Photorelease of Nitric Oxide (NO) in Mono- and Bimetallic Ruthenium Nitrosyl Complexes: A Photokinetic Investigation with a Two-Step Model - Archive ouverte HAL
Article Dans Une Revue Inorganic Chemistry Année : 2024

Photorelease of Nitric Oxide (NO) in Mono- and Bimetallic Ruthenium Nitrosyl Complexes: A Photokinetic Investigation with a Two-Step Model

Résumé

Two monometallic and three bimetallic ruthenium acetonitrile (RuMeCN) complexes are presented and fully characterized. All of them are built from the same skeleton [FTRu(bpy)(MeCN)]$^{2+}$, in which FT is a fluorenyl-substituted terpyridine ligand and bpy is the 2,2′-bipyridine. The crystal structure of [FTRu(bpy)(MeCN)](PF$_6$)$_2$ is presented. A careful spectroscopic analysis allows establishing that these 5 RuMeCN complexes can be identified as the product of the photoreaction of 5 related RuNO complexes, investigated as efficient nitric oxide (NO) donors. Based on this set of complexes, the mechanism of the NO photorelease of the bimetallic complexes has been established through a complete investigation under irradiations performed at 365, 400, 455, and 490 nm wavelength. A two-step (A → B → C) kinetic model specially designed for this purpose provides a good description of the mechanism, with quantum yields of photorelease in the range 0.001–0.029, depending on the irradiation wavelength. In the first step of release, the quantum yields (ϕ$_{AB}$) are always found to be larger than those of the second step (ϕ$_{BC}$), at any irradiation wavelengths.
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Dates et versions

hal-04666484 , version 1 (01-08-2024)

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Yael Juarez-Martinez, Pablo Labra-Vázquez, Pascal Lacroix, Marine Tassé, Sonia Mallet-Ladeira, et al.. Photorelease of Nitric Oxide (NO) in Mono- and Bimetallic Ruthenium Nitrosyl Complexes: A Photokinetic Investigation with a Two-Step Model. Inorganic Chemistry, 2024, 63 (17), pp.7665-7677. ⟨10.1021/acs.inorgchem.3c04496⟩. ⟨hal-04666484⟩
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