Merging benzotrithiophene covalent organic framework photocatalysis with TEMPO for selective oxidation of organic sulfides.
In: SCIENCE CHINA Chemistry, Jg. 66 (2023-11-01), Heft 11, S. 3290-3296
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Zugriff:
Visible light photocatalysis of covalent organic frameworks (COFs) has made significant progress in recent years. Benzotrithiophene (BTT), a planar, electron-rich building block, turns out to be foundational in assembling COFs in which the full π-conjugation of BTT is essential to facilitate electron transfer. Herein, a sp 2 carbon-conjugated COF, namely BTT-sp 2 c-COF, is assembled from benzo[1,2-b:3,4-b′:5,6-b″]trithiophene-2,5,8-tricarbaldehyde and [1,1′:4′,1″-terphenyl]-4,4″-dicarbonitrile towards photocatalysis. More importantly, TEMPO (2,2,6,6-tetramethylpiperidin-1-yl)oxyl, 1 mol%) could considerably accelerate the selective oxidation of organic sulfides with O 2 over BTT-sp 2 c-COF. TEMPO mediates hole transfer between BTT-sp 2 c-COF and organic sulfides, and O-atoms are incorporated into sulfoxides via an electron transfer pathway. Merging BTT-sp 2 c-COF photocatalysis with TEMPO generally applies to transforming organic sulfides into sulfoxides. This work implies the full π-conjugation of electron-rich building blocks into COFs is a viable strategy for selective visible light photocatalysis. [ABSTRACT FROM AUTHOR]
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Titel: |
Merging benzotrithiophene covalent organic framework photocatalysis with TEMPO for selective oxidation of organic sulfides.
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Autor/in / Beteiligte Person: | Huang, Fengwei ; Wang, Yuexin ; Dong, Xiaoyun ; Lang, Xianjun |
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Zeitschrift: | SCIENCE CHINA Chemistry, Jg. 66 (2023-11-01), Heft 11, S. 3290-3296 |
Veröffentlichung: | 2023 |
Medientyp: | academicJournal |
ISSN: | 1674-7291 (print) |
DOI: | 10.1007/s11426-023-1644-x |
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