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1.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kovalev I. S., Sadieva L. K., Taniya O. S., Yurk V. M., Minin A. S., Kopchuk D. S., Zyryanov G. V., Ulomsky E. N., Rusinov V. L., Charushin V. N., Chupakhin O. N.
Заглавие : Pyrene-based lipophilic/biphilic chemosensors for the fluorescence "turn-off" detection of nitroanalytes in aqueous media
Место публикации : AIP Conference Proceedings. - 2021. - Vol. 2388, № 1. - Ст.030015
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Two approaches towards “turn off” fluorescence detection of nitroanalytes (dinitro-ortho-cresol (DNOC), 2,4,6-trinitrotoluene (TNT) and Riamilovir (Triazavirin ®) are reported such as by tuning the chemosensors structure or by changing the environment. In both cases the great response was achieved with Stern-Volmer quenching constants (KSV) as high as 2.28–3.14 × 104 M−1 (for structure modification approach) and 4.67 × 105 M−1 (for changing of environment approach).
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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Taniya O. S., Kopchuk D. S., Khasanov A. F., Kovalev I. S., Santra S., Zyryanov G. V., Charushin V. N., Chupakhin O. N., Majee A.
Заглавие : Synthetic approaches and supramolecular properties of 2,2′:N′,M″-terpyridine domains (N = 3,4,5,6; M = 2,3,4) based on the 2,2'-bipyridine core as ligands with k2n-bidentate coordination mode
Место публикации : Coordination Chemistry Reviews. - 2021. - Vol. 442. - Ст.213980
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
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3.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kovalev I. S., Sadieva L. K., Taniya O. S., Yurk V. M., Minin A. S., Kopchuk D. S., Zyryanov G. V., Charushin V. N., Chupakhin O. N.
Заглавие : Bispyrenylalkane chemosensor for the naked-eye detection of nitro-explosives
Место публикации : Chimica Techno Acta. - 2021. - Vol. 8, № 2. - С. 20218209
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): detection of explosives in aqueous media--chemical sensors--fluorescence quenching--pyrene-based fluorophores
Аннотация: Pyrene-based compounds have a great potential as fluorescent chemosensors for various analytes including common nitroexplosives, such as 2,4,6-trinitrotoluene (TNT). Compounds having two pyrene units in one molecule, such as bispyrenylalkanes, are able to form stable, bright emissive in a visual wavelength region excimers both in non-polar and polar environments. In this work we wish to report that in non-polar solvents the excimer has poor chemosensing properties while in aqueous solutions it provides significant “turn-off” fluorescence response to TNT in the subnanomolar concentrations.
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4.

Вид документа : Статья из журнала
Шифр издания : Г/A 99
Автор(ы) : Taniya O. S., Khasanov A. F., Varaksin M. V., Starnovskaya E. S., Krinochkin A. P., Savchuk M. I., Kopchuk D. S., Kovalev I. S., Nosova E. V., Zyryanov G. V., Chupakhin O. N., Kim G. A.
Заглавие : Azapyrene-based fluorophores: synthesis and photophysical properties
Место публикации : New Journal of Chemistry. - 2021. - Vol. 45, № 45. - С. 20955-20971
ББК : Г
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Azapyrenes are the nitrogen isosteres of pyrene. Based on theoretical and experimental studies, electron–acceptor azapyrene domains may be considered as convenient scaffolds for constructing a large variety of “push–pull” π-conjugated chromophores with pronounced ICT properties. Over the past decade, due to the unrelenting interest in functional materials and modern methodologies such as cross-coupling, peri-annulation, direct C–H-functionalization, etc., methods for the synthesis of aryl(alkyl) K-functionalized azapyrenes and other derivatives have been developed, and their photophysical and electrochemical properties have been studied. This short review aims at critical analysis of the best known/modern methods for the preparation of functionalized azapyrene derivatives, as well as an assessment of their photophysical/electrochemical properties in comparison with the structural and electronic properties of the parent pyrene.
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5.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kovalev I. S., Sadieva L. K., Taniya O. S., Yurk V. M., Minin A. S., Santra S., Zyryanov G. V., Charushin V. N., Chupakhin O. N., Tsurkan M. V.
Заглавие : Computer vision vs. spectrofluorometer-assisted detection of common nitro-explosive components with bola-type PAH-based chemosensors
Место публикации : RSC Advances. - 2021. - Vol. 11, № 42. - С. 25850-25857
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Computer vision (CV) algorithms are widely utilized in imaging processing for medical and personal electronics applications. In sensorics CV can provide a great potential to quantitate chemosensors' signals. Here we wish to describe a method for the CV-assisted spectrofluorometer-free detection of common nitro-explosive components, e.g. 2,4-dinitrotoluene (DNT) and 2,4,6-trinitrotoluene (TNT), by using polyaromatic hydrocarbon (PAH, PAH = 1-pyrenyl or 9-anthracenyl) – based bola-type chemosensors. The PAH components of these chemical bolas are able to form stable, bright emissive in a visual wavelength region excimers, which allows their use as extended matrices of the RGB colors after imaging and digital processing. In non-polar solvents, the excimers have poor chemosensing properties, while in aqueous solutions, due to the possible micellar formation, these excimers provide “turn-off” fluorescence detection of DNT and TNT in the sub-nanomolar concentrations. A combination of these PAH-based fluorescent chemosensors with the proposed CV-assisted algorithm offers a fast and convenient approach for on-site, real-time, multi-thread analyte detection without the use of fluorometers. Although we focus on the analysis of nitro-explosives, the presented method is a conceptual work describing a general use of CV for quantitative fluorescence detection of various analytes as a simpler alternative to spectrofluorometer-assisted methods.
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6.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Slovesnova N. V., Minin A. S., Taniya O. S., Tsmokalyuk A. N., Kovalev I. S., Kopchuk D. S., Krinochkin A. P., Zyryanov G. V., Charushin V. N., Petrov A. Y., Kim G. A., Smolyuk L. T., Pozdina V. A.
Заглавие : Synthesis of new water-soluble polyarene-substituted naphtho[1,2-d]oxazole-based fluorophores as fluorescent dyes and biological photosensitizers
Место публикации : Dyes and Pigments. - 2022. - Vol. 204. - Ст.110410
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
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7.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mukherjee A., Kopchuk D. S., Kovalev I. S., Santra S., Varaksin M. V., Zyryanov G. V., Chupakhin O. N., Charushin V. N., Majee A.
Заглавие : Direct C−H functionalization of calix[N](het)arenes (N=4,6): a brief update
Место публикации : ChemistrySelect. - 2022. - Vol. 7, № 12. - С. e202103017
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Calix[n]arenes, their hetero derivatives, are the most popular hosts for the supramolecular and materials chemistry as they can form stable inclusion complexes with charged or neutral molecules, including gases. This short review highlights the most prospective synthetic approaches for direct modification of calix[4]arene core with various functional moieties as well as selected patterns of direct C−H-modification of calix[6]arenes and calix[4]pyrroles.
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8.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mohammed M. S. I., Kovalev I. S., Slovesnova N. V., Sadieva L. K., Platonov V. A., Novikov A. S., Santra S., Morozova J. E., Zyryanov G. V., Charushin V. N., Ranu B. C.
Заглавие : Polyaromatic hydrocarbon (PAH)-based aza-POPOPS: synthesis, photophysical studies, and nitroanalyte sensing abilities
Место публикации : International journal of molecular sciences. - 2023. - Vol. 24, № 12. - С. 10084
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): aza-popops--click reactions--chemosensors
Аннотация: 1,4-Bis(5-phenyl-2-oxazolyl)benzene (POPOP) is a common scintillation fluorescent laser dye. In this manuscript, the synthesis of 2-Ar-5-(4-(4-Ar'-1H-1,2,3-triazol-1-yl)phenyl)-1,3,4-oxadiazoles (Ar, Ar' = Ph, naphtalenyl-2, pyrenyl-1, triphenilenyl-2), as PAH-based aza-analogues of POPOP, by means of Cu-catalyzed click reaction between 2-(4-azidophenyl)-5-Ar-1,3,4-oxadiazole and terminal ethynyl-substituted PAHs is reported. An investigation of the photophysical properties of the obtained products was carried out, and their sensory response to nitroanalytes was evaluated. In the case of pyrenyl-1-substituted aza-POPOP, dramatic fluorescence quenching by nitroanalytes was observed.
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9.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Taniya O. S., Fedotov V. V., Sadieva L. K., Krinochkin A. P., Kovalev I. S., Kopchuk D. S., Zyryanov G. V., Ulomsky E. N., Rusinov V. L., Charushin V. N., Novikov A. S., Liu Y.
Заглавие : Abnormal push-pull benzo[4,5]imidazo[1,2-a][1,2,3]triazolo[4,5-e]pyrimidine fluorophores in planarized intramolecular charge transfer (PLICT) state: Synthesis, photophysical studies and theoretical calculations
Место публикации : Dyes and Pigments. - 2022. - Vol. 204. - Ст.110405
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The combination of excellent luminescence with high solvent polarity effect and aggregation induced emission (AIE) is an ideal combination for creating fluorophores/probes with high microenvironmental sensitivity. However, many push-pull chromophores of the D−A type in common intramolecular charge transfer (ICT) state with a significant solvatochromic effect and AIE activity, have poor luminescent properties. Herein, to overcome this problem by using reactions of nucleophilic aromatic hydrogen substitution (SNH), we have designed a series of novel 4-heteroaryl-substituted 2-aryl-2H-benzo[4,5]imidazo[1,2-a][1,2,3]triazolo[4,5-e]pyrimidine fluorophores possessing a planarized intramolecular charge transfer (PLICT) state. All these fluorophores exhibited high luminescence quantum yields (up to 60%) and large Stokes shift values of up to 7459 cm−1. Among them, the fluorophore 4h was found to exhibit the most pronounced positive solvatochromic effect and the probe 4f exhibited the most pronounced aggregation induced emission characteristics. This AIE behavior was further confirmed by means of time-resolved fluorescence lifetime measurements as well as DFT-assisted geometry optimization studies. In the presence of trifluoroacetic acid (TFA) compound 4h exhibited a well-pronounced acidochromism via visible color change from yellow-green to orange which returned to the original yellow-green solution after the addition of triethylamine (TEA). The Stern-Volmer constant for the probe 4h towards TFA was 38 M−1. Finally, for the compounds 4f, g, h theoretical calculations in the ground and excited states in different solvents were carried out to confirm the PLICT process. Based on all above the herein reported PLICT fluorophores 4a-h can be successfully applied as biological probes and optical switches.
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10.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Mohammed M. S. I., Sadieva L. K., Kovalev I. S., Taniya O. S., Kopchuk D. S., Zyryanov G. V., Charushin V. N., Ranu B. C.
Заглавие : Using the click methodology for the synthesis of peg-substituted polyaromatic chemosensors for the detection of nitroaromatic compounds
Место публикации : Успехи синтеза и комплексообразования = Advances in synthesis and complexing : сборник тезисов шестой Международной научной конференции. - Москва, 2022. - С. 210
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
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