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• W2000548248 abstract "We synthesized a new homoleptic, tris-bidentate complex [Ru(QPzH)3]2+ based on the novel biheteroaromatic, 8-(3-pyrazolyl)-quinoline ligand QPzH. The QPzH ligand was designed to reduce the distortions typically observed in complexes incorporating the 8-quinolinyl group into the ligand framework. This was indeed observed, and was also, as anticipated, found to facilitate the formation of tris-homoleptic Ru(II) complexes; [Ru(QPzH)3]2+ is the first reported tris-homoleptic complex with ligands based on the 8-quinolinyl group. The synthesis can either result in a statistical 3:1 mer/fac ratio of the complex, or, through controlled exposure to light, be tweaked to allow isolation of the pure mer isomer only. X-ray crystallography reveals three nonequivalent ligands, with significantly less strain than other quinoline-based bidentate ligands. The complex exhibits a nearly octahedral coordination geometry but shows large differences in bond lengths between the Ru core and the quinoline and pyrazoles, respectively. The Ru–N(pyrazole) bond distances are ∼2.04 Å, while the corresponding distances for Ru–N(quinoline) are ∼2.12 Å. Structural, photophysical, electrochemical, and theoretical characterization revealed a mer-Ru(II) complex with a low oxidation potential (0.57 V vs ferrocene0/+) attributed to the incorporation of the pyrazolyl group, a ground state absorption that is sensitive to the local environment of the complex, and a short-lived 3MLCT excited state." @default.
• W2000548248 created "2016-06-24" @default.
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• W2000548248 date "2014-11-24" @default.
• W2000548248 modified "2023-10-11" @default.
• W2000548248 title "A Homoleptic Trisbidentate Ru(II) Complex of a Novel Bidentate Biheteroaromatic Ligand Based on Quinoline and Pyrazole Groups: Structural, Electrochemical, Photophysical, and Computational Characterization" @default.
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• W2000548248 doi "https://doi.org/10.1021/ic502432c" @default.
• W2000548248 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25420224" @default.
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