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Su Y, Otake KI, Zheng JJ, Xu H, Wang Q, Liu H, Huang F, Wang P, Kitagawa S, Gu C. Switching molecular recognition selectivities by temperature in a diffusion-regulatory porous material. Nat Commun 2024; 15:144. [PMID: 38168057 PMCID: PMC10761840 DOI: 10.1038/s41467-023-44424-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 12/13/2023] [Indexed: 01/05/2024] Open
Abstract
Over the long history of evolution, nature has developed a variety of biological systems with switchable recognition functions, such as the ion transmissibility of biological membranes, which can switch their ion selectivities in response to diverse stimuli. However, developing a method in an artificial host-guest system for switchable recognition of specific guests upon the change of external stimuli is a fundamental challenge in chemistry because the order in the host-guest affinity of a given system hardly varies along with environmental conditions. Herein, we report temperature-responsive recognition of two similar gaseous guests, CO2 and C2H2, with selectivities switched by temperature change by a diffusion-regulatory mechanism, which is realized by a dynamic porous crystal featuring ultrasmall pore apertures with flip-flop locally-motive organic moiety. The dynamic local motion regulates the diffusion process of CO2 and C2H2 and amplifies their rate differences, allowing the crystal to selectively adsorb CO2 at low temperatures and C2H2 at high temperatures with separation factors of 498 (CO2/C2H2) and 181 (C2H2/CO2), respectively.
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Affiliation(s)
- Yan Su
- State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Ken-Ichi Otake
- Institute for Integrated Cell-Material Sciences, Kyoto University, Kyoto, 606-8501, Japan
| | - Jia-Jia Zheng
- Laboratory of Theoretical and Computational Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Hong Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P. R. China
| | - Qing Wang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, P. R. China
| | - Haiming Liu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, P. R. China
| | - Fei Huang
- ReadCrystal Biotech Co., Ltd., Suzhou, 215505, P. R. China
| | - Ping Wang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Susumu Kitagawa
- Institute for Integrated Cell-Material Sciences, Kyoto University, Kyoto, 606-8501, Japan.
| | - Cheng Gu
- State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou, 510640, P. R. China.
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China.
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