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 Найдено в других БД:Каталог книг и продолжающихся изданий (5)Труды Института высокотемпературной электрохимии УрО РАН (1)Труды сотрудников Института химии твердого тела УрО РАН (2)Публикации Чарушина В.Н. (25)
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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., 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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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tonkoglazova D. I., Gulevskaya A. V., Askalepova O. I., Chistyakov K. A.
Заглавие : Synthesis, crystal structures and properties of carbazolebased [6]helicenes fused with an azine ring
Место публикации : Beilstein journal of organic chemistry. - 2021. - Vol. 17. - С. 11-21
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): azine-fused helicenes--carbazole-based [6]helicenes--helical structures
Аннотация: Novel carbazole-based [6]helicenes fused with an azine ring (pyridine, pyrazine or quinoxaline) have been prepared through a five-step synthetic sequence in good overall yields. Commercially available 2,3-dihaloazines were used as starting materials. To discern the effect of merging an azine moiety within a helical skeleton, the X-ray structures, UV–vis absorption and fluorescence spectra of the helicenes were investigated and compared to that of the parent carbazole-based [6]helicene (7H-phenanthro[3,4-c]carbazole).
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3.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nikonov I. L., Khalymbadzha I. A., Sadieva L. K., Savchuk M. I., Starnovskaya E. S., Kopchuk D. S., Kovalev I. S., Kim G. A., Chupakhin O. N.
Заглавие : Benzo[de]naphtho[1,8-gh]quinolines: synthesis, photophysical studies and nitro explosives detection
Место публикации : Chimica Techno Acta. - 2021. - Vol. 8, № 4. - Ст.20218415
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): benzo[de]naphtha [1,8-gh]quinolones--fluorescence--sensor--explosives
Аннотация: A rational synthetic approach to substituted naphtho[1,8-gh]quinolines based on intramolecular cyclization in the presence of potassium in the series of (naphthalen-1-yl)isoquinolines is described. The photophysical properties of the obtained compounds were studied; in particular, fluorescence emission was detected in the range 454-482 nm with a quantum yield of up to 54%. We also calculated the HOMO-LUMO energies and optimized molecular structures for the resulting fluorophores. Based on the results of fluorescence titration, the Stern-Volmer constants (up to 21587 M-1) and the detection limits of nitroanalytes (up to 1.4 ppm) were calculated, confirming the possibility of their use as potential chemosensors for the visual detection of nitro-containing explosives.
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4.

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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5.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nikonov I. L., Sadieva L. K., Savchuk M. I., Starnovskaya E. S., Kopchuk D. S., Kovalev I. S., Kim G. A., Chupakhin O. N.
Заглавие : New naphtho[1,8-ef]perimidines: synthesis, fluorescence studies and application for detection of nitroanalytes
Место публикации : Chimica Techno Acta. - 2021. - Vol. 8, № 4. - Ст.20218416
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): naphtho[1,8-ef]perimidines--fluorescence--sensor--explosives
Аннотация: A rational approach to the synthesis of substituted naphtho[1,8-ef]perimidines based on SNH methodology and cyclization reaction in the series of condensed azines with naphthalene substituents was presented. Photophysical properties of the obtained fluorophores were studied, in particular, green fluorescence in the 485–536 nm range with quantum yield up to 32.4% was detected. HOMO-LUMO energy values and distributions for the new compounds were calculated by the DFT method in comparison with nitroanalytes and perylene. Based on the data obtained, as well as on the results of fluorescence titration, the possibility of using the new diazaperylenes as potential chemosensors for the visual detection of nitro-containing explosives was shown.
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6.

Вид документа : Статья из журнала
Шифр издания : Г/T 44
Автор(ы) : Moshkina T. N., Nosova E. V., Lipunova G. N., Slepukhin P. A., Nikonov I. L., Charushin V. N., Zhilina E. F.
Заглавие : The Rh(III)-catalysed C-H/N-H annulation of 2-thienyl- and 2-phenyl-quinazolin-4(3: H)-ones with diphenylacetylene
Место публикации : New Journal of Chemistry. - 2021. - Vol. 45, № 19. - С. 8456-8466
ББК : Г
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A series of 4,5-diphenyl-7H-thieno[2′,3′:3,4]pyrido[2,1-b]quinazolin-7-ones was synthesized via the Rh(III)-catalyzed annulation of 2-thienylquinazolin-4(3H)-ones with diphenylacetylene. 2-Phenylquinazolin-4(3H)-one amide alcoholysis and double C–H functionalization proceeded under the same reaction conditions with the formation of 2,3,7,8-tetraphenyl-1H-benzo[d,e][1,8]-naphthyridine derivatives. All compounds possess fluorescence properties in MeCN and toluene solutions as well as in the solid state. The aggregation induced emission (AIE) properties and the ability to detect Fe3+ cations were evaluated.
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7.

Вид документа : Статья из журнала
Шифр издания : Г/A 10
Автор(ы) : Eddin M. Z., Pervova M. G., Zhilina E. F., Chistyakov K. A., Verbitskiy E. V., Rusinov G. L., Charushin V. N.
Заглавие : A new approach to 4-arylstyrenes: microwave-assisted synthesis and photophysical properties
Место публикации : Russian chemical bulletin. - 2021. - Vol. 70, № 11. - С. 2139-2144
ББК : Г
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): styrene--4-vinylbiphenyl derivatives--suzuki—miyaura cross-coupling--fluorescence
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8.

Вид документа : Статья из журнала
Шифр издания : Г/P 58
Автор(ы) : Eltyshev A. K., Agafonova I. A., Minin A. S., Pozdina V. A., Shevirin V. A., Slepukhin P. A., Belskaya N. P., Benassi E.
Заглавие : Photophysics, photochemistry and bioimaging application of 8-azapurine derivatives
Место публикации : Organic & biomolecular chemistry. - 2021. - Vol. 19, № 45. - С. 9880-9896
ББК : Г
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: New 2-aryl-1,2,3-triazolopyrimidines were designed, synthesized, and characterized. Their optical properties were thoroughly studied in the solid phase, in solution and in a biological environment. Density Functional Theory (DFT) based calculations were performed, including the molecular geometry optimization for both the ground state and the first singlet excited state, the prediction of the UV-Vis absorption and fluorescence spectra, the determination of the molecular electrostatic properties and the solvent effect on the optical properties. The emission intensity was revealed to increase in time upon irradiation. Mass spectrometric research, quantum mechanical calculations, and analysis of literature data suggested a possible photo-transformation pathway through the homolytic cleavage of one of the C–Cl bonds upon irradiation with UV light. The structure of the active intermediate was identified by the series of mass spectrometry experiments and via synthesis of putative transformation products. The kinetic parameters measured in different solvents allowed estimating the rate of these photo-transformations. Biological experiments demonstrated that 2-aryl-1,2,3-triazolopyrimidines penetrate cells and selectively accumulate in the cell membrane and the Golgi complex and endoplasmic reticulum. Their unique properties pave the way for new possible applications of fluorescent 8-azapurines in biology and medicine.
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9.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Moshkina T. N., Nosova E. V., Charushin V. N., Lipunova G. N., Valova M. S., Petrusevich E. F., Zalesny R., Osmialowski B.
Заглавие : Substituted 2-(2-hydroxyphenyl)–3H-quinazolin-4-ones and their difluoroboron complexes: Synthesis and photophysical properties
Место публикации : Spectrochimica acta part A: molecular and biomolecular spectroscopy. - 2021. - Vol. 252. - С. 119497
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): esipt--fluorescence--o-ligand--bf2-complex2-(2-hydroxyphenyl)–3h-quinazolin-4-ones
Аннотация: 2-(2-Hydroxyphenyl)–3H-quinazolin-4-ones with diverse substituents at phenol ring and their six-membered difluoroboron complexes have been synthesized via few-stage approach. The photophysical properties of target compounds have been investigated in two solvents as well as in the solid state. The nature of substituents and substitution point in the phenol moiety of ligands and resulting BF2-complexes on the photophysical properties of dyes have been explored. The complex bearing two t-Bu groups proved to be the most emissive in solid state, whereas its 5-methoxy and 4-diethylamino counterparts possess strong emission in toluene solution. The dyes exhibited large Stokes shifts which was attributed to excited state intramolecular proton transfer (ESIPT). Additionally, fluorescence of quinazolinones in the mixture of THF/water was studied. All ligands demonstrated emission enhancement with increase of water fraction which was due to aggregation induced emission.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Reddivari C. K. R., Devineni S. R., Yellalavenkata R. R., Chamarthi N. R., Shaik N., Nemallapudi B. R., Sravya G., Zyryanov G. V., Avula B., Badavath V. N.
Заглавие : Design, synthesis, biological evaluation and molecular docking studies of 1,4-disubstituted 1,2,3-triazoles: peg-400:h2o mediated click reaction of fluorescent organic probes under ultrasonic irradiation
Место публикации : Polycyclic aromatic compounds. - 2021. - Vol. 42, № 7. - С. 3953-3974
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): ultrasonication--123-triazole--antioxidant activity
Аннотация: The perpetual demand of medicinally significant scaffolds has prompted the synthetic chemists to identify simple and efficient routes for flawless synthesis. A PEG-400:H2O mediated highly versatile, efficacious and selective “Click reaction” of fluorescent organic Probes under ultrasonic irradiation is reported. 1,2,3-Triazole ring has also been revealed to play a crucial role in bioorthogonal methodologies, fragment-based drug design, and biomolecular mimetics. This methodology provides a rapid and efficient approach for the synthesis of 1,4-Disubstituted 1,2,3-triazoles under Copper (I)-Catalyzed Azide-Alkyne [3 + 2] Cycloaddition (CuAAC) conditions in good to excellent yields in less time. This synthetic protocol has been proven to endorse easy work-up under benign reaction conditions. The green solvent system employed has been efficaciously reused several times without any loss of its activity in an aqueous medium. All the title compounds were characterized by using elemental analysis, 1HNMR, 13CNMR, FTIR, and mass spectral data. The newly synthesized compounds were biologically evaluated for their antioxidant activity. The antioxidant activity results demonstrate that all compounds showed good to excellent antioxidant activity, particularly the compounds 5d, 8 b, 8c and 8d exhibited promising radical scavenging activity. Further, photophysical properties of the compounds were accomplished using spectrofluorimeter. By this method, compounds 5c, 5e, 5f, 8a, 8 b, 8c and 8d exhibited fluorescence in the visible region. Molecular docking studies suggested the antioxidant activity of synthesized compounds due to the inhibition of neuronal nitric oxide synthase (HnNOS).
https://doi.org/10.1080/10406638.2021.1878246
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