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Общее количество найденных документов : 31
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1.

Вид документа : Статья из журнала
Шифр издания : 54
Автор(ы) : Lipunova G. N., Nosova E. V., Charushin V. N., Chupakhin O. N.
Заглавие : Boron(III) Complexes with N,​N'- and N,​O-​Heterocyclic Ligands: Synthesis and Spectroscopic Properties
Место публикации : Comments on Inorganic Chemistry. - 2016. - Vol. 2016. - С. 1153470
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): properties --preparation-- synthetic preparation
Аннотация: This review is focused on consideration of effects of the nature of N,​N'- and N,​O-​bidentate ligands on the structure and optical properties of their B(III) complexes. It has been established that B(III) complexes with asym. N,​N'- and N,​O-​bidentate ligands, such as ortho-​hydroxyphenyl substituted azaheterocycles and heteryl-​β-​ketoimines, exhibit large Stokes shifts, enhanced intensity, and extended range for luminescence in solns. as well as in solid state, comparable with characteristics of the family of BODIPYs derivs. Complexes of some bidentate ligands can be considered as promising fluorophores for applications in biomedical imaging, electroluminescent, solar cell devices, and other fields.
\\\\expert2\\nbo\\Comments on Inorganic Chemistry\\2016. P. 1153470.pdf
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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Al-Ithawi W. K. A., Khasanov A. F., Valieva M. I., Baklykov A. V., Chistyakov K. A., Ladin E. D., Kovalev I. S., Nikonov I. L., Kim G. A., Platonov V. A., Kopchuk D. S., Wang Z., Zyryanov G. V.
Заглавие : (Mechano)synthesis of azomethine- and terpyridine-linked diketopyrrolopyrrole-based polymers
Место публикации : Chimica Techno Acta. - 2023. - Vol. 10, № 2. - С. 202310204
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): diketopyrrolopyrrole-based polymers--pd-catalyzed synthesis--mechanosynthesis
Аннотация: Three efficient synthetic approaches towards new azomethine- and terpyridine-containing 2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione (diketopyrrolopyrrole, DPP) based polymers, such as P1 and P2, are reported. The first approach involves the Pd-catalyzed synthesis via two- or three-component Suzuki or Stille cross-coupling reaction in solution. The second approach involves Pd-catalyzed Suzuki cross-coupling reaction under ballmilling conditions. And, finally, the third approach involves Pd-free condensation reaction under ball-milling conditions. The newly obtained polymers exhibited absorbance around 700 nm and emission around 900 nm, and, thus, these polymers are considered to be NIR-fluorophores.
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3.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Smyshliaeva L. A., Varaksin M. V., Fomina E. I., Medvedeva M. V., Svalova T. S., Kozitsina A. N., Charushin V. N., Chupakhin O. N., Demidov O. P., Borovlev I. V., Mensch C., Mampuys P., Maes B. U. W.
Заглавие : 1,3,7-triazapyrene-based ortho-carborane fluorophores: convenient synthesis, theoretical studies, and aggregation-induced emission properties
Место публикации : Organometallics. - 2021. - Vol. 40, № 16. - С. 2792-2807
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A convenient transition-metal-free approach, based on nucleophilic substitution of hydrogen (SNH), for consecutive regioselective C–H functionalization of 1,3,7-triazapyrene scaffolds with carboranyllithium and phenyllithium is reported. The theoretical calculations disclosed highlight key features in the regioselectivity and mechanism of the investigated SNH transformations. The novel 1,3,7-triazapyrene-based ortho-carboranes obtained have large potential in the field of molecular electronics as organic luminophores, which are characterized by the aggregation-induced emission and dual-emission effects.
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4.

Вид документа : Статья из журнала
Шифр издания : 54
Автор(ы) : Kozhevnikov D. N., Shabunina O. V., Kopchuk D. S., Slepukhin P. A., Kozhevnikov V. N.
Заглавие : 5-Aryl-2,2-bipyridines as tunable fluorophores
Место публикации : Tetrahedron Letters. - 2006. - Vol. 47, № 39. - С. 7025-7029
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Readily available 5-aryl-2,2?-bipyridines and their derivatives are a unique family of fine-tunable chromophores, where changes in the substitution patterns, solvation and coordination are translated into dramatic spectral changes. They exhibit sensitive and selective response to zinc ions with dramatic increases in emission intensity or significant red-shifts of emission maxima????
\\\\Expert2\\nbo\\Tetrahedron Letters\\2006, v. 47, p.7025.pdf
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5.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Lavrinchenko I. A., Moseev T. D., Varaksin M. V., Zyryanov G. V., Taniya O. S., Tsmokalyuk A. N., Charushin V. N., Chupakhin O. N., Demidov O. P., Borovlev I. V.
Заглавие : A BF3-mediated C–H/C–Li coupling of 1,3,7-triazapyrene with 2-thienyllithium in the design of push–pull fluorophores and chemosensors for nitroaromatics
Место публикации : New Journal of Chemistry. - 2022. - Vol. 46, № 11. - С. 5121-5128
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Mono- and bis-2-thienyl-substituted 1,3,7-triazapyrenes have been synthesized for the first time via BF3-mediated C–H/C–Li coupling of 1,3,7-triazapyrene with 2-thienyllithium in 33 and 51% yields, respectively. The photophysical properties of these polycyclic azaaromatics have been studied, with emission in the range of 450–500 nm and fluorescence quantum yields of up to 99% in methanol solutions being revealed. The turn-off chemosensing properties of 2-thienyl-substituted 1,3,7-triazapyrenes for the selective detection of nitroaromatics have also been assessed; in particular, the quenching constants according to the Stern–Volmer model, the quenching sphere radius according to the Perrin model, the detection limit and the quenching efficiency have been determined. In particular, 6,8-bis-(thiopen-2-yl)-1,3,7-triazapyrene, characterized by 10 times the quenching constant and limit of detection (LOD) compared to the mono-substituted analog, can be considered as the most promising chemosensor for determining nitroaromatic compounds. DFT calculations confirm the presence of intramolecular charge transfer (ICT) effects in the case of the obtained fluorophores and clarify the quenching mechanism for nitroaromatics.
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6.

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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7.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Lavrinchenko I. A., Moseev T. D., Seleznev Y. A., Varaksin M. V., Charushin V. N., Chupakhin O. N.
Заглавие : An efficient synthesis of push-pull fluorophores based on (2-fluoroaryl)-1,2,3-triazoles
Место публикации : Успехи синтеза и комплексообразования = Advances in synthesis and complexing : сборник тезисов шестой Международной научной конференции. - Москва, 2022. - С. 194
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
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8.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Moseev T. D., Varaksin M. V., Lavrinchenko I. A., Krinochkin A. P., Kopchuk D. S., Zyryanov G. V., Slepukhin P. A., Chupakhin O. N., Charushin V. N.
Заглавие : Aryne-mediated transformations of 5-perfluorophenyl-substituted 3-(pyridin-2-yl)-1,2,4-triazines in the design of novel 10-(1h-1,2,3-triazol-1-yl)pyrido[1,2-a]indole fluorophores
Место публикации : Tetrahedron. - 2020. - Vol. 76, № 18. - С. 131147
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): 1,2,3-triazoles--aryne-mediated transformations--caosambhwgmfew-uhfffaoysa-n--cyfqlmlvdsthgc-uhfffaoysa-n--fluoroarenes
Аннотация: A number of novel fluorinated derivatives of the family of pyrido[1,2-a]indole fluorophores have first been synthesized via the aryne-mediated domino transformations of 5-(perfluorophenyl)-3-(pyridin-2-yl)-1,2,4-triazines. A comprehensive study of photophysical properties of the obtained polyfluoroaryl substituted derivatives, in which polyfluoroaryl, 1,2,3-triazole, and pyridoindole subunits contribute to a joint chromophore system, has shown that these compounds proved to exhibit a fluoresce with green light in acetonitrile solutions.
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9.

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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10.

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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