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Sorting Phenomena and Chirality Transfer in Fluoride-Bridged Macrocyclic Rare Earth Complexes
Katarzyna Ślepokura1, Trevor A Cabreros2, Gilles Muller2
1Department of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland.
Inorganic Chemistry
|November 17, 2021
Summary
Fluoride anions react with lanthanide(III) and yttrium(III) macrocyclic complexes to form dinuclear fluoride-bridged structures. Chirality influences self-recognition and sorting of macrocyclic units, enabling chirality transfer.
Area of Science:
- Coordination Chemistry
- Supramolecular Chemistry
- Inorganic Chemistry
Background:
- Lanthanide(III) and yttrium(III) complexes with macrocyclic ligands are key in coordination chemistry.
- Fluoride bridging can create unique dinuclear structures.
Purpose of the Study:
- To investigate the reaction of fluoride anions with mononuclear lanthanide(III) and yttrium(III) hexaaza-macrocyclic complexes.
- To explore the influence of macrocycle chirality on the formation and properties of dinuclear complexes.
Main Methods:
- X-ray crystallography to determine complex structures.
- Spectroscopic methods (CPL and CD) to analyze chirality.
Main Results:
- Dinuclear fluoride-bridged complexes are formed, with 2 or 3 bridging fluorides depending on the macrocycle.
- Chiral macrocycles L1 and L2 show different self-recognition behaviors.
- Narcissistic and sociable sorting of macrocyclic units were observed with mixed macrocycles.
- Chirality transfer from L1 to achiral L3 was confirmed.
Conclusions:
- Fluoride bridging is a versatile strategy for constructing dinuclear lanthanide/yttrium complexes.
- Macrocycle chirality plays a critical role in self-recognition and sorting phenomena.
- Chirality transfer in heterodinuclear complexes opens avenues for chiral material design.
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