Exciton coupling chirality in helicene-porphyrin conjugates

Kais Dhbaibi (1) , Paola Matozzo (1) , Laura Abella (2) , Marion Jean (3) , Nicolas Vanthuyne (3) , Jochen Autschbach (2) , Ludovic Favereau (1) , Jeanne Crassous (1, 4)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 SUNY Buffalo - University at Buffalo [SUNY]
3 ISM2 - Institut des Sciences Moléculaires de Marseille
4 ScanMAT - Synthèse Caractérisation Analyse de la Matière

Enantiopure helicene-porphyrin conjugates were prepared. They show strong changes in their circular dichroic response as compared to classical helicene derivatives, with highly intense bisignate Exciton Coupling (EC) signal and Δε values up to 680 M(-1) cm(-1) for the Soret band. They also display circularly polarized fluorescence in the (far-)red region, with dissymmetry factors up to 7 × 10(-4).

Domaines: Chimie

Kais Dhbaibi, Paola Matozzo, Laura Abella, Marion Jean, Nicolas Vanthuyne, et al.. Exciton coupling chirality in helicene-porphyrin conjugates. Chemical Communications, 2021, 57 (82), pp.10743-10746. ⟨10.1039/d1cc03314j⟩. ⟨hal-03369338v2⟩