A Tale of Two Trimers from Two Different Worlds: A COF‐Inspired Synthetic Strategy for Pore‐Space Partitioning of MOFs. Issue 19 (2nd April 2019)

• Record Type: Journal Article
• Authors: Wang, Yanxiang; Zhao, Xiang; Yang, Huajun; Bu, Xianhui; Wang, Yong; Jia, Xiaoxia; Li, Jinping; Feng, Pingyun
• Is Part Of: Angewandte Chemie international edition. Volume 58:Issue 19(2019)
• Page Start: 6316
• Page End: 6320
• Publication Date: 2019-04-02
• Subjects: boronic acids -- covalent organic frameworks -- materials science -- metal–organic frameworks -- pore-space partitioning; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201901343
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: The introduction of a symmetry‐ and size‐matching pore‐partitioning agent in the form of either a molecular ligand, such as 2, 4, 6‐tri(4‐pyridinyl)‐1, 3, 5‐triazine (tpt ), or a metal‐complex cluster, into the hexagonal channels of MIL‐88/MOF‐235‐type (the acs net) to create pacs ‐type (partitioned acs ) crystalline porous materials is an effective strategy to develop high‐performance gas adsorbents. We have developed an integrated COF–MOF coassembly strategy as a new method for pore‐space partitioning through the coassembly of [(M3 (OH)1− x (O) x (COO)6 ] MOF‐type and [B3 O3 (py)3 ] COF‐type trimers. With this strategy, the coordination‐driven assembly of the acs framework occurred concurrently and synergistically with the COF‐1‐type condensation of pyridine‐4‐boronic acid into a C3 ‐symmetric trimeric boroxine molecule. The resulting boroxine‐based pacs materials exhibited dramatically enhanced gas‐sorption properties as compared to nonpartitioned acs ‐type materials and are among the most efficient NH3 ‐sorption materials. Abstract : Cooperation beats competition : The coordination‐driven assembly of metal trimers enabled the symmetry‐ and size‐matched self‐condensation of a boronic acid into a trimer for pore‐space partitioning of large channels (see structure: B yellow, O red, C gray, N dark blue, metal ions light blue). The resulting high‐performance materials showed dramatically enhanced gas‐sorption properties as compared to nonpartitioned materials and efficient NH3 uptake.