Electron Transfer in the Cs⊂{Mn 4 Fe 4 } Cubic Switch: a Soluble Molecular Model of the MnFe Prussian-Blue Analogues - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Angewandte Chemie International Edition Année : 2020

Electron Transfer in the Cs⊂{Mn 4 Fe 4 } Cubic Switch: a Soluble Molecular Model of the MnFe Prussian-Blue Analogues

Résumé

A mixed-valence {MnII3 MnIII FeII2 FeIII2} cyanidebridged molecular cube hosting a caesium cation, Cs⊂ - {Mn4Fe4}, was synthesized and structurally characterized by X-ray diffraction. Cyclic-voltammetry measurements show that its electronic state can be switched between five different redox states, which results in a remarkable lectrochromic effect. Magnetic measurements on fresh samples point to the occurrence of a spin-state change near room temperature, which could be ascribed to a metal-to-metal electron transfer converting the {FeII-CN-MnIII} pair into a {FeIII-CN-MnII} pair. This feature was only previously observed in the polymeric MnFe Prussian-blue analogues (PBAs). Moreover, this novel switchable molecule proved to be soluble and stable in organic solvents, paving the way for its integration into advanced materials.
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Dates et versions

hal-02570673 , version 1 (12-05-2020)

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Juan-Ramón Jiménez, Jana Glatz, Amina Benchohra, Geoffrey Gontard, Lise-Marie Chamoreau, et al.. Electron Transfer in the Cs⊂{Mn 4 Fe 4 } Cubic Switch: a Soluble Molecular Model of the MnFe Prussian-Blue Analogues. Angewandte Chemie International Edition, 2020, 89, pp.8089-8093. ⟨10.1002/anie.201916199⟩. ⟨hal-02570673⟩
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