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Characterization of a Dinuclear Copper(II) Complex and Its Fleeting Mixed‐Valent Copper(II)/Copper(III) Counterpart
Author(s) -
Kochem Amélie,
Gennarini Federica,
Yemloul Mehdi,
Orio Maylis,
Le Poul Nicolas,
Rivière Eric,
Giorgi Michel,
Faure Bruno,
Le Mest Yves,
Réglier Marius,
Simaan A. Jalila
Publication year - 2017
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201600636
Subject(s) - copper , electron paramagnetic resonance , chemistry , oxidizing agent , methane monooxygenase , electrochemistry , ligand (biochemistry) , redox , metastability , absorption spectroscopy , crystallography , absorption (acoustics) , inorganic chemistry , photochemistry , materials science , methane , organic chemistry , nuclear magnetic resonance , electrode , biochemistry , physics , receptor , quantum mechanics , composite material
The synthesis of a dinuclear copper(II) complex, supported by a 1,3‐diamino‐2‐propanol‐based tetraamide ligand, is reported. Structural properties in the solid state and in solution, by means of XRD analysis and NMR spectroscopy, respectively, provide evidence of a highly flexible complex that can display several conformations, leading to the image of the wings of a butterfly. The complex was fully characterized and the redox properties were investigated. Room‐temperature spectro‐electrochemistry was used to monitor the formation of a metastable mono‐oxidized product that displayed an absorption band centered at λ =463 nm. EPR investigation of the low‐temperature, chemically generated, mono‐oxidized product reveals the presence of an intermediate described as a mixed‐valent Cu II Cu III species, which is a model of the possible highly oxidizing intermediate in particulate methane monooxygenase.