Helical donor-acceptor platinum complexes displaying dual luminescence and near-infrared circularly polarized luminescence

Pablo Vazquez-Dominguez (1) , Oceane Journaud (2) , Nicolas Vanthuyne (3) , Denis Jacquemin (4) , Ludovic Favereau (2) , Jeanne Crassous (2) , Abel Ros (1)

1 CSIC - Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain]
2 ISCR - Institut des Sciences Chimiques de Rennes
3 ISM2 - Institut des Sciences Moléculaires de Marseille
4 CEISAM - Chimie Et Interdisciplinarité : Synthèse, Analyse, Modélisation

A series of chiral platina[5]helicenes displaying dual luminescence, i.e., fluorescence between 450 and 600 nm and red/NIR phosphorescence between 700 and 900 nm, has been synthesised, characterised and studied by first-principle calculations. This unusual behavior has been attributed to limited electronic interactions between the d orbitals of the metal and the pi-orbitals of the organic ligand on the excited-state. Accordingly, the electron richness of the donor group on the helical ligand does not affect the energy of the phosphorescence process but does play a role on its efficiency. Interestingly, near-infrared circularly polarized luminescence can be obtained for the three complexes with dissymmetry factors up to 3 x 10(-3) at 750 nm.

Domaines: Chimie

Pablo Vazquez-Dominguez, Oceane Journaud, Nicolas Vanthuyne, Denis Jacquemin, Ludovic Favereau, et al.. Helical donor-acceptor platinum complexes displaying dual luminescence and near-infrared circularly polarized luminescence. Dalton Transactions, 2021, 50 (38), pp.13220-13226. ⟨10.1039/d1dt02184b⟩. ⟨hal-03367783⟩