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Zeng, Heng; Xie, Mo; Huang, Yong‐Liang; Zhao, Yifang; Xie, Xiao‐Jing; Bai, Jian‐Ping; Wan, Meng‐Yan; Krishna, Rajamani; Lu, Weigang; Li, Dan
Angewandte Chemie International Edition, June 17, 2019, Volume: 58, Issue: 25Journal Article
Porous materials that can undergo pore‐structure adjustment to better accommodate specific molecules are ideal for separation and purification. Here, we report a stable microporous metal‐organic framework, JNU‐1, featuring one‐dimensional diamond‐shaped channels with a high density of open metal sites arranged on the surface for the cooperative binding of acetylene. Together with its framework flexibility and appropriate pore geometry, JNU‐1 exhibits an induced‐fit behavior for acetylene. The specific binding sites and continuous framework adaptation upon increased acetylene pressure are validated by molecular modeling and in situ X‐ray diffraction study. This unique induced‐fit behavior endows JNU‐1 with an unprecedented increase in the acetylene binding affinity (adsorption enthalpy: up to 47.6 kJ mol−1 at ca. 2.0 mmol g−1 loading). Tailored pores: A flexible microporous metal‐organic framework (MOF) physisorbent, JNU‐1, exhibits an induced‐fit behavior for acetylene. This unique behavior endows JNU‐1 with an unprecedented increase in the acetylene binding affinity (adsorption enthalpy: up to 47.6 kJ mol−1 at ca. 2.0 mmol g−1 loading), which enables a remarkable selectivity towards acetylene over other gas molecules including carbon dioxide.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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