Circularly polarised luminescence (CPL) control of oligopeptide-Eu(iii) hybridized luminophores by interaction with peptide side chains

Chiral oligopeptide-naphthalene/Eu(iii) hybridized luminophores emit strong circularly polarised solution-state luminescence (CPL) from Eu(iii) at 592 and 614 nm (|g (CPL)| ≤ 2.1 × 10(-2)). Although the peptide ligands have matching absolute configurations, the CPL sign is controllable by varying the number of naphthalene units and peptide/Eu(iii) coordination ratio.