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1.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Verbitskiy E. V., Kvashnin Y. A., Zhilina E. F., Shchepochkin A. V., Rusinov G. L., Chupakhin O. N., Charushin V. N., Baranova A. A., Khokhlov K. O., Chuvashov R. D., Schapov I. E., Yakovleva Y. A., Makarova N. I., Vetrova E. V., Metelitsa A. V.
Заглавие : Synthesis and characterization of linear 1,4-diazine-triphenylamine–based selective chemosensors for recognition of nitroaromatic compounds and aliphatic amines
Место публикации : Dyes and pigments. - 2020. - Vol. 178. - С. 108344
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): aliphatic amines--fluorescence quenching--nitroaromatic compounds--pyrazine--quinoxaline--solvatochromism
Аннотация: Novel 1,4-diazine-based dyes of the D–π–A type, possessing triphenylamine as an electron-donating group, have been developed. Fluorescence studies have demonstrated that emission of these fluorophores is sensitive towards different nitroaromatic compounds and aliphatic amines, both in solutions and in a vapor phase. Moreover, these compounds can be considered as “naked-eye” fluorescent probes for solution polarity because they possess pronounced solvatochromic properties. Therefore, these compounds have to be regarded as potential multifunctional chemosensors for monitoring hazardous organic substances.
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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Verbitskiy E. V., Rusinov G. L., Chupakhin O. N., Charushin V. N.
Заглавие : Design of fluorescent sensors based on azaheterocyclic push-pull systems towards nitroaromatic explosives and related compounds: a review
Место публикации : Dyes and pigments. - 2020. - Vol. 180. - С. 108414
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): nitroaromatic explosives--fluorescence quenching--pyridines--pyrazine--pyrimidines--triazines
Аннотация: Highly sensitive and selective detection of nitro containing high energy organic compounds such as picric acid (PA), 2,4,6-trinitrotoluene (TNT) and 2,4-dinitrotoluene (DNT) has become a challenging task due to concerns over national security, criminal investigations and environment protections. Among various known detection methods, fluorescence sensors have gained special attention in recent time. The family of fluorescent sensors based on push-pull systems that incorporate nitrogen heterocycles as an electron-withdrawing group have a growing interest due to their high sensitivity, selectivity and easy tuning. The fluorescent sensors discussed in this review are classified and organized according to used azaheterocyclic scaffold, their functionality and their ability to detect of nitroaromatics by fluorescence quenching.
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3.

Вид документа : Статья из журнала
Шифр издания : 54
Автор(ы) : Charushin V. N., Sorokin N. N., Chernyshev A. I., Baklykov V. G., Ponizovskii M. G., Chupakhin O. N.
Заглавие : 1H and 13C NMR spectra of tetrahydroquinoxalines condensed with six-membered heterocycles [Электронный ресурс]
Место публикации : Magnetic Resonance in Chemistry. - 1986. - Vol. 24, № 9. - С. 777-782
Систем. требования: http://onlinelibrary.wiley.com/doi/10.1002/mrc.1260240909
Примечания : Bibliogr. : p. 782 (16 ref.). - 26.10.15
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): 1h nmr--13c nmr--condensed tetrahydroquinoxalines
Аннотация: The 1H and 13C NMR spectra of tetrahydroquinoxalines condensed with pyridazine, pyrazine, oxazine, oxadiazine, thiadiazine or triazine rings have been measured in DMSO-d6 solution. The effects of six-membered heterocycles on 1H and 13C chemical shifts and the values of one-bond 1J(CH) and vicinal 3J(HH) coupling constants for the ring junction fragment are considered. The differences between the 1H and 13C spectral parameters of tetrahydroquinoxalines annelated with five- or six-membered heterocycles with the same set of heteroatoms attached to the ring junction carbons are also discussed.
\\\\expert2\\nbo\\Magnetic Resonance in Chemistry\\1986, v.24, N 9, p.777.pdf
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4.

Вид документа : Статья из журнала
Шифр издания : 54/Q 32
Автор(ы) : Chupakhin O. N., Charushin V. N., Chernyshev A. I., Esipov S. E.
Заглавие : Quaternization of pyrido[2,3-b]pyrazines: 1H and 13C NMR Study [Электронный ресурс]
Место публикации : Magnetic Resonance in Chemistry. - 1985. - Vol. 23, № 6. - С. 437-441
Систем. требования: http://onlinelibrary.wiley.com/doi/10.1002/mrc.1260230607
Примечания : Bibliogr. : p. 441 (20 ref.). - 26.10.15
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): n-methylpyrido[2,3-b]pyrazinium salts--pyrido[2,3-b]pyrazines
Аннотация: The structure of N-methylpyrido[2,3-b]pyrazinium salts has been examined by 1H and 13C NMR. 6-Dimethylamino- and 6-morpholino-pyrido[2,3-b]pyrazines were shown to undergo quaternization by methyl iodide at N-4 of the pyrazine ring, whereas the pyridine ring N-5 was the N-alkylation site in the reaction of unsubstituted pyrido[2,3-b]pyrazine with methyl iodide under the same conditions. The effects of quaternization on the 1H and 13C chemical shifts and the nJ(CH) values are discussed.
\\\\expert2\\nbo\\Magnetic Resonance in Chemistry\\1985, v.23, N 6, p.437.pdf
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5.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Verbitskiy E. V., Rusinov G. L., Chupakhin O. N., Charushin V. N.
Заглавие : Azaheterocyclic push-pull chromophores: synthesis, photophysical properties and applications as fluorescent sensors
Место публикации : Actual problems of organic chemistry and biotechnology. - Екатеринбург, 2020. - С. 73-75
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): pyrimidine--pyrazine--fluorescence quenching--push-pull fluorophores
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6.

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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7.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Charushin V. N., Chupakhin O. N., Postovskii I. Ya.
Заглавие : Reaction of pyrido [2,3-b]pyrazine salts with nucleophiles
Место публикации : Chemistry of Heterocyclic Compounds. - 1976. - Vol. 12, № 8. - С. 948
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
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8.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Verbitskiy E. V., Kvashnin Y. A., Rusinov G. L., Charushin V. N., Le Poul P., Achelle S., Bures F., Barsella A.
Заглавие : Push–pull derivatives based on 2,4'-biphenylene linker with quinoxaline, [1,2,5]oxadiazolo[3,4-b]pyrazine and [1,2,5]thiadiazolo[3,4-b]pyrazine electron withdrawing parts
Место публикации : Molecules. - 2022. - Vol. 27, № 13. - Ст.4250
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A series of novel V-shaped quinoxaline, [1,2,5]oxadiazolo[3,4-b]pyrazine and [1,2,5]thiadiazolo[3,4-b]pyrazine push–pull derivatives with 2,4′-biphenylene linker were designed and their electrochemical, photophysical and nonlinear optical properties were investigated. [1,2,5]Oxadiazolo[3,4-b]pyrazine is the stronger electron-withdrawing fragment as shown by electrochemical, and photophysical data. All compounds are emissive in a solid-state (from the cyan to red region of the spectrum) and quinoxaline derivatives are emissions in DCM solution. It has been found that quinoxaline derivatives demonstrate important solvatochromism and extra-large Stokes shifts, characteristic of twisted intramolecular charge transfer excited state as well as aggregation induced emission. The experimental conclusions have been justified by theoretical (TD-)DFT calculations.
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9.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kvashnin Yu. A., Verbitskiy E. V., Rusinov G. L., Charushin V. N.
Заглавие : Modification and application of 1,2,5-oxadiazolo[3,4-b]pyrazine derivatives: highlights and perspectives
Место публикации : Russian chemical bulletin. - 2022. - Vol. 71, № 7. - С. 1342-1362
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
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10.

Вид документа : Статья из журнала
Шифр издания : 54/C 98
Автор(ы) : Sosonkin I. M., Kalb G. L. , Kazantseva I. V., Ponizovskii M. G., Charushin V. N., Chupakhin O. N.
Заглавие : Cyclization of N-alkylazinium cations with bifunctional nucleophiles. 23. Electrochemical criteria for electrophilicity in 1,4-diazinium cations and their participation in cyclizations with acetoacetamide [Электронный ресурс]
Место публикации : Chemistry of Heterocyclic Compounds. - 1987. - Vol. 23, № 8. - С. 888-895
Систем. требования: http://link.springer.com/article/10.1007/BF00473468
Примечания : Bibliogr. : p. 894-895 (22 ref.). - 22.10.15
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): pyrazinium--quinoxalinium--benzoquinoxalinium
Аннотация: The polarographic reduction potentials E1/2 of the pyrazinium, quinoxalinium, benzoquinoxalinium, pyrido[2,3-b]pyrazinium, and pteridinium cations were determined. Annellation of a benzene ring increases the electrophilicity of the diazinium cations to a greater degree than the introduction of such electron acceptors as aza, aminocarbonyl, or methoxycarbonyl groups. The boundary between the active and inactive 1,4-diazinium salts was determined; cations with E1/2 values more negative than −0.50 V do not form either stable covalent adducts or cyclic diadducts through annellation of the dinucleophiles to the pyrazine ring.
\\\\expert2\\nbo\\Chemistry of Heterocyclic Compounds\\1987, v.23, N 8, p. 888.pdf
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