Enantiopure trigonal bipyramidal coordination cages templated by in situ self-organized D2h-symmetric anions

Shan Guo, Wen-Wen Zhan, Feng-Lei Yang, Jie Zhou, Yu-Hao Duan, Dawei Zhang () and Yang Yang ()
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Shan Guo: Jiangsu Normal University
Wen-Wen Zhan: Jiangsu Normal University
Feng-Lei Yang: Jiangsu Normal University
Jie Zhou: Jiangsu Normal University
Yu-Hao Duan: Jiangsu Normal University
Dawei Zhang: East China Normal University
Yang Yang: Jiangsu Normal University

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract The control of a molecule’s geometry, chirality, and physical properties has long been a challenging pursuit. Our study introduces a dependable method for assembling D3-symmetric trigonal bipyramidal coordination cages. Specifically, D2h-symmetric anions, like oxalate and chloranilic anions, self-organize around a metal ion to form chiral-at-metal anionic complexes, which template the formation of D3-symmetric trigonal bipyramidal coordination cages. The chirality of the trigonal bipyramid is determined by the point chirality of chiral amines used in forming the ligands. Additionally, these cages exhibit chiral selectivity for the included chiral-at-metal anionic template. Our method is broadly applicable to various ligand systems, enabling the construction of larger cages when larger D2h-symmetric anions, like chloranilic anions, are employed. Furthermore, we successfully produce enantiopure trigonal bipyramidal cages with anthracene-containing backbones using this approach, which would be otherwise infeasible. These cages exhibit circularly polarized luminescence, which is modulable through the reversible photo-oxygenation of the anthracenes.

Date: 2024
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DOI: 10.1038/s41467-024-49964-w

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