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Inside Back Cover: Integrated Soft Porosity and Electrical Properties of Conductive-on-Insulating Metal-Organic Framework Nanocrystals (Angew. Chem. Int. Ed. 35/2023) |
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| Authors: | Prof Ming-Shui Yao Prof Ken-ichi Otake Jiajia Zheng Masahiko Tsujimoto Dr Yi-Fan Gu Lu Zheng Dr Ping Wang Dr Shivanna Mohana Dr Mickaele Bonneau Tomoyuki Koganezawa Tetsuo Honma Hirotaka Ashitani Shogo Kawaguchi Prof Yoshiki Kubota Prof Susumu Kitagawa |
| Institution: | 1. Institute for Integrated Cell-Material Sciences, Kyoto University, Institute for Advanced Study, Kyoto University, Yoshida, Ushinomiya-cho, Sakyo-ku, Kyoto, 606-8501 Japan;2. Institute for Integrated Cell-Material Sciences, Kyoto University, Institute for Advanced Study, Kyoto University, Yoshida, Ushinomiya-cho, Sakyo-ku, Kyoto, 606-8501 Japan
College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Siping Road 1239, Shanghai, 200092 China;3. Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198 Japan;4. Department of Physical Science, Graduate School of Science, Osaka Prefecture University, Osaka, Japan;5. Department of Physical Science, Graduate School of Science, Osaka Prefecture University, Osaka, Japan Department of Physics, Graduate School of Science, Osaka Metropolitan University, Osaka, Japan |
| Abstract: | A one-stone, two-bird method to integrate the soft porosity and electrical properties of distinct metal–organic frameworks (MOFs) into a single material involves the design of conductive-on-insulating MOF (cMOF-on-iMOF) heterostructures that allow for direct electrical control. Herein, we report the synthesis of cMOF-on-iMOF heterostructures using a seeded layer-by-layer method, in which the sorptive iMOF core is combined with chemiresistive cMOF shells. The resulting cMOF-on-iMOF heterostructures exhibit enhanced selective sorption of CO2 compared to the pristine iMOF (298 K, 1 bar, S from 15.4 of ZIF-7 to 43.2–152.8). This enhancement is attributed to the porous interface formed by the hybridization of both frameworks at the molecular level. Furthermore, owing to the flexible structure of the iMOF core, the cMOF-on-iMOF heterostructures with semiconductive soft porous interfaces demonstrated high flexibility in sensing and electrical “shape memory” toward acetone and CO2. This behavior was observed through the guest-induced structural changes of the iMOF core, as revealed by the operando synchrotron grazing incidence wide-angle X-ray scattering measurements. |
| Keywords: | Conductivity Metal–Organic Frameworks Operando Shape Memory Soft Porosity |