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Fatykhov RF, Sharapov AD, Starnovskaya ES, Shtaitz YK, Savchuk MI, Kopchuk DS, Nikonov IL, Zyryanov GV, Khalymbadzha IA, Chupakhin ON. Coumarin-pyridine push-pull fluorophores: Synthesis and photophysical studies. Spectrochim Acta A Mol Biomol Spectrosc 2022; 267:120499. [PMID: 34749256 DOI: 10.1016/j.saa.2021.120499] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 10/08/2021] [Accepted: 10/10/2021] [Indexed: 06/13/2023]
Abstract
A series of coumarin-pyridine-based push-pull fluorophores were prepared starting from 1,2,4-triazines by using direct C-H functionalization (SNH-reaction)-Diels-Alder-retro Diels-Alder domino reaction sequence. This efficient synthetic strategy allowed to obtain a series of 19 coumarin-pyridine fluorophores. Their photophysical properties were studied. While pyridine-substituted derivatives of 4-alkylcoumarins may be considered as alternative to coumarin dyes characterized by emission maxima mainly in a visible region with wavelengths of 402-415 nm, absorption in the UV range at 210-307 nm, and good photoluminescence quantum yields of 6-19%, all the derivatives of 4-phenylcoumarin did not exhibit any noticeable fluorescence. More detailed photophysical studies were carried out for two the most representative derivatives of 4-alkyl-coumarin-pyridines to demonstrate their positive solvatochromism, and the collected data were analyzed by using Lippert-Mataga equation, as well as Kosower and Dimroth/Reichardt scales. The obtained results demonstrate that the combining two chromophore systems, such as 2,5-diarylpyridine and coumarin ones, is promising in terms of improving the photophysical properties of the new coumarin-pyridine hybrid compounds.
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Affiliation(s)
- Ramil F Fatykhov
- Department of Organic and Biomolecular Chemistry, Ural Federal University, Mira 19, Ekaterinburg 620002, Russian Federation
| | - Ainur D Sharapov
- Department of Organic and Biomolecular Chemistry, Ural Federal University, Mira 19, Ekaterinburg 620002, Russian Federation
| | - Ekaterina S Starnovskaya
- Department of Organic and Biomolecular Chemistry, Ural Federal University, Mira 19, Ekaterinburg 620002, Russian Federation; Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, Kovalevskoy 22, Ekaterinburg 620219, Russian Federation
| | - Yaroslav K Shtaitz
- Department of Organic and Biomolecular Chemistry, Ural Federal University, Mira 19, Ekaterinburg 620002, Russian Federation
| | - Maria I Savchuk
- Department of Organic and Biomolecular Chemistry, Ural Federal University, Mira 19, Ekaterinburg 620002, Russian Federation; Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, Kovalevskoy 22, Ekaterinburg 620219, Russian Federation
| | - Dmitry S Kopchuk
- Department of Organic and Biomolecular Chemistry, Ural Federal University, Mira 19, Ekaterinburg 620002, Russian Federation; Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, Kovalevskoy 22, Ekaterinburg 620219, Russian Federation
| | - Igor L Nikonov
- Department of Organic and Biomolecular Chemistry, Ural Federal University, Mira 19, Ekaterinburg 620002, Russian Federation; Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, Kovalevskoy 22, Ekaterinburg 620219, Russian Federation
| | - Grigory V Zyryanov
- Department of Organic and Biomolecular Chemistry, Ural Federal University, Mira 19, Ekaterinburg 620002, Russian Federation; Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, Kovalevskoy 22, Ekaterinburg 620219, Russian Federation
| | - Igor A Khalymbadzha
- Department of Organic and Biomolecular Chemistry, Ural Federal University, Mira 19, Ekaterinburg 620002, Russian Federation; Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, Kovalevskoy 22, Ekaterinburg 620219, Russian Federation.
| | - Oleg N Chupakhin
- Department of Organic and Biomolecular Chemistry, Ural Federal University, Mira 19, Ekaterinburg 620002, Russian Federation; Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, Kovalevskoy 22, Ekaterinburg 620219, Russian Federation
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