The Effect of the Ancillary Ligand on Optical and Redox Properties of Cyclometalated Iridium(III) 2,5-Diphenyloxazole Complexes

Zakharov, A. Yu.; Kovalenko, I. V.; Meshcheriakova, E. A.; Nykhrikova, E. V.; Zharova, A. O.; Kiseleva, Marina A.; Kalle, Paulina; Tekshina, E. V.; Kozyukhin, Sergei A.; Емец, В. В.; Bezzubov, Stanislav I.

doi:10.1134/s1070328422700051

Cited by 3 publications

(1 citation statement)

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“…In addition to ruthenium(II) complexes, benzimidazoles have been used as C^N ligands in iridium(III) complexes [ 52 ]. It is shown that the expansion of the conjugated ligand system and its geometry have a significant effect not only on the electronic structure of the complex, but also on its structure and composition [ 53 , 54 , 55 ].…”

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confidence: 99%

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

Lavrova,

Verzun,

Mishurinskiy

et al. 2023

Molecules

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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.

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