\\2014, v.50, N 7, p.722-729.pdf
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8.

Вид документа : Статья из журнала
Шифр издания : 54/P 41
Автор(ы) : Bratskaya S.YU., Privar Y. O., Korjakova O. V., Mechaev A., Pestov A. V.
Заглавие : Pentacyanoferrate(II) complexes with chitosan
Место публикации : Polymer Engineering and Science . - 2013. - С. Article in Press
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): sodium aminoprusside --polymer ligand (chitosan)--x-ray diffraction
Аннотация: New organic-inorganic materials based on products of interaction between sodium aminoprusside and polymer ligand (chitosan) have been synthesized. The composition of the obtained materials was characterized using the element analysis and X-ray diffraction; the Fourier transform infrared (FT-IR) spectroscopy and Thermogravimetric analysis data were used to propose the structure of the formed complexes. It was established that ion and ligand exchange were the main reactions at interaction of sodium aminoprusside with water-soluble chitosan salts. The comparative estimation of the sorption capacity with respect to cesium ions was performed for the synthesized complexes. It has been shown that the complex of chitosan with pentacyanoferrate(II) in the form of cobalt(II) salt has higher distribution coefficient with respect to Cs+ ions, as compared to cobalt aminoprusside. The maximum sorption capacity value for Cs+ was evaluated from the sorption isotherm and found to be equal to 0.3 mmol/g
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9.

Вид документа : Статья из журнала
Шифр издания : 54/S 89
Автор(ы) : Pavlova I. S, Pervova I. G., Lipunova G. N., Novikova R. K., Slepukhin P. A., Lipunov I. N.
Заглавие : Structure of substituted 2-(phenoxy)benzimidazoles [Электронный ресурс]
Место публикации : Crystallography Reports. - 2013. - Vol.58, №2. - С. 271-274
Систем. требования: http://download.springer.com/static/pdf/660/art%253A10.1134%252FS106377451302020X.pdf?auth66=1396080672_4d30017153423f0acbd549ed30355388&ext=.pdf
Примечания : Bibliogr. : p. 274 (7 ref.). - 27.03.2014
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): aryl fragments--azo-hydrazone--benzimidazoles
Аннотация: The synthesis and X-ray diffraction study of 1-benzyl-2-[2-(5- ethyltetrazole-2-yl)-phenoxy]-1H-benzimidazole and 1-benzyl-2-[2-(5- ethyltetrazole-2-yl)-4-nitrophenoxy]-1H-benzimidazole single crystals have been performed. The oxidative splitting of an azo-hydrazone group of 1-(2-hydroxy-(5-nitro)phenyl)-3-ethyl-5-(benzylbenzimidazolyl)formazans, a break in the C2-N1 bond, the interaction of o-hydroxyl group of aryl fragment with oxygen, and the formation of new 2-(phenoxy)benzimidazoles are found to occur in the presence of perchlorate iron(III).
\\\\expert2\\nbo\\Crystallography Reports (Кристаллография)\\2013, v.58, N 2, p.271-274.pdf
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10.

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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11.

Вид документа : Статья из журнала
Шифр издания : 54/C 45
Автор(ы) : Ivshina N. N., Bartashevich E. V., Potemkin V. A., Grishina M. A., Ishmetova R. I., Rusinov G. L., Latosh N. I., Slepukhin P. A., Charushin V. N.
Заглавие : Changes in the vibrational characteristics of substituted 1,2,4,5-tetrazines after complexation with 1,2,3-benzotriazole: A theoretical study [Electronic resource]
Место публикации : Journal of Structural Chemistry. - 2009. - Vol. 50, № 6. - С. 1053-1058
Систем. требования: http://www.springerlink.com/content/ag50570h40011132/fulltext.pdf
Примечания : 2.11.2011 г.
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The complexation of 3,6-substituted 1,2,4,5-tetrazines with benzotriazole was studied theoretically based on the vibrational spectra. For model complexes, the energy was minimized by the geometrical parameters, and the spectral characteristics were calculated by the PM3 method. The shift of the bond vibration frequencies of the atoms involved in complexation after the formation of different various intermolecular contacts was determined. This made it possible to determine the type of intermolecular interaction and suggest the structures of the complexes
\\\\Expert2\\nbo\\Journal of Structural Chemistry\\2009, V. 50, N 6, p.1053.pdf
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12.

Вид документа : Статья из сборника (однотомник)
Шифр издания : 54/S 53
Автор(ы) : Shcherbakov K. V., Burgart Ya. V., Saloutin V. I.
Заглавие : Interaction of fluorinated 4-hydrohycoumarins and 2-ethoxycarbonylchromone with aniline : доклад, тезисы доклада
Место публикации : 17th International Symposium on Fluorine Chemistry, Shanghai, China, July 24-29 2005 : abstract book. - Shanghai, 2005. - С. 42 (A-O-09): рис.
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
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13.

Вид документа : Статья из журнала
Шифр издания : 54/A 53
Автор(ы) : Khomutov O. G., Filyakova V. I., Kutchin A.V., Pashkevich K. I.
Заглавие : An efficient synthesis of alkylfluoroalkylketones
Место публикации : Journal of Fluorine Chemistry. - 1992. - Vol. 58, № 2-3. - С. 161
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Interaction of fluoroacyl chlorides with lithium tetraalkylaluminates II prepared by the hydroalumination of alkenes I results in fluorinated ketones III with yields of 65–70%.??RF = CF3, H(CF2)2, C4F9, C6F13 R1 = C3H7, C4H9, C6H13, C7H15??The reaction is simple and does not require an argon atmosphere, as is needed for most reactions of organoaluminum compounds????
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14.

Вид документа : Статья из журнала
Шифр издания : 54/L 79
Автор(ы) : Lipunova G. N., Nosova E. V., Charushin V. N.
Заглавие : Metallocomplexes of fluoroquinolonecarboxylic acids [Electronic resource]
Место публикации : Russian Journal of General Chemistry. - 2009. - Vol. 79, № 12. - С. 2753-2766
Систем. требования: http://www.springerlink.com/content/5u8u8261272t2u21/fulltext.pdf
Примечания : 17.10.2011
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The survey reviews the data on the synthesis, structure and biological activity of fluoroquinolonecarboxylic acids metal chelates. The influence of metal and ligand nature as well as conditions of the synthesis on the polyhedron type is discussed. The data on interaction between fluoroquinolone metal complexes and DNA are explored
\\\\Expert2\\nbo\\Russian Journal of General Chemistry\\2009, V. 79, N 12, p.2753.pdf
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15.

Вид документа : Статья из журнала
Шифр издания : 54/N 52
Автор(ы) : Tretyakov E. V., Utepova I. A., Varaksin M. V., Tolstikov S. E., Romanenko G. V., Bogomyakov A. S., Stass D. V., Ovcharenko V., Chupakhin O. N.
Заглавие : New approach to synthesis of nitronyl and imino nitroxides based on S(N)(H) methodology
Место публикации : ARKIVOC. - 2011. - Part 8. - С. 76-98: ил.
Примечания : Bibliogr. : p. 98 (36 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: It is shown that S(N)(H) approach opens new possibilities in the synthesis of polyfunctional nitronyl and imino nitroxides. It is found that the interaction of 4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-3-oxide-1-oxyl lithium salt Li1 with 3,6-diaryl-1,2,4-triazines leads to formation of the corresponding triazines bearing nitronyl nitroxide or imino nitroxide substituent at position 5 of the heterocycle. The reaction of Li1 with pyridazine-N-oxide gives rise to nitroxide with buten-3-ynyl substituent 5. Spin-labeled 5 could be readily transformed by the use of 1,3-dipolar and nucleophilic addition reactions, as well as oxidative coupling, that gives a large group of new paramagnets: 2-(1H-pyrazol-5-yl)vinyl-, 2-ethynylcyclopropyl-, 2-(3-(ethoxycarbonyl) isoxazol-5-yl)vinyl-, 1-(pyrrolidin-1-yl)but-3-ynyl-substituted nitronyl nitroxide and a diradical -2,2'-((1E,7E)-octa-1,7-dien-3,5-diyne-1,8-diyl)bis(4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-3-oxide-1-oxyl). The new nitroxides were characterized by X-ray single crystal data, ESR and static magnetic susceptibility measurements
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16.

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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17.

Вид документа : Статья из журнала
Шифр издания : 54/T 34
Автор(ы) : Fedin M., Zhilina E. F., Chizhov D. L., Charushin V. N.
Заглавие : Temperature-dependent zero-field splitting in a copper(ii) dimer studied by EPR
Место публикации : Dalton Transactions. - 2013. - Vol. 42, №13. - С. 4513-4521
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): magnetostructural correlations--temperature dependent--magnetic susceptibility
Аннотация: We report on the synthesis and temperature-dependent magnetic properties observed in an exchange-coupled copper(ii) dimer using X/Q-band Electron Paramagnetic Resonance (EPR) spectroscopy (9/34 GHz). It has been found that the zero-field splitting (D) in the dimer changes gradually by a factor close to two in the temperature range from T = 50 to 300 K. X-ray diffraction data show that this dimer consists of two five-coordinated copper ions, one of which has a highly asymmetric geometry intermediate between square pyramid and trigonal bipyramid. The copper-copper distance in the dimer is temperature-independent, whereas the degree of trigonality in an asymmetric unit decreases as the temperature is lowered. Therefore we suppose that the observed dependence D(T) originates from the interplay of different exchange interaction pathways driven by these thermal changes. Magnetic susceptibility measurements reveal weak ferromagnetic interactions, whose anisotropic parts should indeed be very sensitive to the subtle changes in the geometry and may result in apparent D(T). Apart from being a very unusual example of magneto-structural correlations, this and similar dimeric systems can be considered as an interesting type of new materials exhibiting strongly temperature-dependent magnetic p
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18.

Вид документа : Статья из журнала
Шифр издания : 54/R 30
Автор(ы) : Gorbunova T. I., Pervova M. G., Saloutin V. I., Chupakhin O. N.
Заглавие : Reactivity features of polychlorobiphenyl congeners in the nucleophilic substitution reactions
Место публикации : Russian Journal of General Chemistry. - 2012. - Vol. 82, № 1. - С. 138-143
Примечания : Bibliogr. : p. 143 (18 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): 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
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19.

Вид документа :
Шифр издания : 54/A 62
Автор(ы) : Gorbunova T. I., Zapevalov A. Ya., Bazhin D. N., Korshunov L. G., Gaviko V.S., Saloutin V. I.
Заглавие : Antifriction properties of new fluorine-containing derivatives of natural graphite
Место публикации : Russian Journal of Applied Chemistry. - 2012. - Vol.85, №1. - С. 102-107
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): antifriction properties --fluorine-containing derivatives--graphite
Аннотация: Interaction of natural graphite with potassium salts of perfl uoro(ω-chloroperfl uoro)carboxylic acids in the presence of potassium persulfate was studied. The derivatives obtained were used as independent lubricants for a chromium-containing-steel friction pair
\\\\Expert2\\nbo\\Russian Journal of Applied Chemistry\\2012, v. 85, N 1, p.102.pdf
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20.

Вид документа : Статья из журнала
Шифр издания : Г/I-60
Автор(ы) : Kholmogorova A. S., Fedoseeva E. A., Neudachina L. K., Osipova V. A., Pestov A. V.
Заглавие : Influence of the structure of the aminoalkyl group in polysiloxane on the selectivity of its interaction with metal ions
Место публикации : Russian Journal of Applied Chemistry. - 2021. - Vol. 94, № 4. - С. 478-485
ББК : Г
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Polysiloxanes containing nonchelating 3-aminopropyl and chelating N-(2-aminoethyl)-3-aminopropyl groups with the degree of functionalization of 28 and 24%, respectively, were prepared by sol–gel synthesis. The polysiloxanes obtained showed comparable activity in sorption of Pd(II), Pt(IV), Fe(III), Cd(II), Zn(II), Co(II), Ni(II), Cu(II), Mn(II), Pb(II), Ca(II), and Mg(II) ions from model multicomponent solutions. At pH 3,3-aminopropylpolysiloxane selectively takes up platinoid ions. The chelating structure of N-(2-aminoethyl)-3-aminopropyl groups leads to a decrease in the selectivity of the interaction with Pd(II) ions but increases the affinity for Fe(III), Ni(II), and Cu(II). Preconcentration in the dynamic mode allows quantitative sorption of Pd(II) and Pt(IV), followed by virtually quantitative elution of the metal ions from the sorbent surface.
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