Speaker
Description
Recent years have seen a renewed interest in circularly polarized luminescence (CPL), the emission asymmetry observed with luminescent chiral molecules. These studies are driven by potential applications, such as bioprobes for microscopy or optimized dyes for current displays, and by the widespread availability of CPL spectrophotometers. While chiral lanthanide(III) complexes are considered the most promising emitters, displaying record dissymmetry factors (glum) and good quantum yields, there is a need for fundamental studies on model compounds to determine the impact of the chemical structure and experimental conditions on the observed CPL properties.
In recent years, a collaborative effort involving molecular engineering, computational chemistry and instrumental development has allowed us to obtained first results on a series of helical Ln(III) complex.1,2 Our studies have highlighted the influence of temperature and spectrometer parameters on the measured glum.3.4 We think these results should prompt our community to reevaluate the procedures and the metrics used to quantify the performance of Ln complexes among other CPL emitters.
[1] F. Gendron, S. D. Pietro, L. A. Galán, F. Riobé, V. Placide, L. Guy, F. Zinna, L. D. Bari, A. Bensalah- Ledoux, Y. Guyot, G. Pilet, F. Pointillart, B. Baguenard, S. Guy, O. Cador, O. Maury, B. L. Guennic, Inorg. Chem. Front. 2021, 8, 914.
[2] B. Baguenard, A. Bensalah-Ledoux, L. Guy, F. Riobé, O. Maury, S. Guy, Nat. Commun 2023, 14, 1065.
[3] A. Sickinger, M. Grasser, B. Baguenard, A. Bensalah-Ledoux, L. Guy, A. T. Bui, Y. Guyot, V. Dorcet, F. Pointillart, O. Cador, S. Guy, O. Maury, B. L. Guennic, F. Riobé, ChemRxiv, 2023, DOI: 10.26434/chemrxiv-2023-8z10s.
[4] A. Sickinger, B. Baguenard, A. Bensalah-Ledoux, Y. Guyot, L. Guy, F. Pointillart, O. Cador, M. Grasser, B. L. Guennic, F. Riobé, O. Maury, S. Guy, ChemRxiv, 2024, doi:10.26434/chemrxiv-2024- btdfk
