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Electron Transfer in the Cs⊂{Mn4 Fe4 } Cubic Switch: A Soluble Molecular Model of the MnFe Prussian-Blue Analogues.
Angewandte Chemie International Edition ( IF 12.959 ) Pub Date : 2020-01-14 , DOI: 10.1002/anie.201916199
Juan-Ramón Jiménez,Jana Glatz,Amina Benchohra,Geoffrey Gontard,Lise-Marie Chamoreau,Jean-François Meunier,Azzedine Bousseksou,Rodrigue Lescouëzec

A mixed‐valence {MnII3MnIIIFeII2FeIII2} cyanide‐bridged 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 electrochromic 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.
更新日期:2020-01-14

 

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