Вид документа : Статья из журнала Шифр издания : Автор(ы) : Fatykhov R. F., Sharapov A. D., Starnovskaya E. S., Shtaitz Y. K., Savchuk M. I., Kopchuk D. S., Nikonov I. L., Zyryanov G. V., Khalymbadzha I. A., Chupakhin O. N. Заглавие : Coumarin-pyridine push-pull fluorophores: synthesis and photophysical studies Место публикации : Spectrochimica acta part A: molecular and biomolecular spectroscopy. - 2022. - Vol. 267. - Ст.120499 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: 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. Доп.точки доступа: Fatykhov, R. F.; Sharapov, A. D.; Starnovskaya, E. S.; Shtaitz, Y. K.; Savchuk, M. I.; Kopchuk, D. S.; Nikonov, I. L.; Zyryanov, G. V.; Khalymbadzha, I. A.; Chupakhin, O. N.