A Hydrogen‐Bonded yet Hydrophobic Porous Molecular Crystal for Molecular‐Sieving‐like Separation of Butane and Isobutane | Zendy

Ye ZiMing | Zendy; Zhang XueWen | Zendy; Liao PeiQin | Zendy; Xie Yi | Zendy; Xu YanTong | Zendy; Zhang XueFeng | Zendy; Wang Chao | Zendy; Liu DeXuan | Zendy; Huang NingYu | Zendy; Qiu ZeHao | Zendy; Zhou DongDong | Zendy; He ChunTing | Zendy; Zhang JiePeng | Zendy

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A Hydrogen‐Bonded yet Hydrophobic Porous Molecular Crystal for Molecular‐Sieving‐like Separation of Butane and Isobutane

Author(s) -

Ye ZiMing,

Zhang XueWen,

Liao PeiQin,

Xie Yi,

Xu YanTong,

Zhang XueFeng,

Wang Chao,

Liu DeXuan,

Huang NingYu,

Qiu ZeHao,

Zhou DongDong,

He ChunTing,

Zhang JiePeng

Publication year - 2020

Publication title -

angewandte chemie international edition

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 1433-7851

DOI - 10.1002/anie.202011300

Subject(s) - isobutane , butane , adsorption , hydrogen bond , porous medium , chemical engineering , porosity , materials science , selectivity , molecular dynamics , crystal (programming language) , hydrogen , chemistry , molecule , organic chemistry , computational chemistry , catalysis , computer science , engineering , programming language

Porous molecular crystals sustained by hydrogen bonds and/or weaker connections are an intriguing type of adsorbents, but they rarely demonstrate efficient adsorptive separation because of poor structural robustness and tailorability. Herein, we report a porous molecular crystal based on hydrogen‐bonded cyclic dinuclear Ag I complex, which exhibits exceptional hydrophobicity with a water contact angle of 134°, and high chemical stability in water at pH 2–13. The seemingly rigid adsorbent shows a pore‐opening or nonporous‐to‐porous type butane adsorption isotherm and complete exclusion of isobutane, indicating potential molecular sieving. Quantitative column breakthrough experiments show slight co‐adsorption of isobutane with an experimental butane/isobutane selectivity of 23, and isobutane can be purified more efficiently than for butane. In situ powder/single‐crystal X‐ray diffraction and computational simulations reveal that a trivial guest‐induced structural transformation plays a critical role.

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