Volume 133, Issue 9 pp. 4755-4761
Forschungsartikel

Molecular Cages Self-Assembled by Imine Condensation in Water

Ye Lei

Ye Lei

Department of Chemistry, Zhejiang University, Hangzhou, 310027 China

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Qiong Chen

Qiong Chen

Department of Chemistry, Zhejiang University, Hangzhou, 310027 China

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Peiren Liu

Peiren Liu

Department of Chemistry, Zhejiang University, Hangzhou, 310027 China

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Lingxiang Wang

Lingxiang Wang

Department of Chemistry, Zhejiang University, Hangzhou, 310027 China

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Hongye Wang

Hongye Wang

Department of Chemistry, Zhejiang University, Hangzhou, 310027 China

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Bingda Li

Bingda Li

Department of Chemistry, Zhejiang University, Hangzhou, 310027 China

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Xingyu Lu

Xingyu Lu

Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, Instrumentation and Service Centre for Molecular Sciences, Westlake University, Hangzhou, 310024 China

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Zhong Chen

Zhong Chen

Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, Instrumentation and Service Centre for Molecular Sciences, Westlake University, Hangzhou, 310024 China

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Prof. Yuanjiang Pan

Prof. Yuanjiang Pan

Department of Chemistry, Zhejiang University, Hangzhou, 310027 China

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Prof. Feihe Huang

Prof. Feihe Huang

Department of Chemistry, Zhejiang University, Hangzhou, 310027 China

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Prof. Hao Li

Corresponding Author

Prof. Hao Li

Department of Chemistry, Zhejiang University, Hangzhou, 310027 China

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First published: 30 November 2020
Citations: 26

Abstract

Self-assembly by imine condensation in aqueous media is a formidable task because of the labile nature of imines in the presence of water. Here, by taking advantage of multivalence and ligand preorganization, basket-shaped triscationic cage molecules are self-assembled in high yields in both water and organic solvent, by condensing a hexaformyl and bisamine. These cages, especially the chiral ones, are stable or inert in aqueous solution, that is, no decomposition was observed upon dilution, precipitation, or exposure to competitive amines or aldehydes. Such water-compatibility allows the hosts to take advantage of the hydrophobic effect to accommodate hydrophobic guests. The chiral cage S-23+ selectively binds and distinguishes one of two enantiomers, opening up opportunities for applications such as chiral compound separation. Chiral narcissistic self-sorting and sergeants-and-soldiers effects occur during cage formation when two amino precursors are involved in self-assembly.

Conflict of interest

The authors declare no conflict of interest.

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