Biomimetic chiral hydrogen-bonded organic-inorganic frameworks

Jun Guo (), Yulong Duan, Yunling Jia, Zelong Zhao, Xiaoqing Gao, Pai Liu, Fangfang Li, Hongli Chen, Yutong Ye, Yujiao Liu, Meiting Zhao (), Zhiyong Tang () and Yi Liu ()
Additional contact information
Jun Guo: Tiangong University
Yulong Duan: Tiangong University
Yunling Jia: Tiangong University
Zelong Zhao: Tiangong University
Xiaoqing Gao: University of Chinese Academy of Sciences
Pai Liu: Tiangong University
Fangfang Li: Tiangong University
Hongli Chen: Tiangong University
Yutong Ye: Tiangong University
Yujiao Liu: Tiangong University
Meiting Zhao: Tianjin University
Zhiyong Tang: National Center for Nanoscience and Technology
Yi Liu: Tiangong University

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Assembly ubiquitously occurs in nature and gives birth to numerous functional biomaterials and sophisticated organisms. In this work, chiral hydrogen-bonded organic-inorganic frameworks (HOIFs) are synthesized via biomimicking the self-assembly process from amino acids to proteins. Enjoying the homohelical configurations analogous to α-helix, the HOIFs exhibit remarkable chiroptical activity including the chiral fluorescence (glum = 1.7 × 10−3) that is untouched among the previously reported hydrogen-bonded frameworks. Benefitting from the dynamic feature of hydrogen bonding, HOIFs enable enantio-discrimination of chiral aliphatic substrates with imperceivable steric discrepancy based on fluorescent change. Moreover, the disassembled HOIFs after recognition applications are capable of being facilely regenerated and self-purified via aprotic solvent-induced reassembly, leading to at least three consecutive cycles without losing the enantioselectivity. The underlying mechanism of chirality bias is decoded by the experimental isothermal titration calorimetry together with theoretic simulation.

Date: 2024
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DOI: 10.1038/s41467-023-43700-6

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