Molecular Magnetic Switches (MMS)
Since 2009, we have been interested in two kinds of MMS :
Both systems can be reversibly switched between two electronic configurations under the application of external stimuli : light, temperature, pressure, electric field, etc.
This switching between two electronic configurations are accompanied by changes in the physical properties : magnetic, optical, dielectric,...
These changes can be drastic in particular for Fe(II) SCO and cyanide-bridged Fe-Co CT complexes.
To learn more , see below or visit www.lescouezec.fr
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Charge Transfer switchable complexes
CUBES
redox sxitch + magnetic switch
Since 2016, we have focused our research on MMS cubic molecules. These octametallic M4M'4 cubes are not only beautiful MMS but they also exhibit a remarkable redox behaviour with up to nine reversibly accessible redox states...
SQUARES
We can start the story here, in 2009, with a difficult synthesis of a tridentate facial ligand that we obtained at the mg scale... useless ! Luckily the first step in that synthesis was the preparation of a bidentate ligand, bis(N-methyl-imidazolyl)ketone (named bik), that turns out to be very useful for aobtaining MMS...
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SCO complexes
Polymetallic SCO complexes
Monometallic SCO complexes
Oxamate Coordination Chemistry
In this research axis, we more specifically target :
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anisotropic magnetic complexes that can show SMM behaviour
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magnetic coordination polymers of variable dimensionality
Tipically, two different synthetic strategies are explored :
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serendipity approaches (using wet chemistry approaches and solvothermal syntheses)
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rational approach such as the metallo-supramolecular approach
More info in publications
Electro-Active Molecules and Materials
1. Electro-active Coordination Polymers
2. Redox Switches and Electrochromism
