Topological Isomerism in Three-Dimensional Covalent Organic Frameworks
Although isomerism is a typical and significant phenomenon in organic chemistry, it is rarely found in covalent organic framework (COF) materials. Herein, for the first time, we report a controllable synthesis of topological isomers in three-dimensional COFs via a distinctive tetrahedral building un...
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| Published in: | Journal of the American Chemical Society Vol. 145; no. 17; p. 9679 |
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| Main Authors: | , , , , , , , , , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
United States
03.05.2023
|
| ISSN: | 1520-5126, 1520-5126 |
| Online Access: | Get more information |
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| Summary: | Although isomerism is a typical and significant phenomenon in organic chemistry, it is rarely found in covalent organic framework (COF) materials. Herein, for the first time, we report a controllable synthesis of topological isomers in three-dimensional COFs via a distinctive tetrahedral building unit under different solvents. Based on this strategy, both isomers with a
or
net (termed JUC-620 and JUC-621) have been obtained, and their structures are determined by combining powder X-ray diffraction and transmission electron microscopy. Remarkably, these architectures show a distinct difference in their porous features; for example, JUC-621 with a
net exhibits permanent mesopores (up to ∼23 Å) and high surface area (∼2060 m
g
), which far surpasses those of JUC-620 with a
net (pore size of ∼12 Å and surface area of 980 m
g
). Furthermore, mesoporous JUC-621 can remove dye molecules efficiently and achieves excellent iodine adsorption (up to 6.7 g g
), which is 2.3 times that of microporous JUC-620 (∼2.9 g g
). This work thus provides a new way for constructing COF isomers and promotes structural diversity and promising applications of COF materials. |
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| Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
| ISSN: | 1520-5126 1520-5126 |
| DOI: | 10.1021/jacs.3c01070 |