Volume 62, Issue 35 e202303903
Research Article

Integrated Soft Porosity and Electrical Properties of Conductive-on-Insulating Metal-Organic Framework Nanocrystals

Prof. Ming-Shui Yao

Prof. Ming-Shui Yao

Institute for Integrated Cell-Material Sciences, Kyoto University, Institute for Advanced Study, Kyoto University, Yoshida, Ushinomiya-cho, Sakyo-ku, Kyoto, 606-8501 Japan

State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Zhongguancun Beiertiao No. 1, Haidian District, Beijing, 100190 China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049 China

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Prof. Ken-ichi Otake

Corresponding Author

Prof. Ken-ichi Otake

Institute for Integrated Cell-Material Sciences, Kyoto University, Institute for Advanced Study, Kyoto University, Yoshida, Ushinomiya-cho, Sakyo-ku, Kyoto, 606-8501 Japan

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Jiajia Zheng

Jiajia Zheng

Institute for Integrated Cell-Material Sciences, Kyoto University, Institute for Advanced Study, Kyoto University, Yoshida, Ushinomiya-cho, Sakyo-ku, Kyoto, 606-8501 Japan

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Masahiko Tsujimoto

Masahiko Tsujimoto

Institute for Integrated Cell-Material Sciences, Kyoto University, Institute for Advanced Study, Kyoto University, Yoshida, Ushinomiya-cho, Sakyo-ku, Kyoto, 606-8501 Japan

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Dr. Yi-Fan Gu

Dr. Yi-Fan Gu

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

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Lu Zheng

Lu Zheng

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

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Dr. Ping Wang

Dr. Ping Wang

Institute for Integrated Cell-Material Sciences, Kyoto University, Institute for Advanced Study, Kyoto University, Yoshida, Ushinomiya-cho, Sakyo-ku, Kyoto, 606-8501 Japan

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Dr. Shivanna Mohana

Dr. Shivanna Mohana

Institute for Integrated Cell-Material Sciences, Kyoto University, Institute for Advanced Study, Kyoto University, Yoshida, Ushinomiya-cho, Sakyo-ku, Kyoto, 606-8501 Japan

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Dr. Mickaele Bonneau

Dr. Mickaele Bonneau

Institute for Integrated Cell-Material Sciences, Kyoto University, Institute for Advanced Study, Kyoto University, Yoshida, Ushinomiya-cho, Sakyo-ku, Kyoto, 606-8501 Japan

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Tomoyuki Koganezawa

Tomoyuki Koganezawa

Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198 Japan

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Tetsuo Honma

Tetsuo Honma

Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198 Japan

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Hirotaka Ashitani

Hirotaka Ashitani

Department of Physical Science, Graduate School of Science, Osaka Prefecture University, Osaka, Japan

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Shogo Kawaguchi

Shogo Kawaguchi

Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198 Japan

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Prof. Yoshiki Kubota

Prof. Yoshiki Kubota

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

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Prof. Susumu Kitagawa

Corresponding Author

Prof. Susumu Kitagawa

Institute for Integrated Cell-Material Sciences, Kyoto University, Institute for Advanced Study, Kyoto University, Yoshida, Ushinomiya-cho, Sakyo-ku, Kyoto, 606-8501 Japan

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First published: 21 May 2023
Citations: 9

Graphical Abstract

Owing to the integration of soft porosity and electrical properties, conductive-on-insulating metal–organic framework (cMOF-on-iMOF) heterostructured nanocrystals (with the semiconductive soft porous interfaces) show enhanced selective sorption toward CO2, electrical gating, and “shape memory” effects for the guest responsive iMOF core, as revealed by operando synchrotron measurements.

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, Surn:x-wiley:14337851:media:anie202303903:anie202303903-math-0001 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.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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