Abstract
Self-assembled supramolecular lanthanide constructs have great potential in luminescent bioprobes/sensors. Stereoselectivity on the lanthanide assemblies is needed to facilitate chiroptical probes and sensors. Herein we report the stereocontrolled synthesis of M2L3-type (M=metal ion, L=organic ligand) lanthanide triple-helicates using a chiral-induction strategy, where the periphery point-chirality [(R,R) or (S,S)] of the organic ligands was transferred into the metal centered chirality (ΔΔ or ΛΛ), thus leading to the formation of topological chiral (P or M) helicates. Moreover, commercially available Δ-TRISPHAT proved to be an effective NMR chiral resolving agent to differentiate between the two enantiomers of the helicate.
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