Volume 133, Issue 12 pp. 6818-6825
Forschungsartikel

Adaptive Chirality of an Achiral Cucurbit[8]uril-Based Supramolecular Organic Framework for Chirality Induction in Water

Yawen Li

Yawen Li

Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710069 P. R. China

These authors contributed equally to this work.

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Qingfang Li

Qingfang Li

Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710069 P. R. China

These authors contributed equally to this work.

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Dr. Xiaran Miao

Dr. Xiaran Miao

Shanghai Synchrotron Radiation Facility of Zhangjiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204 P. R. China

These authors contributed equally to this work.

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Chunyan Qin

Chunyan Qin

Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710069 P. R. China

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Dr. Dake Chu

Dr. Dake Chu

Department of Gastroenterology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061 P. R. China

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Prof. Liping Cao

Corresponding Author

Prof. Liping Cao

Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710069 P. R. China

State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 P. R. China

Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, 510640 P. R. China

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First published: 01 December 2020
Citations: 24

Abstract

Chiral framework materials have been developed for many applications including chiral recognition, chiral separation, asymmetric catalysis, and chiroptical materials. Herein, we report that an achiral cucurbit[8]uril-based supramolecular organic framework (SOF-1) with the dynamic rotational conformation of tetraphenylethene units can exhibit adaptive chirality to produce M-SOF-1 or P-SOF-1 with mirror-image circular dichroism (CD) with gabs≈±10−4 and circularly polarized luminescence (CPL) with glum≈±10−4 induced by L-/D-phenylalanine in water, respectively. The chirality induction in CD (gabs≈−10−4) and CPL (glum≈−10−4) of P-SOF-1 from achiral SOF-1 can be presented by using a small amount of adenosine-5′-triphosphate disodium (ATP) or adenosine-5′-diphosphate disodium (ADP) (only 0.4 equiv) in water. Furthermore, the adaptive chirality of SOF-1 can be used to determine dipeptide sequences (e.g., Phe-Ala and Ala-Phe) and distinguish polypeptides/proteins (e.g., somatostatin and human insulin) with characteristic CD spectra. Therefore, achiral SOF-1 as an ideal chiroptical platform with adaptive chirality may be applied to determine the enantiopurity of amino acids (e.g., L-/D-phenylalanine), develop aqueous CPL materials, and distinguish biological chiral macromolecules (e.g., peptides/proteins) via chirality induction in water.

Conflict of interest

The authors declare no conflict of interest.

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