Seminar Dr Jeanne Crassous

Dr Jeanne Crassous

CNRS – Univ. Rennes,
Institut des Sciences Chimiques de Rennes
ISCR – UMR 6226, F-35000 Rennes, France
E-mail: jeanne.crassous@univ-rennes.fr

Chirality and multifunctionality in helicene-based chemical platforms

Ortho-fused aromatic rings form helically shaped chiral molecules such as carbo[6]helicenes, that wind in a left-handed (M) or a right-handed (P) sense.¹ The helical topology combined with extended pi-conjugation provide helicenes with peculiar properties such as strong photophysical and chiroptical properties (high optical rotation values, intense electronic circular dichroism and circularly polarized emission). The molecular engineering of helicenes using organometallic and heteroaromatic chemistries offers a convenient way to tune the properties of these helically shaped pi-ligands. Indeed, their combination with metallic or organic assembling units leads to chiral materials with appealing properties (circularly polarized phosphorescence, magnetochirality, spin selectivity) for applications in materials science (Circularly Polarized OLEDs, Chiroptical Switches, Spintronics). I will present a set of representative examples.²

Références

1) a) Chen, C. -F.; Shen, Y. Helicenes Chemistry: From Synthesis to Applications. Springer, Berlin, 2017; b) Gingras, M. Chem. Soc. Rev. 2013, 42, 1051; c) Dhbaibi, K.; Favereau, L.; Crassous, J. Chem. Rev. 2019, 119, 8846; d) Crassous, J.; Stará, I. G.; Starý, I. (Eds) Helicenes – Synthesis, Properties and Applications. Wiley, 2022.

2) a) Gauthier, E. S.; Abella, L.; Hellou, N.; Darquié, B.; Caytan, E.; Roisnel, T.; Vanthuyne, N.; Favereau, L.; Srebro-Hooper, M.; Williams, J. A. G.; Autschbach, J.; Crassous, J. Angew. Chem. Int. Ed. 2020, 59, 8394; b) Dhbaibi, K.; Abella, L.; Meunier-Della-Gatta, S.; Roisnel, T.; Vanthuyne, N.; Jamoussi, B.; Pieters, G.; Racine, B.; Quesnel, E.; Autschbach, J.; Crassous, J.; Favereau, L. Chem. Sci. 2021, 12, 5522; c) Atzori, M.; Dhbaibi, K.; Douib, H.; Grasser, M.; Dorcet, V.; Breslavetz, I.; Paillot, K.; Cador, O.; Rikken, G. L. J. A.; Le Guennic, B.; Crassous, J.; Pointillart, F.; Train, C. J. Am. Chem. Soc. 2021, 143, 2671; d) Rodríguez, R.; Naranjo, C.; Kumar, A.; Matozzo, P.; Das, T.-K.; Zhu, Q.; Vanthuyne, N.; Gómez, R.; Naaman, R.; Sánchez, L.; Crassous, J. J. Am. Chem. Soc. 2022, 144, 7709 ; e) Dhbaibi, K.; Grasser, M.; Douib, H.; Dorcet, V.; Cador, O.; Vanthuyne, N.; Riobé, F.; Maury, O.; Guy, S.; Bensalah‐Ledoux, A.; Baguenard, B.; Rikken, G. L. J. A.; Train, C.; Le Guennic, B.; Atzori, M.; Pointillart, F.; Crassous, J. Angew. Chem. Int. Ed. 2023, 62, e202215558; f) Gedeon, C.; Del Rio, N.; Furlan, F.; Taddeucci, A.; Vanthuyne, N.; Gregoriou, V. G.; Fuchter, M. J.; Siligardi, G.; Gasparini, N.; Crassous, J.; Chochos, C. L. Adv. Mater. 2024, 2314337; g) S. Cadeddu, R. Chowdhury, C. Delpiano Cordeiro, S. Parmar, A. Kramer, M. Cordier, A. Pensel, N. Vanthuyne, R. Sessoli, M. Chiesa, Y.-K. Liao, R. H. Friend, E. Salvadori, J. Autschbach, J. Crassous, J. Am. Chem. Soc. 2025, 147, 23643.

Jeanne Crassous, winner of the CNRS Silver Medal 2023, is a research director at the Rennes Institute of Chemical Sciences, where she explores various aspects of chirality.
Photo ©JeanClaudeMOSCHETTI CNRSPhotothèque