Cyclometalated iridium(III) complexes with acyl-pyrazolone ligands – towards tunable versatile building blocks and AIE emitters with external chelating fragments

Tatarin, S.V.; Meshcheriakova, E.A.; Korshunov, V.M.; Shikin, D.D.; Taydakov, I.V.; Ikhalaynen, Y.A.; Rodin, I.A.; Bezzubov, S.I.; Belousov, Y.A.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 4 марта 2026 г.

Авторы: Tatarin Sergei V., Meshcheriakova Elizaveta A., Korshunov Vladislav M., Shikin Daniil D., Taydakov Ilya V., Ikhalaynen Yury A., Rodin Igor A., Bezzubov Stanislav I., Belousov Yury A.
Журнал: Optical Materials
Том: 172
Год издания: 2026
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Номер статьи: 117806
DOI: 10.1016/j.optmat.2025.117806
Аннотация: Development of stimuli-responsive emissive materials is of great importance, and design of transition metal complexes with varying number of external chelating fragments may contribute to this field. In this work, three bis-cyclometalated iridium complexes with 2-acyl-pyrazolone ligands in both metalated and ancillary modes were synthesized and studied by various spectroscopic techniques, single-crystal X-ray diffraction and cyclic voltammetry. It was shown that the complex with cyclometalated acyl-pyrazolone (and thus, two external diketonate sites) is non-luminescent in solution, but demonstrates aggregation-induced emission. In turn, complexes with ancillary acyl-pyrazolone (and one external diketonate site, respectively) possess bright emission in the visible region, which is tunable by replacement of the cyclometalated counterpart and reversibly quenched by protonation/deprotonation. The experimental study was corroborated by quantum chemical calculations, which showed that spin density localization at the triplet excited state plays crucial role in emissive properties of the target complexes.
Добавил в систему: Родин Игорь Александрович

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Cyclometalated iridium(III) complexes with acyl-pyrazolone ligands – towards tunable versatile building blocks and AIE emitters with external chelating fragmentsстатья

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