Chen, X.; Yu, C.; Yusran, Y.; Qiu, S.; Fang, Q. Breaking Dynamic Behavior in 3D Covalent Organic Framework with Pre-Locked Linker Strategy. Nanomaterials2024, 14, 329.
Chen, X.; Yu, C.; Yusran, Y.; Qiu, S.; Fang, Q. Breaking Dynamic Behavior in 3D Covalent Organic Framework with Pre-Locked Linker Strategy. Nanomaterials 2024, 14, 329.
Chen, X.; Yu, C.; Yusran, Y.; Qiu, S.; Fang, Q. Breaking Dynamic Behavior in 3D Covalent Organic Framework with Pre-Locked Linker Strategy. Nanomaterials2024, 14, 329.
Chen, X.; Yu, C.; Yusran, Y.; Qiu, S.; Fang, Q. Breaking Dynamic Behavior in 3D Covalent Organic Framework with Pre-Locked Linker Strategy. Nanomaterials 2024, 14, 329.
Abstract
As for their large surface area and pore volume, three-dimensional covalent organic frameworks (3D COFs) have emerged as competitive porous materials. However, due to the structural dynamic behavior particularly for imine-linked 3D COFs, potentially unlock their potential for gas storage application. Herein, we showed a pre-locked linker strategy introduces breaking dynamic behavior in 3D COFs. A predesigned planar linker based 3,8-diamino-6-phenylphenanthridine (DPP) was prepared to produce non-dynamic 3D JUC-595, as benzylideneamine moiety in DPP locked the linker flexibility and restrict the molecular-bond rotation of the imine linkages. Upon solvent inclusion and release, the PXRD profile of JUC-595 remained intake, while JUC-594 with flexible benzidine linker experienced crystal transformation due to framework contraction-expansion. As a result, the activated JUC-595 achieved higher surface areas (754 m² g-1) than that of JUC-594 (548 m² g-1). Furthermore, improved CO2 and CH4 storages were also seen in JUC-595 compared with JUC-594. Impressively, JUC-595 recorded high normalized H2 storage capacity that surpass other reported high surface area 3D COFs. This works shows important insight on manipulating structural properties of 3D COF to tune the gas storage performance.
Keywords
covalent organic framework; breaking dynamic behavior; pre-locked linker; gas storage
Subject
Chemistry and Materials Science, Materials Science and Technology
Copyright:
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