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. 2016 Oct 17;22(43):15227-15230.
doi: 10.1002/chem.201603482. Epub 2016 Sep 19.

Redox-Assisted Self-Assembly of a Water-Soluble Cyanido-Bridged Mixed Valence {CoIII /FeII }2 Square

Laura Alcázar  1 , Gabriel Aullón  1 , Montserrat Ferrer  1 , Manuel Martínez  2
Affiliations

Redox-Assisted Self-Assembly of a Water-Soluble Cyanido-Bridged Mixed Valence {CoIII /FeII }2 Square

Laura Alcázar et al. Chemistry. .

Abstract

The facile redox-assisted assembly of a water-soluble, extremely robust, cyanide-bridged mixed-valence [{CoIII {(Me)2 (μ-ET)cyclen}}2 {(μ-NC)2 FeII (CN)4 }2 ]2- square is reported. The preparation process involved the use of the enhanced lability of inert CoIII synthons triggered by outer-sphere redox processes. Characterization of the final compounds has been carried out by NMR, UV/Vis, electrochemistry, and ICP analyses. DFT calculations have been conducted to optimize a structure that has the same hydrodynamic radius as that obtained from DOSY experiments. The new compound is extremely robust, surviving in aqueous solution within the 0-12 pH range for months. The species shows a high affinity for both protons and hydroxo ions in aqueous medium.

Keywords: cyanido bridged species; mixed-valence complexes; redox mechanisms; self-assembly.

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