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Труды сотрудников Института органического синтеза УрО РАН - результаты поиска

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Каталог книг и продолжающихся изданий
Сводный каталог иностранных периодических изданий, имеющихся в библиотеках УрО РАН
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Каталог препринтов УрО РАН (1975 г. - )
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Имидж-каталог иностранных книг (до 2010 г.)
Алфавитно-предметный указатель (АПУ) ЦНБ УрО РАН
Публикации об УрО РАН
Изобретения уральских ученых
Интеллектуальная собственность (статьи из периодики)
Нанотехнологии
Демидовские премии
Гибель династии Романовых
История Урала
Личная библиотека С. В. Вонсовского
Книжная коллекция Шубиных
Труды Института высокотемпературной электрохимии УрО РАН
Труды Института истории и археологии УрО РАН
Труды сотрудников Института горного дела УрО РАН
Труды сотрудников Института органического синтеза УрО РАН
Труды сотрудников Института теплофизики УрО РАН
Труды сотрудников Института химии твердого тела УрО РАН
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Труды сотрудников ЦНБ УрО РАН
Публикации Черешнева В.А.
Публикации Чарушина В.Н.
Каталог библиотеки ИЭРиЖ УрО РАН
Электронная энциклопедия «Дискурсология»
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1.

Вид документа : Статья из журнала
Шифр издания : 54/Ч-92
Автор(ы) : Чупахин О. Н., Береснев Д. Г.
Заглавие : Нуклеофильная атака на незамещенный атом углерода азинов и нитроаренов - эффективная методология построения гетероциклических систем : обзор
Параллельн. заглавия :Nucleophilic attack on the unsubstituted carbon atoms of azines and nitroarenes as an efficient strategy for constructing heterocyclic systems
Место публикации : Успехи химии. - 2002. - Т. 71, N 9. - С. 803-818: схем. - ISSN 0042-1308. - ISSN 0042-1308
Примечания : Библиогр. : с. 817-818 (69 назв.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Обобщены данные о новых методах синтеза конденсированных азинов с помощью нуклеофильной атаки на незамещенный атом углерода азинов и нитроаренов. Рассмотрены тандемы реакций нуклеофильного присоединения AN-AN, нуклеофильного присоединения-замещения AN-S(ipso)N, нуклеофильного замещения S(H)N-S(ipso)N и S(H)N-S(H)N, протекающих между азинами и бинуклеофилами; внутримолекулярные S(H)N-реакции в ряду азинов и нитроаренов, а также другие методы синтеза конденсированных гетероциклов, основанные на процессах нуклеофильного замещения типа S(H)N
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2.

Вид документа : Статья из сборника (однотомник)
Шифр издания : 24/Т 42
Автор(ы) : Привар Ю. О., Братская С. Ю., Азарова Ю. А., Нестеров Д. В., Малахова И. А., Иванников С. И., Пестов А. В.
Заглавие : Тиокарбамоилированные производные полиаминов для сорбционного извлечения золота, серебра и ртути из растворов тиосульфатного выщелачивания
Место публикации : Природные опасности, современные экологические риски и устойчивость экосистем: VII Дружининские чтения: материалы Всероссийской научной конференции с международным участием. - Хабаровск: ОмегаПресс, 2018. - С. 75-79
ББК : 24
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: We have suggested a one-step method for the synthesis of thi-ocarbamoyl derivatives of polyallylamine (TСPAA) and polyaminostyrene (TСPAS) in the eutectic melt thiourea/ammonium thiocyanate, that is more safe and simple in comparison with the known method of functionalization using carbon disulfide. The resulting derivatives are insoluble and can be used as sor-bents without additional cross-linking. Sorption properties of TCPAA and TCPAS toward gold, silver and mercury ions have been studied in solutions of ammonia-thiosulfate leaching of gold and silver-containing sludge of Chalgan experimental workshop, which are also contaminated with mercury. It was shown that both TCPAA and TCPAS are efficient sorbents for silver, while ef-fective recovery of gold and mercury is achieved only with low- and medium-substituted TCPAA.
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3.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Лосева Н. В., Эдилова, Юлия Олеговна, Салоутин, Виктор Иванович, Бажин, Денис Назарович, Абржина, Лариса Леонидовна
Заглавие : Синтез енаминокетонов на основе фторсодержащих алкоксиенонов
Место публикации : Система управления экологической безопасностью : сборник трудов XVII международной научно-практической конференции, посвященный различным теоретическим и практическим аспектам экологической безопасности. - Екатеринбург, 2023. - С. 237-243
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 1,3-Diketenes are promising polyfunctional building blocks that can be used to obtain complex aliphatic, aromatic, and heterocyclic structures. The presence of fluorinated carbon radicals in the alkoxyenone molecule significantly affects its properties and reactivity, which makes it possible to use these substances in the development of green chemistry and increases the environmental safety of synthesis processes.
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4.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Андрейков Е. И., Кабак, Александр Сергеевич, Бейлина Н. Ю., Мишкин С. И.
Заглавие : Исследование рециклинга углеродных волокон путем термического сольволиза полимерных композиционных материалов с применением каменноугольного пека
Место публикации : Химия в интересах устойчивого развития. - 2018. - Т. 26, № 6. - С. 571-576
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): рециклинг углеродных волокон--термический сольволиз--полимерные композиционные материалы--каменноугольный пек--coal tar pitch--recycling--carbon fibres--thermal solvolysis--fibre-reinforced polymers
Аннотация: Исследован процесс рециклинга углеродных волокон (УВ) путем термического сольволиза полимерных композиционных материалов в среде каменноугольного пека в интервале температур 320-400 °С. Изучено влияние термообработки в среде каменноугольного пека на свойства выделенных рециклингом УВ. Представлены результаты исследования методом растровой электронной микроскопии и механических испытаний выделенных УВ в сравнении с исходными УВ, используемыми для создания полимерных композиционных материалов.
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5.

Вид документа : Статья из журнала
Шифр издания : 54/W 20
Автор(ы) : Rusinova O. V., Rusinov V. L., Syngaevskii E.D., Bochek L.I., Lapina M.I., Vasyuta Yu. V.
Заглавие : Wall Rock Metasomatism and Formation Conditions of the Silver-Polymetallic Bol'shoi Kanimansur Deposit (Tadjikistan)
Место публикации : Geology of Ore Deposits. - 2001. - Vol. 43, № 5. - С. 386-405
Примечания : Bibliogr. : p. 405 (20 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Products of the hydrothermal alteration of rocks and vertical zonality at the Kanimansur silver-polymetallic deposit (Tadjikistan) have been studied. On the basis of these studies, physicocochemical conditions of metasomatism and ore formation were reviewed. Condensed carbonaceous matter in wall rock metasomatites and ores were found and carbon isotopic composition of this carbonaceous matter and composition of gases in open pores in rocks of the deposit were analyzed. As a result of geological observations, analysis of mineral parageneses, compositions of minerals, and chemistry of wall rock alteration, the following four stages of the hydrothermal process were distinguished: autometasomatic, propylitic, preore chlorite-sericite, and synore. Mineral geothermometers were used to estimate the temperatures of metasomatism, which varied within the range 200-250°C for all stages except for the autometasomatic stage (450-500°C). The formation of unhydrated light micas, quartz, and highly ferruginuous chlorites was related to acid preore metasomatism. The stability of these chlorites testifies to a slight increase in the acidity of solutions during the preore stage (pH not less than 3.5). The wall rock metasomatites and sulfide ores are characterized by a relatively rare occurrence of pyrite due to a low activity of the sulfide sulfur during hydrothermal alterations (logaS2 = -7...-10). The low activity of the sulfide sulfur is confirmed by the fact that iron is tied in a highly ferruginuous chlorite. At upper ore levels, even zinc is tied in chlorite. This testifies to a much greater aS2 /aO2 value. Judging by the participation of carbonaceous matter in the process, ore components were deposited due to a local increase in the alkalinity at the ore-forming stage and oxidation of reduced fluids. The established features of metasomatic transformations, are related to particulars of the regional magmatism.????
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6.

Вид документа : Статья из журнала
Шифр издания : 54/W 20
Автор(ы) : Rusinova O. V., Rusinov V. L., Abramov S. S., Kuznetsova S. V., Vasyuta Yu. V.
Заглавие : Wall Rock Alterations and Physicochemical Conditions of the Sovetsk Gold Deposit Formation (Enisei Ridge)
Место публикации : Geology of Ore Deposits. - 1999. - Vol. 41, № 4. - С. 276-294
Примечания : Bibliogr. : p. 294 (24 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The mode of distribution of carbonaceous matter (CM) and specific characteristics of the metasomatic zonation were studied, as well as physicochemical conditions of the ore deposition and wall rock alteration at the Sovetsk gold deposit. The deposit relates to the quartz vein low-sulfide type and is hosted by carbonaceous rock sequences ("black shales") within a wide shear zone. This shear zone spreads along the regional Ishimbin strike-slip deep fault. The Proterozoic Tatarsk-Ayakhtin granitic complex, intruding the ore bearing rocks, composes the core of the ore district. Granites compose a pluton roof, where Olimpiada and Veduga gold deposits occur, and in contact zones the Eldorado and Pereval'ninsk deposits are located. The Sovetsk deposit is situated farther from the pluton contacts. The rocks of the ore-bearing sequence are metamorphosed in the chlorite-muscovite greenschists facies. A specific feature of wall rock alteration is unclear lateral metasomatic zonation with gradual transition between zones and alternating bands of strong and weak alterations. The main metasomatic minerals are muscovite and chlorite. Quartz and carbonate are subordinate, and ilmenite, rutile, monoclinic, and hexagonal pyrrhotites are accessories. Above ore bodies turmaline is rather common, but inside and below ore bodies albite occurs. The distribution and zonation of metasomatic parageneses allow us to call this kind of wall rock alteration as "disseminated metasomatism." The rock alteration developed sinchroneously with dynamic metamorphism in the strongly anisotropic sheared rocks. The absence or low intensity of acidic metasomatism is an important feature of the deposit. The temperature of metamorphism was 500-460°C, of wall rock alteration - 460-350°C, and of ore deposition (from early to late stages) from 380 to 150°C. The disseminated CM was metamorphosed to the low graphitic stage, and the condensed CM in veinlets corresponds to the late antracitic stage. The fugacity of oxygen and sulfur in the fluids was estimated with ilmenite = rutile + pyrrhotite equilibrium, composition of pyrrhotite and chlorite. The oxygen fugacity was lower than that of the ilmenite-magnetite buffer, and sulfur fugacity was lower than that of the pyrite-pyrhothite buffer. Nearer to the ore bodies the sulfur fugaeity increases, and inside ore bodies it corresponds to the pyrite + pyrrhotite paragenesis. The calculations of the oxygen fugacity with the gas composition in the system C-O-H suggests that the ratios CO2/CH4/H2O are close to the QFM and ilmenite-magnetite buffers and similar to that received with some mineral fugometers. Hydrocarbons with 2-4 carbon atoms appear not to be in equilibrium with CO2. The variation intervals of pH, fo2 and (before the ore deposition) of T are rather narrow. The pressure under metamorphism exceeded 1.9 kbar, but it decreased to the beginning of ore deposition to 0.7 kbar. This means that ores were deposited in an extension environment.
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7.

Вид документа : Статья из журнала
Шифр издания : 24/T 60
Автор(ы) : Zakharova G. S., Fattakhova Z. A., Ottmann A., Moller L., Thauer E., Klingeler R., Andreikov E. I., Puzyrev I. S., Zhu Q.
Заглавие : TIO2/C nanocomposites prepared by thermal annealing of titanium glycerolate as anode materials for lithium-ion batteries
Место публикации : Journal of materials science. - 2018. - Vol. 53, № 17. - С. 12244-12253
ББК : 24
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: TiO2/C nanocomposites have been synthesized by developing a facile route based on the annealing of titanium glycerolate in inert atmosphere at 250–850 °C. X-ray diffraction studies reveal that the annealing temperature determines the crystal structure of the TiO2 phase in the compounds, which can be amorphous, anatase, and rutile. In contrast, the nanosized rod-like morphology which to a certain extent is predefined by the titanium glycerolate precursor does not depend on the annealing temperature. The carbon content of the TiO2/C composites amounts to 16–29 wt% and shows up, e.g., in the characteristic Raman D and G bands. Anatase-structured TiO2/C, which is obtained at 600 °C, exhibits the best electrochemical performance among the studied materials. Without the addition of carbon black, it reaches an initial specific discharge capacity of 378 mA h g−1 at 100 mA g−1 and exhibits excellent rate capability with a capacity of 186 mA h g−1 at 1000 mA g−1.
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8.

Вид документа :
Шифр издания : 54/T 44
Автор(ы) : Neudachina L.K., Golub A. Y., Gorbunova E. M., Yatluk Yu. G.
Заглавие : Thermal stability of new sorption materials based on polysiloxanes
Место публикации : Glass Physics and Chemistry. - 2011. - Vol.37, №6. - С. 603-612
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): thermal stability --thiocarbamoylated polysiloxanes --siloxane matrix
Аннотация: The thermal stability of the unmodified, aminated, and thiocarbamoylated polysiloxanes has been studied. The siloxane matrix is stable in the temperature range up to 800°C. For the first time, mass spectrometry has been applied to the analysis of the composition of the gaseous products of thermal decomposition of the studied polysiloxanes. It has been shown that, in the process of thermal decomposition, the terminal functional groups are detached and oxidized. Water, ammonia, nitrogen, carbon, and sulfur (in the case of thiourea-modified sorbent) oxides are formed predominantly. The quantitative removal of functional groups during heating up to 800°C has been confirmed by IR spectroscopy. A mechanism of thermal decomposition of polysiloxane xerogels has been proposed. It has been found that adsorption of platinum increases the thermal stability of the samples
\\\\Expert2\\nbo\\Glass Physics and Chemistry\\2011, V. 37, N 6, P.603-612.pdf
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9.

Вид документа : Статья из журнала
Шифр издания : 54/T 44
Автор(ы) : Chupakhin O. N., Rusinov G. L., Itsikson N. A., Beresnev D. G., Nikolaeva I. L., Burilov A. R., Konovalov A. I.
Заглавие : The first case of direct coupling of heterocycles with calixarenes. Reaction of resorcinarenes with 1,2,4-triazin-5(2H)-ones
Место публикации : Heterocyclic Communications. - 2004. - Vol. 10, № 1. - С. 15-18: ил.
Примечания : Библиогр.: с. 18 (8 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A convenient method for an one-step coupling of resorcinarenes with 3-R-1,2,4-triazin-5(2H)-ones, involving nucleophilic addition to the unsubstituted carbon atom C-6 of triazine ring, has been worked out.
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10.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Filyakova V. I., Slepukhin P. A., Boltacheva N. S., Letova E. B., Charushin V. N.
Заглавие : Synthesis of podands modified with thiosemicarbazide and fluoroalkyl(hydroxy)pyrazoline fragments
Место публикации : Russian Journal of General Chemistry. - 2017. - Vol. 87, № 5. - С. 957-962
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): podandes--x-ray diffraction analysis --acetic acid--organic acids
Аннотация: 1,8-Bis(diisothiosemicarbazido)-3,6-dioxaoctane have been synthesized by subsequent treatment of 2,2 -(ethylenedioxy)bisethylamine with carbon disulfide, sodium chloroacetate, and hydrazine hydrate. 1,8-Bis- (diisothiosemicarbazido)-3,6-dioxaoctane has reacted with lithium 1,1-difluoropenta-2,4-dionate in glacial acetic acid to yield 1,8-bis[5R*,5 R*(5-hydroxy-5-difluoromethyl-4,5-dihydro-3-methyl-1H-pyrazol-1-yl)-1-carbothioamido]-3,6-dioxaoctane. The molecular and crystal structure of the product has been determined by X-ray diffraction analysis.
\\\\Expert2\\NBO\\Russian Journal of General Chemistry\\2017 V 87 P957.pdf
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11.

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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12.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Ol'shevskaya V. A., Ayuob R., Brechko Z. G., Petrovskii P. V., Levit G. L., Krasnov V. P., Charushin V. N., Chupakhin O. N., Kalinin V. N.
Заглавие : Synthesis of carborane analogues of gamma-aminobutanoic acid
Место публикации : Journal of Organometallic Chemistry. - 2005. - Vol. 690, № 11. - С. 2761-2765
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: General method for preparation of high yields of novel N-protected carborane amino acid derivatives, 3-acylamino-1-carboxymethyl-2-R-o-carboranes (R = H, Me, Ph), is reported. The synthesis starts from readily available 3-amino-o-carboranes and includes the protection of amino group, introduction of carboxymethyl function to the carbon atom of polyhedron via the metallation of carborane CH bond with sodium amide in liquid ammonia, and treatment of corresponding sodium carboranes with sodium bromoacetate. Deprotection of N-acylated carborane amino acids is studied in acidic media. Depending on the procedure employed, closo- or nido-carborane amino acids were obtained
\\\\Expert2\\nbo\\Journal of Organometallic Chemistry\\2005, v. 690, p.2761.pdf
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13.

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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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chupakhin O. N., Musikhina A. A, Utepova I. A., Charushin V. N., Rempel A. A., Pryakhina V. I., Zyryanova E. Y., Pershina S. V., Yolshina L. A., Vovkotrub E. G.
Заглавие : Synthesis and properties of azines functionalized graphene with extremely high adsorptive ability to Eu3+ ions
Место публикации : Flatchem. - 2022. - Vol. 33. - С. 100348
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: In this work, a versatile synthetic protocol for obtaining of new promising carbon materials based on the C–C coupling of graphenide lithium species with azaaromatic compounds (1,10-phenanthroline, phenyl-1,2,5-oxadiazolo[3,4-b]pyrazine) has been suggested. It was shown that more electrophilic oxadiazolopyrazine gave the product with high degree of graphene functionalization and demonstrated non-isomorphic properties. At the same time, phenanthrolinyl graphene has less functionalization degree due to a lower electrophilicity of azine. However, the large size of pores between organic residues in phenanthrolinyl graphene allows adsorbing almost 10% of Eu3+. The mesurment of adsorption isotherm showed an extremely high affinity of phenanthrolinylgraphene to Eu (III) ions in netural or alkaline conditions, and the obtained hybrid material could work at least 5 sorption/desorption cycles. The structures of azine-graphene dyads were verified by complex of modern physicochemical analyses methods (the Raman spectroscopy, FTIR, XPS, SEM, EDS and TGA analyses).
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Murashkevich A. N., Alisienok O. A., Novik E. S., Titova Y. A., Fedorova O. V., Rusinov G. L., Charushin V. N.
Заглавие : Synthesis and physicochemical and catalytic properties of composites in the Sio2–Zro2 system
Место публикации : Inorganic materials. - 2020. - Vol. 56, № 4. - С. 430-436
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): acid-base properties--catalysis--composite--silica--specific surface area--zirconia
Аннотация: Using coprecipitation, a sol–sol method, and molecular layering, we have synthesized SiO2–ZrO2 composites with SiO2 : ZrO2 ratios from 1 : 1 to 9 : 1 and a large specific surface area, which increases with growth silicon-containing component concentration. Using adsorption of Hammett indicators, we have assessed the concentration of acid–base centers in the pK range 1.3–9.6, which has been shown to vary from 68 to 160 μmol/g. Elemental analysis and IR spectroscopy data have demonstrated the presence of not only water but also nitrate ions and carbon dioxide on the surface of the samples. It has been shown that the use of nanoparticulate SiO2–ZrO2 oxides as heterogeneous catalysts—promoters for (2S,4R)-4-hydroxyprolyl-(S)-1-phenylethylamine trifluoroacetate, a chiral inducer in the asymmetric Biginelli reaction, makes it possible to raise ee (enantiomeric excess) from 39 to 68% and the reaction yield from 29 to 55%.
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16.

Вид документа :
Шифр издания : 54/S 98
Автор(ы) : Gorbunova T. I., Bazhin D. N., Zapevalov A. Ya., Saloutin V. I.
Заглавие : Synthesis and inhibiting capacity of new fluorine-containing quaternary ammonium salts
Место публикации : Russian Journal of Applied Chemistry. - 2011. - Vol.84, №6. - С. 972-977
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): synthesis--inhibiting capacity --ammonium salts
Аннотация: New fluorine-containing quaternary ammonium salts exhibiting a high inhibiting capacity against hydrochloric acid corrosion of low-carbon steels were synthesized. The polarization resistance method was used to determine the uniform-corrosion rates of steel-3 and steel-35 in relation to the structure of fluorine-containing moieties of quaternary ammonium salts and their concentration
\\\\Expert2\\nbo\\Russian Journal of Applied Chemistry\\2011, v. 84, N 6, p.972.pdf
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ivoilova A. V., Malakhova N. A., Mozharovskaia P. N., Nikiforova A., Kozitsina A., Ivanova A., Rusinov V. L., Tumashov A. A.
Заглавие : Study of different carbonaceous materials as modifiers of screen-printed carbon electrodes for the triazid as potential antiviral drug
Место публикации : Electroanalysis. - 2022. - Vol. 34, № 11. - С. 1745-1755
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: In this work a comparative study of Screen-Printed Carbon Electrodes (SPCE) – bare and modified by drop casting with carbonaceous nanomaterials (CNMs) as Multi Walled Carbon Nanotubes (MWCNT), Carbon Black and Functionalized Carbon Black for voltammetric determination of 5-methyl-6-nitro-7-oxo-4,7-dihydro-1,2,4-triazolo[1,5-a]pyrimidinide l-arginine monohydrate (Triazid) as a potential drug with a broad spectrum of antiviral activity is reported. Bare SPCE and CNMs modified SPCE (SPCE/CNMs) have been characterized morphologically by SEM and electrochemically by cyclic voltammetry/electrochemical impedance spectroscopy with [Fe(CN)6]4−/3− as redox probe. Significant improvement of electrochemical performances is achieved with SPCE/CNMs compared with the bare SPCE. Among SPCE/CNMs studied SPCE modified with MWCNT (SPCE/CNT) is characterized by the best combination of electrochemical properties and electroanalytical performance towards TD. The linear dynamic range is 25–200 mg L−1 (R2=0.9975) with the limit of detection – 2.8 mg L−1 Triazid using SPCE/CNT and Square-Wave Voltammetry technique. The developed sensor was successfully used for Triazid determination in the Pharmaceutical Substance “TRIAZID”. The results achieved with SPCE/CNMs after chemical binding of dissolved oxygen in 0.04 M Britton-Robinson buffer+0.04 M Na2SO3 (pH 7.2±0.2) are very useful for further development of cost-effective and time-consuming pharmaceutical routine assay.
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18.

Вид документа : Статья из журнала
Шифр издания : 54/S 73
Автор(ы) : Sosnovskikh V. Ya., Usachev B. I., Kodess M. I.
Заглавие : 2-Polyfluoroalkylchromones. 12. Nitration of 5,7-dimethyl-2-polyhaloalkylchromones and complete assignment of signals in the 1H and 13C NMR spectra of 5,7-dimethyl-2-trifluoromethylchromone and its mono- and dinitro derivatives [Electronic resource]
Место публикации : Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2002. - Vol. 51, № 10. - С. 1817-1828
Систем. требования: http://www.springerlink.com/content/j5142173317h7g17/fulltext.pdf
Примечания : 27.10.2011 г.
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The nitration of 5,7-dimethyl-2-polyhaloalkylchromones affords either 5,7-dimethyl-6-nitro- or 5,7-dimethyl-6,8-dinitro-2-polyhaloalkylchromones, depending on the reaction conditions. Signals in the 1H and 13C NMR spectra of the sterically hindered chromones were completely assigned using the 2D NOESY, HETCOR, and COLOC spectra. The influence of nonplanar nitro groups on chemical shifts of carbon atoms was studied. Some spectral peculiarities of the peri-methyl group were revealed. The 1H-1H and 13C-1H spin-spin coupling constants, including the extreme six-bond long-range coupling between the protons of the Me(5) group and H(8), were determined
\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2002, 51 (10), 1817.pdf
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19.

Вид документа : Статья из журнала
Шифр издания : 54/R 95
Автор(ы) : Rusinova O. V., Rusinov V. L.
Заглавие : Metasomatism in the Muruntau ore field (Western Uzbekistan)
Место публикации : Geology of Ore Deposits. - 2003. - Vol. 45, № 1. - С. 66-85
Примечания : Bibliogr. : p. 85 (34 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The formation of the giant Muruntau gold-quartz deposit and ore field (western Uzbekistan) is defined as a prolonged (70 Ma) multiphase geological process related to shear tension and ductile deformations of rocks. The history of the ore field development is very complicated, and there is still much to be learned about it. We studied the conditions, zonation, and deformations of the metasomatism-related ore formation, as well as the behavior of carbonaceous matter (CM) in this process. Lower Paleozoic sheared carbonaceous host rocks are regionally metamorphosed in the muscovite-chlorite subfacies. This process, which evolved over a long time (C3-P1), started with the increase in temperature (the progressive megastage) and continued during its decrease when the bulk of gold was deposited. The beginning of the process was associated with ductile deformations that showed up in folding and shearing of rocks. At that time, pre-ore magnesium-potassium metasomatism took place in the temperature interval of 400-600°C. During the regressive megastage, calcium metasomatism occurred and skarn assemblages (actinolite, clinozoisite, diopside, and garnet) were deposited at T = 400-520°C. Later, ductile deformations were replaced by brittle deformations, and quartz-ore veinlets and lenses formed together with locally developed vein-related orthoclase-chlorite, albite-carbonate, sericite-tourmaline, and quartz-adular metasomatites. The metasomatic zonation showed up at early stages and was oriented along the direction of fluid filtration. The outer (front) zone is represented by a dome of biotitized rocks. Banded biotite-feldspar-quartz metasomatites occur within them. Their back (inner) zones are composed of the biotite-orthoclase-quartz assemblage. Younger skarn assemblages make up series of thin bands within biotite-feldspar-quartz metasomatites. Ore veinlets are enclosed within this metasomatic halo. CM took an active part in the hydrothermal process: it was output from metasomatic zones and redeposited along their outer boundary. CM interacted with the hydrothermal solution and maintained the reducing medium at the level of a QFM buffer. Temperatures established by the carbon isotope thermometer (CM + carbonate) are similar to values of mineral geothermometers (250-350°C during ore deposition). The distinctive features of metasomatism in the Muruntau ore field, hosted by carbonaceous sequences and shear zones, are the absence of vein-related zonation and a poor vertical zonation (a low T gradient), suppressed acid metasomatism, and the lack of an obvious relationship between ore mineralization and a particular magmatism.????
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20.

Вид документа : Статья из журнала
Шифр издания : Г/R 32
Автор(ы) : Ivoilova A. V., Tsmokalyuk A. N., Mozharovskaia P., Kozitsina A. N., Ivanova A. V., Rusinov V. L., Mikhalchenko L. V., Leonova M., Lalov A.
Заглавие : Redox conversions of 5-methyl-6-nitro-7-oxo-4,7-dihydro-1,2,4triazolo[1,5-a]pyrimidinide l-arginine monohydrate as a promising antiviral drug
Место публикации : Molecules. - 2021. - Т. 26, № 16. - Ст.5087
ББК : Г
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): nitro-1,2,4-triazolo[1,5a]pyrimidines--triazid--nitro group transformations--nitroaromatic compounds
Аннотация: This article presents the results of a study of electrochemical transformations in aqueous and aprotic media of 5-methyl-6-nitro-7-oxo-4,7-dihydro-1,2,4-triazolo[1,5-a]pyrimidinide l-arginine monohydrate (1a, Triazid) obtained by electrochemical methods and ESR spectroscopy. The effect of pH on the current and the reduction potential of 1a in an aqueous Britton–Robinson buffer solution was studied. It was found that 1a is irreversibly reduced in aqueous acidic media on a glassy carbon electrode in one stage with the participation of six electrons and the formation of 5-methyl-6-amino-7-oxo-1,2,4-triazolo[1,5-a]pyrimidin. The electroreduction of 1a in DMF on a background of tetrabutylammonium salts proceeds in two stages, controlled by the kinetics of second-order reactions. In the first stage, the reduction of 1a is accompanied by protonation by the initial compound of the basic intermediate products formed in the electrode reaction (self-protonation mechanism). The second quasi-reversible stage of the electroreduction 1a corresponds to the formation of a dianion radical upon the reduction of the heterocyclic anion 5-methyl-6-nitro-7-oxo-4,7-dihydro-1,2,4-triazolo[1,5-a]pyrimidin, which is formed upon the potentials of the first peak. The ESR spectrum of the radical dianion was recorded upon electroreduction of Triazid in the presence of Bu4NOH. The effect of the formation of ion pairs on the reversibility of the second peak of the 1a transformation is shown. A change in the rate and regioselectivity of the protonation of the dianion radical in the presence of Na+ and Li+ ions is assumed. The results of studying the electroreduction of 1a by ESR spectroscopy with a TEMPO trap make it possible to assume the simultaneous formation of both a nitroxyl radical and a radical with the spin density localized on the nitrogen at the 4 position of the six-membered ring
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