Modulation of chiroptical and photophysical properties in helicenic rhenium(I) systems: the use of an N-(aza[6]helicenyl)-NHC ligand

Etienne S. Gauthier (1) , Laura Abella (2) , Elsa Caytan (1) , Thierry Roisnel (1) , Nicolas Vanthuyne (3, 4) , Ludovic Favereau (1) , Monika Srebro-Hooper (5) , J. A. Gareth Williams (6) , Jochen Autschbach (2) , Jeanne Crassous (1)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 SUNY Buffalo - University at Buffalo [SUNY]
3 AMU - Aix Marseille Université
4 ChiroSciences
5 UJ - Uniwersytet Jagielloński w Krakowie = Jagiellonian University
6 Durham University

The photophysical and chiroptical properties of a novel, chiral helicene-NHC-Re(I) complex bearing an N-(aza[6]helicenyl)-benzimidazolylidene ligand are described, showing its ability to emit yellow circularly polarized luminescence. A comparative analysis of this new system with other helicene-Re(I) complexes reported to date illustrates the impact of structural modifications on the emissive and absorptive properties.

Keywords: Density functional calculations; Re(I)-N-heterocyclic carbene; circularly polarized emission; helicene; long-lived phosphorescence

Domains: Chemical Sciences

Etienne S. Gauthier, Laura Abella, Elsa Caytan, Thierry Roisnel, Nicolas Vanthuyne, et al.. Modulation of chiroptical and photophysical properties in helicenic rhenium(I) systems: the use of an N-(aza[6]helicenyl)-NHC ligand. Chemistry - A European Journal, 2023, ⟨10.1002/chem.202203477⟩. ⟨hal-03971868⟩