Self-assembly and luminescence of trinuclear lanthanide based supramolecular circular helicates.
Fei-Fan ChangFan-da FengJiao GengWei HuangPublished in: Chemical communications (Cambridge, England) (2021)
A series of trinuclear lanthanide circular helicates [Ln3L3]Cl3 have been synthesized via supramolecular subcomponent self-assembly. Photophysical studies demonstrate that the unique helical bis-tetradentate 1,29-dialdehyde ligand L2- could serve as an effective sensitizer for SmIII, EuIII, NdIII and YbIII ions exhibiting efficient characteristic fluorescence emission because of the shell-type blocking of the ligand, which makes them the first circular helicates exhibiting near-infrared lanthanide fluorescence.