We report the synthesis of visibly-emissive lanthanide complexes supported by enantiopure N,N’-bis(methylbipyridyl)bipyrrolidine and subsequent luminescence studies. Complexes of this ligand with visibly emissive lanthanides Sm, Eu, Tb, and Dy are luminescent (Φf ≤ 0.32) and demonstrate strong preferential emission of circularly polarized light in each case (|glum| ≤ 0.26). Notably, all four possess at least one transition with |glum| &gt; 0.2, demonstrating the ligand’s ability to enforce a chiral geometry while remaining adaptable to changes in metal size. Additionally, the strongest preferential emission is measured from the complexes of Sm and Dy; examples of strong circularly polarized light from these metals remain rare.

Synthesis of lanthanide complexes supported by enantiopure hexadentate N,N’-bis(methylbipyridyl)bipyrrolidine and their circularly polarized luminescence

ACS Spring 2022

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