Emilien HUSSON PhD defense
Supramolecular π-functionnal architectures in bisphosphonium and merocyanine series
Friday 19 September, 09:00Passed
Organometallics: Materials & Catalysis (OMC) team
Abstract
This thesis manuscript falls within the field of supramolecular chemistry applied to π-functional architectures. It explores two complementary approaches. The first focuses on the stabilization of planar polyaromatic bisphosphoniums, which are fluorescent electroactive compounds, within mechanically interlocked structures such as rotaxanes. This encapsulation aims to extend the lifetime of the reduced species of these bisphosphoniums. A series of electron-rich macrocycle precursors were prepared but did not show molecular recognition in solution toward the bisphosphonium axles. Our expertise in bisphosphonium synthesis was also leveraged for the design of helical bisphosphoniums, known as phosphonium helicenes. The helical structure of these compounds gives to their enantiopure forms chiroptical properties, notably circularly polarized luminescence.
The second part of this work is dedicated to the modulation of the spectroscopic properties of foldamers through self-assembly into double helices. Two complementary foldamers based on oligopyridine-dicarboxamides grafted with merocyanines were synthesized. This multidisciplinary study aims at the design of smart, functional materials with potential applications in organic electronics, photonics, or bioimaging.
Jury
Laure Guy, Ingénieure de Recherche, ENS Lyon / Reporter
Yoann Cotelle, Maître de Conférences, Aix-Marseille Université / Reporter
Dominique Lorcy, Professeure des Universités, Université de Rennes / Examiner
Pierre-Antoine Bouit, Directeur de Recherche CNRS, Université de Rennes / PhD Supervisor
David Canevet, Professeur des Universités, Université d’Angers / PhD Supervisor
Contact
Pierre-Antoine Bouit, pierre-antoine.bouit@univ-rennes.fr
