文献类型：期刊文献

英文题名：Water intrusion-extrusion in 2-ethylimidazole/2-propylimidazole-doped ZIF-8: Influence of the substituent on imidazolate linker

作者：Wang, Yifan[1];Jiang, Hao[1];Zhou, Yousheng[1];Li, Peicheng[1];Zhao, Qiyue[1];Liu, Chuanlei[1];Wu, Qiumin[1];Fang, Diyi[1];Shen, Benxian[1];Sun, Hui[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]Xinjiang Univ, Sch Chem Engn & Technol, Minist Key Lab Oil & Gas Fine Chem, Urumqi 830046, Peoples R China

年份：2025

卷号：396

外文期刊名：MICROPOROUS AND MESOPOROUS MATERIALS

收录：;EI(收录号：20252518635800);WOS:【SCI-EXPANDED(收录号:WOS:001512875900001)】；

基金：This work is supported by the National Natural Science Foundation of China (Grant 22178109 and 21878097) and Key Research and Development Program of Xinjiang Uygur Autonomous Region (2024B01018) .

语种：英文

外文关键词：Zeolitic imidazolate framework; Linker doping; Intrusion-extrusion hysteresis; Heterogeneous lyophobic systems; Hydrophobicity

摘要：Controlling the intrusion and extrusion of non-wetting liquids in porous materials is fundamentally important for exploring the extensive applications of heterogeneous lyophobic systems (HLSs). Among various porous materials, metal-organic frameworks (MOFs) show promising potential for constructing HLSs due to their exceptional structural tunability. However, modulating their structures while maintaining both hydrophobicity and porosity remains a great challenge. In this work, a series of linker-doped zeolitic imidazolate frameworks (ZIFs) were synthesized by incorporating two additional linkers, 2-ethylimidazole and 2-propylimidazole, into ZIF-8. Synthesized samples were thoroughly characterized and subsequently employed to investigate water intrusionextrusion within their structures. Combined characterizations confirm that these linker-doped ZIFs exhibit tunable pore sizes and hydrophobicity. Water intrusion-extrusion experiments reveal that the intrusion pressure of the HLSs involving ZIFs can be well-tuned within the range of 26-49 MPa. Cycling intrusion-extrusion tests confirm the enhanced stability of linker-doped ZIFs. In addition, molecular dynamics simulations suggest that bulkier and more hydrophobic substituents on secondary linkers spatially hinder the diffusion of water molecules and facilitate their outflow. This study provides an approach to tuning the mechanical properties of HLSs and offers insights into the rational design of MOFs for a variety of applications.