Metal-to-Metal Electron Transfer in Co/Fe Prussian Blue Molecular Analogues: The Ultimate Miniaturization.

Evangelia S. Koumousi (1, 2) , Ie-Rang Jeon (1, 2) , Qian Gao (3) , Pierre Dechambenoit (1) , Daniel N. Woodruff (1) , Pascal Merzeau (1) , Lionel Buisson (1) , Xiaolu Jia (3) , Dongfeng Li (3) , Florence Volatron (4) , Corine Mathonière (2) , Rodolphe Clérac (1)

1 CRPP - Centre de recherches Paul Pascal
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
3 College of Chemistry, Key Laboratory of Pesticide and Chemical Biology
4 ICMMO - Institut de Chimie Moléculaire et des Matériaux d'Orsay

Co/Fe Prussian Blue analogues are known to display both thermally and light induced electron transfer attributed to the switching between diamagnetic {Fe(II)LS(μ-CN)Co(III)LS} and paramagnetic {Fe(III)LS(μ-CN)Co(II)HS} pairs (LS = low spin; HS = high spin). In this work, a dinuclear cyanido-bridged Co/Fe complex, the smallest {Fe(μ-CN)Co} moiety at the origin of the remarkable physical properties of these systems, has been designed by a rational building-block approach. Combined structural, spectroscopic, magnetic and photomagnetic studies reveal that a metal-to-metal electron transfer that can be triggered in solid state by light, temperature and solvent contents, is observed for the first time in a dinuclear complex.

Domaines: Matériaux

Evangelia S. Koumousi, Ie-Rang Jeon, Qian Gao, Pierre Dechambenoit, Daniel N. Woodruff, et al.. Metal-to-Metal Electron Transfer in Co/Fe Prussian Blue Molecular Analogues: The Ultimate Miniaturization.. Journal of the American Chemical Society, 2014, 136 (44), pp.15461-15464. ⟨10.1021/ja508094h⟩. ⟨hal-01088567⟩