Fine-Tuning of the Optical and Electrochemical Properties of Ruthenium(II) Complexes with 2-Arylbenzimidazoles and 4,4′-Dimethoxycarbonyl-2,2′-bipyridine

Autor: Maria A. Lavrova, Stepan A. Verzun, Sergey A. Mishurinskiy, Maxim A. Sirotin, Sofya K. Bykova, Victoria E. Gontcharenko, Sofia S. Mariasina, Vladislav M. Korshunov, Ilya V. Taydakov, Yury A. Belousov, Vladimir D. Dolzhenko
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Molecules, Vol 28, Iss 18, p 6541 (2023)
Druh dokumentu: article
ISSN: 1420-3049
DOI: 10.3390/molecules28186541
Popis: A series of cyclometalated complexes of ruthenium (II) with four different substituents in the aryl fragment of benzimidazole was synthesized in order to study the effect of substituent donation on the electronic structure of the substances. The resulting complexes were studied using X-ray diffraction, NMR spectroscopy, MALDI mass spectrometry, electron absorption spectroscopy, luminescence spectroscopy, and cyclic voltammetry as well as DFT/TDDFT was also used to interpret the results. All the complexes have intense absorption in the range of up to 700 nm, the triplet nature of the excited state was confirmed by measurement of luminescence decay. With an increase in substituent donation, a red shift of the absorption and emission bands occurs, and the lifetime of the excited state and the redox potential of the complex decrease. The combination of these properties shows that the complexes are excellent dyes and can be used as photosensitizers.
Databáze: Directory of Open Access Journals
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