Increased CO2/N2 selectivity by stepwise fluorination in isoreticular ultramicroporous metal–organic frameworks†

IF 7.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Chemical Science Pub Date : 2024-05-16 DOI:10.1039/D4SC01525H

Tuo Di, Yukihiro Yoshida, Ken-ichi Otake, Susumu Kitagawa and Hiroshi Kitagawa

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Abstract

Exploration of porous adsorbents with high CO₂/N₂ selectivity is of great significance for reducing CO₂ content in the atmosphere. In this study, a series of isoreticular ultramicroporous fluorinated metal–organic frameworks (MOFs) were prepared to explore the benefits of fluorinated ultramicropores in improving CO₂/N₂ selectivity. Gas adsorption measurements revealed that the increase in the number of fluorine atoms in a ligand molecule leads to the increased CO₂ uptakes and CO₂/N₂ selectivity. Theoretical calculations indicate that the interaction between the fluorine atoms and adsorbed CO₂ molecules enhances the CO₂-philicity, offering useful insight into the improvement of CO₂/N₂ selectivity in isoreticular frameworks.

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在等孔超微多孔金属有机框架中通过逐步氟化提高 CO2/N2 选择性

探索具有高 CO2/N2 选择性的多孔吸附剂对于降低大气中的 CO2 含量具有重要意义。本研究制备了一系列等孔超微孔含氟金属有机框架（MOFs），以探索含氟超微孔在提高 CO2/N2 选择性方面的优势。气体吸附测量结果表明，配体分子中氟原子数的增加会导致二氧化碳吸附量和二氧化碳/N2 选择性的增加。理论计算表明，氟原子与吸附的 CO2 分子之间的相互作用增强了 CO2 亲和性，这为提高等核框架的 CO2/N2 选择性提供了有益的启示。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemical Science CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

14.40

自引率

4.80%

发文量

1352

审稿时长

2.1 months

期刊介绍： Chemical Science is a journal that encompasses various disciplines within the chemical sciences. Its scope includes publishing ground-breaking research with significant implications for its respective field, as well as appealing to a wider audience in related areas. To be considered for publication, articles must showcase innovative and original advances in their field of study and be presented in a manner that is understandable to scientists from diverse backgrounds. However, the journal generally does not publish highly specialized research.