Switching molecular recognition selectivities by temperature in a diffusion-regulatory porous material.

Autor: Su Y; 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., Otake KI; Institute for Integrated Cell-Material Sciences, Kyoto University, Kyoto, 606-8501, Japan., Zheng JJ; Laboratory of Theoretical and Computational Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing, 100190, P. R. China., Xu H; Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P. R. China., Wang Q; School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, P. R. China., Liu H; School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, P. R. China., Huang F; ReadCrystal Biotech Co., Ltd., Suzhou, 215505, P. R. China., Wang P; College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China., Kitagawa S; Institute for Integrated Cell-Material Sciences, Kyoto University, Kyoto, 606-8501, Japan. kitagawa@icems.kyoto-u.ac.jp., Gu C; 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. gucheng@scu.edu.cn.; College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China. gucheng@scu.edu.cn.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Jan 02; Vol. 15 (1), pp. 144. Date of Electronic Publication: 2024 Jan 02.
DOI: 10.1038/s41467-023-44424-3
Abstrakt: 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, CO 2 and C 2 H 2 , 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 CO 2 and C 2 H 2 and amplifies their rate differences, allowing the crystal to selectively adsorb CO 2 at low temperatures and C 2 H 2 at high temperatures with separation factors of 498 (CO 2 /C 2 H 2 ) and 181 (C 2 H 2 /CO 2 ), respectively.
(© 2024. The Author(s).)
Databáze: MEDLINE
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