Modulation of Chiroptical and Photophysical Properties in Helicenic Rhenium(I) Systems: The Use of an N-(Aza[6]helicenyl)-NHC Ligand

Etienne S Gauthier; Laura Abella; Elsa Caytan; Thierry Roisnel; Nicolas Vanthuyne; Ludovic Favereau; Monika Srebro-Hooper; J A Gareth Williams; Jochen Autschbach; Jeanne Crassous

doi:10.1002/chem.202203477

Modulation of Chiroptical and Photophysical Properties in Helicenic Rhenium(I) Systems: The Use of an N-(Aza[6]helicenyl)-NHC Ligand

Chemistry. 2023 Apr 13;29(21):e202203477. doi: 10.1002/chem.202203477. Epub 2023 Mar 10.

Affiliations

¹ Univ Rennes, CNRS, ISCR -, UMR 6226, 35000, Rennes, France.
² Department of Chemistry, University at Buffalo, State University of New York, 14260, Buffalo, New York, USA.
³ Aix Marseille University, CNRS Centrale Marseille, iSm2, 13284, Marseille, France.
⁴ Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Krakow, Poland.
⁵ Department of Chemistry, Durham University, DH1 3LE, Durham, UK.

PMID: 36645138
DOI: 10.1002/chem.202203477

Abstract

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: N-heterocyclic carbene; circularly polarized emission; density functional calculations; helicene; long-lived phosphorescence; rhenium(I).

Grants and funding

S10 OD024973/OD/NIH HHS/United States