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Superphotoacidic properties and pH-switched Stokes shifts in electron-deficient 5-hydroxyisoquinolone derivativesстатья Исследовательская статья
- Авторы: Salikov Rinat F., Belyy Alexander Yu, Trainov Konstantin P., Velmiskina Julia A., Medvedev Michael G., Korshunov Vladislav M., Taydakov Ilya V., Platonov Dmitry N., Tomilov Yury V.
- Журнал: Journal of Photochemistry and Photobiology A: Chemistry
- Год издания: 2022
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- DOI: 10.1016/j.jphotochem.2022.113808
- Аннотация: Four electron-deficient 5-hydroxyisoquinolones are among the strongest currently known superphotoacids with excited state pKa* down to -5.8 and ΔpKa up to 9.0, as estimated experimentally via Förster cycle and supported by quantum chemical calculations. A condensed teracyclic derivative is a weaker photoacid with ΔpKa of around three units. The superphotoacidity in turn initiates pH-switched Stokes shifts: irrespective of the form (protonated or deprotonated) absorbing the photon, only emission of the deprotonated form is observed in protic media.
- Добавил в систему: Вельмискина Юлия Андреевна