@misc{10481/96866,
year = {2024},
month = {10},
url = {https://hdl.handle.net/10481/96866},
abstract = {A series of highly emissive inert and chiral CrIII complexes displaying positive and
negative circularly polarized luminescence (CPL) within the near-infrared (NIR)
region at room temperature have been prepared and characterized to decipher
the effect of ligand substitution on the photophysical properties, more
specifically on the chiroptical properties. The helical homoleptic [Cr(dqp-R)2]3+
(dqp = 2,6-di(quinolin-8-yl)pyridine; R = Ph, ≡-Ph, DMA, ≡-DMA (DMA = N,Ndimethylaniline))
and heteroleptic [Cr(dqp)(L)]3+ (L = 4-methoxy-2,6-di(quinolin-
8-yl)pyridine (dqp-OMe) or L = N2,N6-dimethyl-N2,N6-di(pyridin-2-yl)pyridine-
2,6-diamine (ddpd)) molecular rubies were synthesized as racemic mixtures and
then resolved and isolated into their respective pure PP and MM enantiomeric
forms by chiral stationary phase HPLC. The corresponding enantiomers show
two opposite polarized emission bands within the 700–780 nm range
corresponding to the characteristic metal-centered Cr(2E’→4A2) and
Cr(2T1
’→4A2) transitions with large glum ranging from 0.14 to 0.20 for the
former transition. In summary, this study reports the rational use of different
ligands on CrIII and their effect on the chiroptical properties of the complexes.},
organization = {Swiss National
Science Foundation (grant 200020_207313)},
organization = {Grant TED2021.129598A.I00 funded by MCIN/AEI/10.13039/
501100011033},
organization = {European Union NextGenerationEU/
PRTR},
organization = {Ministerio de Ciencia Innovación
y Universidades for a Ramón y Cajal contract (grant RYC 2022-
037255-I) funded by MCIN/AEI/10.13039/501100011033 and FSE+},
publisher = {Frontiers Media},
keywords = {chromium},
keywords = {chirality},
keywords = {emission},
keywords = {circularly polarized luminescence},
title = {Tuning the circularly polarized luminescence in homoleptic and heteroleptic chiral CrIII complexes},
doi = {10.3389/fchem.2024.1472943},
author = {Poncet, Maxime and Besnard, Céline and Guénée, Laure and Jiménez Gallego, Juan Ramón and Piguet, Claude},
}