Stereospecific supramolecular polymerization of nanoclusters into ultra-long helical chains and enantiomer separation

Zexi Zhu, Guohua Zhang, Bao Li, Minghua Liu () and Lixin Wu ()
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Zexi Zhu: Jilin University
Guohua Zhang: Jilin University
Bao Li: Jilin University
Minghua Liu: Chinese Academy of Sciences
Lixin Wu: Jilin University

Nature Communications, 2024, vol. 15, issue 1, 1-13

Abstract: Abstract During the construction of supramolecular polymers of smaller nanoparticles/nanoclusters bearing hierarchy and homochirality, the mechanism understanding via intuitive visualization and precise cross-scale chirality modulation is still challenging. For this goal, a cooperative self-assembly strategy is here proposed by using ionic complexes with uniform chemical composition comprising polyanionic nanocluster cores and surrounded chiral cationic organic components as monomers for supramolecular polymerization. The single helical polymer chains bearing a core-shell structure at utmost length over 20 μm are demonstrated showing comparable flexibility resembling covalent polymers. A nucleation-elongation growth mechanism that is not dealt with in nanoparticle systems is confirmed to be accompanied by strict chiral self-sorting. A permeable membrane prepared by simple suction of such supramolecular polymers displays high enantioselectivity (e.e. 98% after four runs) for separating histidine derivatives, which discloses a benefiting helical chain structure-induced functionalization for macroscopic supramolecular materials in highly efficient racemate separation.

Date: 2024
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DOI: 10.1038/s41467-024-52402-6

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