Cation-induced chirality in a bifunctional metal-organic framework for quantitative enantioselective recognition

Zongsu Han, Kunyu Wang, Yifan Guo, Wenjie Chen, Jiale Zhang, Xinran Zhang, Giuliano Siligardi, Sihai Yang, Zhen Zhou, Pingchuan Sun, Wei Shi () and Peng Cheng
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Zongsu Han: Nankai University
Kunyu Wang: Nankai University
Yifan Guo: Nankai University
Wenjie Chen: Nankai University
Jiale Zhang: Nankai University
Xinran Zhang: University of Manchester
Giuliano Siligardi: Harwell Science Campus
Sihai Yang: University of Manchester
Zhen Zhou: Nankai University
Pingchuan Sun: Nankai University
Wei Shi: Nankai University
Peng Cheng: Nankai University

Nature Communications, 2019, vol. 10, issue 1, 1-7

Abstract: Abstract The integration of luminescence and chirality in easy-scalable metal-organic frameworks gives rise to the development of advanced luminescent sensors. To date, the synthesis of chiral metal-organic frameworks is poorly predictable and their chirality primarily originates from components that constitute the frameworks. By contrast, the introduction of chirality into the pores of metal-organic frameworks has not been explored to the best of our knowledge. Here, we demonstrate that chirality can be introduced into an anionic Zn-based metal-organic framework via simple cation exchange, yielding dual luminescent centers comprised of the ligand and Tb3+ ions, accompanied by a chiral center in the pores. This bifunctional material shows enantioselectivity luminescent sensing for a mixture of stereoisomers, demonstrated for Cinchonine and Cinchonidine epimers and amino alcohol enantiomers, from which the quantitative determination of the stereoisomeric excess has been obtained. This study paves a pathway for the design of multifunctional metal-organic framework systems as a useful method for rapid sensing of chiral molecules.

Date: 2019
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DOI: 10.1038/s41467-019-13090-9

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