2026-10-15T08:47:27Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/68152022-08-24T00:05:45Zcom_10259_4354com_10259_5086com_10259_2604col_10259_4355
Repositorio Institucional de la Universidad de Burgos
author
Cuéllar, Elena
author
Diez Varga, Alberto
author
Torroba Pérez, Tomás
author
Domingo-Legarda, Pablo
author
Alemán, José
author
Cabrera, Silvia
author
Martín-Alvarez, Jose M.
author
Miguel, Daniel
author
Villafañe, Fernando
2022-08-23T10:29:35Z
2022-08-23T10:29:35Z
2021-05
0020-1669
http://hdl.handle.net/10259/6815
10.1021/acs.inorgchem.0c03389
1520-510X
New 1,2-azolylamidino complexes cis-[Ru(bipy)2(NH═C(R)az*-κ2N,N)](OTf)2 (R = Me, Ph; az* = pz, indz, dmpz) are synthesized via chloride abstraction after a subsequent base-catalyzed coupling of a nitrile with the previously coordinated 1,2-azole. The synthetic procedure allows the easy obtainment of complexes having different electronic and steric 1,2-azoylamidino ligands. All of the compounds have been characterized by 1H, 13C, and 15N NMR and IR spectroscopy and by monocrystal X-ray diffraction. Photophysical studies support their phosphorescence, whereas their electrochemistry reveals reversible RuII/RuIII oxidations between +1.13 and +1.25 V (vs SCE). The complexes have been successfully used as catalysts in the photooxidation of different thioethers, the complex cis-[Ru(bipy)2(NH═C(Me)dmpz-κ2N,N)]2+ showing better catalytic performance in comparison to that of [Ru(bipy)3]2+. Moreover, the significant catalytic performance of the dimethylpyrazolylamidino complex is applied to the preparation of the drug modafinil, which is obtained using ambient oxygen as an oxidant. Finally, mechanistic assays suggest that the oxidation reaction follows a photoredox route via oxygen radical anion formation.
eng
Atribución 4.0 Internacional
Ketones
Ligands
Materials
Nitrogen compounds
Oxidation
Luminescent cis-Bis(bipyridyl)ruthenium(II) Complexes with 1,2-Azolylamidino Ligands: Photophysical, Electrochemical Studies, and Photocatalytic Oxidation of Thioethers
info:eu-repo/semantics/article
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https://riubu.ubu.es/bitstream/10259/6815/1/Cuellar-ic_2021.pdf
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Cuellar-ic_2021.pdf