Opening of an Accessible Microporosity in an Otherwise Nonporous Metal-Organic Framework by Polymeric Guests

Journal of the American Chemical Society
Benjamin Le OuayTakashi Uemura

Abstract

The development of highly porous metal-organic frameworks (MOFs) is greatly sought after, due to their wide range of applications. As an alternative to the development of new structures, we propose to obtain new stable configurations for flexible MOFs by insertion of polymeric guests. The guests prevent the otherwise spontaneous closing of the host frameworks and result in stable opened forms. Introduced at a fraction of the maximal capacity, polymer chains cause an opening of the occupied nanochannels, and because of the MOF reticular stiffness, this opening is propagated to the neighboring nanochannels that become accessible for adsorption. Composites were obtained by in situ polymerization of vinyl monomers in the nanochannels of an otherwise nonporous MOF, resulting in homogeneously loaded materials with a significant increase of porosity (SBET = 920 m2/g). In addition, by limiting the accessible configurations for the framework and forbidding the formation of a reactive intermediate, the polymeric guest prevented the thermal degradation of the host MOF even at very low loading (as low as 3 wt %) and increased its stability domain by more than 200 °C.

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Citations

Oct 6, 2018·Chemical Communications : Chem Comm·Qing-Qing ZhangShuang-Quan Zang
Jun 12, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Zhong-Jie WangHe-Gen Zheng
Mar 25, 2020·Chemical Science·Meili DingHai-Long Jiang
Jan 14, 2021·Chemistry : a European Journal·Wenjuan XuHongwei Hou
Mar 19, 2021·Chemical Communications : Chem Comm·Zhenyu JiMaochun Hong
Aug 31, 2019·Journal of the American Chemical Society·Benjamin Le OuayTakashi Uemura
Oct 12, 2019·Journal of the American Chemical Society·Mei-Hui YuXian-He Bu
Jul 19, 2019·Journal of the American Chemical Society·Li PengWendy L Queen
Apr 8, 2020·Journal of the American Chemical Society·Li ShaoJerry L Atwood

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