Amplified circularly polarized luminescence of chiral lanthanide-based chains through helical assembly†
Abstract
Accurately designing and controlling the synthesis of circularly polarized luminescent (CPL) materials with both large asymmetry factor (glum) and high quantum yield (Φlum) values is a key scientific challenge. In this study, chiral ligands and luminescent π-conjugated systems are utilized as mixed ligands to form chiral helical polymers R/S-Ln-phen (Ln = Eu/Tb) by the regulation of intramolecular and intermolecular interactions. This approach aims to amplify the chirality and enhance luminescence efficiency. The compounds R/S-Eu-phen and R/S-Tb-phen demonstrated extremely high Φlum (86.88% for R/S-Eu-phen and 88.93% for R/S-Tb-phen) and relatively large glum (≈10−3) values.
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