Presentation of SOMaF Team
(Synthèse Organique et Matériaux Fonctionnels)
Group leader : HUDHOMME Piétrick (PR)
David Canevet (MC)
Sébastien Goeb (CR)
Stéphanie Legoupy (CR)
Marc Salle (PR)
Rocard Lou (MC contractual)
Choisnet Thomas (Doctorant)
Dekhtiarenko Maksym (Post-Doctorant)
Drou Choisnet Thomas (Doctorant)
El Berjawi Rayane (Doctorante)
Séjourné Simon (Doctorant)
SOMaF Team Research Activity
The SOMaF team focuses its activities on the development of new synthetic methodologies for the elaboration of functional molecular materials with specific electronic and/or optical properties. Illustrative examples are the preparation of tetrathiafulvalene and fullerene molecular building blocks, nanotubes, perylenediimides, and polypyridines acceptors.
The corresponding areas of research concerns :
the construction by self-assembly of switchable electro-and photo-active systems,
the elaboration of tetrathiafulvalene based receptors for molecular recognition,
the development of new functionalized fullerenes.
(Sébastien Goeb, Sébastien Bivaud, Vincent Croué, Marc Sallé)
a) Metal Directed Self-Assembly
The team is interested in the preparation of tetrathiafulvalene (TTF)-based fibers, xerogels and electroactive organogels. These polyfunctional systems associate the structuring and cooperative character of several functions on the periphery of the TTF skeleton, with the conductive properties of the latter.
c) Polymer films for optical storage applications
La photodimérisation réversible de dérivés de la coumarine est exploitée dans la préparation de films minces autorisant une impression et une lecture avec une haute définition, spécifiquement assistées par une technique optique non-linéaire SHG (génération de second harmonique) en vue d’un stockage 3D d’informations (collaboration Equipe Minos, UMR CNRS 6200, Angers).
(Esmah Belhadj, Yohan Cotelle, Piétrick Hudhomme, Marc Sallé)
a) Redox-switchable receptors, dynamic receptors, molecular switches
The tetrathiafulvalene unit and its derivatives present remarkable redox properties, which have positioned this unit as a key component of a number of redox-switchable molecular or supramolecular architectures. These properties are used in the synthesis of new redox ligands capable to sense various charged (cations, anions) or neutral substrates, in the preparation of molecular switches associating electro and photochemical properties, or in the elaboration of systems allowing a control over the molecular shape through an appropriate stimulus.
b) Molecular clips
The development of molecular machines prone to generate reversible controllable recognition processes constitutes a challenge difficult to achieve in the case of neutral molecules. Our activity addresses the synthesis of molecular clips integrating electroactive walls (tetrathiafulvalene unit) and presenting a good affinity for neutral substrates through donor-acceptor interactions.
The fullerene C60 is currently the best acceptor material for use in organic solar cells. On this ground, our activity focuses on its functionalization in order to optimize its electronic properties. In addition, new directions for organic photovoltaics are developed with the grafting of light-harvesting antenna on the fullerene moiety and, on the other hand with the functionalization of carbon nanotubes in order to reach processable materials.
Ionic Liquid Supported Organotin Reagents: new effective tools for the organic synthesis
(Stéphanie Legoupy, Djibril Faye)
Organostannic derivatives are known for their strong toxicity and the current challenge consists in avoiding any contamination by stannic residues when these derivatives are used. We are therefore interested in the synthesis and the reactivity of new organotin reagents and catalysts supported on ionic liquids. Covalent binding of these species to the support avoided any rejection of toxic substrate (tin residual in final products < 6 ppm). Furthermore, in a context of green chemistry, it is possible at the end of reaction to recycle organotin reagents supported on ionic liquids without loss of reactivity.