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journal article·2025-07

Direct Imaging of Co‐CUK‐1 Framework with H2O Guests

Dong‐Hwan Yang, Minjeong Kim, Jinyoung Ko, Gi‐Yeop Kim, Hyung Gyu Park, Sarah S. Park, Kyung Ho Cho, Ji Sun Lee, Jong‐San Chang, U‐Hwang Lee, Ryo Ishikawa, Naoya Shibata, Yousung Jung, Jonghwan Kim, Teruyasu Mizoguchi, Si‐Young Choi

Small· Volume 21· Issue 29
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Source abstract

Abstract

Abstract The flexible architectural design of metal clusters and organic ligands attributes Metal–Organic Frameworks (MOFs) as one of the most versatile materials. Host‐guest interactions contribute to this versatility, highlighting the need for a fundamental understanding of host frame‐guest molecule units. Herein, ab‐initio calculations elucidate the spatial distribution of H2O guest molecules (guests) within [101] honeycomb channel of Co‐CUK‐1, where the H2O guests are 1D aligned with the highest superposition density. In situ heating Raman spectroscopy demonstrates that H2O guests within the Co‐CUK‐1 frame behave like a vapor phase, maintaining phase stability even when heated to 120 °C. Scanning Transmission Electron Microscopy (STEM) enables the identification of both the Co‐CUK‐1 frame and the H2O guests in [101] honeycomb channel. Correlative Light and Electron Microscopy (CLEM) further reveals the intrinsic insulative nature of the Co‐CUK‐1 frame, along with extrinsic in‐gap states caused by H2O adsorption. By integrating ab‐initio calculations, in situ heating Raman spectroscopy, and atomic‐scale investigations via STEM and CLEM, this study establishes a comprehensive structural analysis of MOFs—materials that are highly versatile yet extremely sensitive to electron beam exposure.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Metal-Organic Frameworks: Synthesis and Applications · Magnetism in coordination complexes · Nanocluster Synthesis and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Materials Science and Engineering Pohang University of Science and Technology (POSTECH) 77 Cheongam‐ro, Nam‐gu Pohang 37673 Republic of Korea

Center for Van der Waals Quantum Solids Institute for Basic Science (IBS) 79 Jigok‐ro, Nam‐gu Pohang 37673 Republic of Korea

School of Chemical and Biological Engineering Seoul National University (SNU) 1 Gwanak‐ro, Gwanak‐gu Seoul 08826 Republic of Korea

Department of Mechanical Engineering POSTECH 77 Cheongam‐ro, Nam‐gu Pohang 37673 Republic of Korea

Department of Chemistry POSTECH 77 Cheongam‐ro, Nam‐gu Pohang 37673 Republic of Korea

Research Group for Nanocatalysts and Chemical Process Technology Division Korea Research Institute of Chemical Technology (KRICT) 141 Gajeong‐ro, Yuseong‐gu Daejeon 34114 Republic of Korea

Institute of Engineering Innovation The University of Tokyo Tokyo 113‐8656 Japan

Institute of Industrial Science The University of Tokyo Tokyo 153‐8505 Japan

Department of Semiconductor Engineering POSTECH 77 Cheongam‐ro, Nam‐gu Pohang 37673 Republic of Korea

Funding

Institute for Basic Science · Korea Basic Science Institute

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