Description du projet
Pourquoi les molécules chirales agissent-elles comme des filtres à spin électronique?
Les molécules chirales présentent deux symétries différentes, à l’instar de votre main droite et de votre main gauche, qu’on appelle énantiomères. Lorsqu’ils se déplacent dans des molécules chirales, les électrons se comportent comme s’ils étaient soumis à un champ magnétique. Ce champ interagit avec leur spin: lorsqu’un électron est transféré à travers des molécules chirales, un spin est préféré à l’autre, en fonction de la chiralité des molécules et de la direction du mouvement de l’électron. Cette sélectivité de spin induite par la chiralité a des implications importantes pour la chimie, permettant notamment un meilleur contrôle des réactions énantiosélectives et une séparation plus facile des énantiomères. Financé par le programme Actions Marie Skłodowska-Curie, le projet CISSE mettra en place des collaborations interdisciplinaires entre différents chercheurs européens, américains et israéliens en vue d’étudier les mécanismes à l’origine de cet effet.
Objectif
Chirality is often considered as a structural properties of molecules, but the concept also applies to elementary particles having a non-zero spin, i.e. electrons at rest are achiral but they acquire a helicity (chirality) in the direction of motion. Consequently, electrons are filtered according to their spin when crossing chiral materials. This newly uncovered chiral-induced spin selectivity (CISS) effect is surprisingly large. Spin polarization up to 100% has been demonstrated paving the way to multiple applications in chemistry, such as improved control of enantioselective reactions and easier separation of enantiomers. Impacts are also expected in physics (spintronics) and biology (molecular recognition of biomolecules, origin of bio-homo-chirality, magnetic compass of migratory songbirds). CISS effect is theoretically ill-defined. Sound structure-property relationship lacks also for the link between molecule chirality and CISS effect magnitude. CISSE proposal intends to contribute to a giant leap forward in the knowledge of CISS effect by putting together some of the best European, American and Israeli experts of the field, who will work towards its fundamental understanding. To this end, members of the CISSE consortium have been selected for their expertise and complementarities encompassing: synthetic chemistry, electrochemistry, surface science, bio-physical chemistry, quantum chemistry, nanoscience, industrial processes, analytical chemistry, and scientific instrument developments. Importantly, some beneficiaries have filled the first patent applications on CISS effect and have started to valorize them. Considerable scope for new discoveries and invention remains because the field of CISS effect is still in its infancy. The topic is particularly suited to educate ESRs because of its novelty and potential. To gain a different perspective on their research activities, ESRs will also contribute to an artistic creation highlighting spin and chirality.
Champ scientifique
Programme(s)
- HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA) Main Programme
Régime de financement
HORIZON-TMA-MSCA-DN - HORIZON TMA MSCA Doctoral NetworksCoordinateur
1050 Bruxelles / Brussel
Belgique