Anion-Driven Circularly Polarized Luminescence Inversion of Unsymmetrical Europium(III) Complexes for Target Identifiable Sensing.

ABSTRACT: Anion-responsive sign inversion of circularly polarized luminescence (CPL) was successfully achieved by N₃O₆-type nona-coordinated europium(III) (Eu³⁺) complexes [(R)-1 and (S)-1] composed of a less-hindered unsymmetrical N₃-tridentate ligand (a chiral bis(oxazoline) ligand) and three O₂-chelating (β-diketonate) ligands. Here, (R)-1 exhibited a positive CPL signal (I_L - I_R > 0) at the ⁵D₀ → ⁷F₁ transition of Eu³⁺, which can be changed to a negative sign (i.e., I_L - I_R > 0 → I_L - I_R < 0) by the coordination of trifluoroacetic anions (C

SUBMITTER: Okayasu Y 

PROVIDER: S-EPMC9516667 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature