Photocatalytic Molecular Oxygen Activation by Regulating Excitonic Effects in Covalent Organic Frameworks
University of Science and Technology of China · Hefei National Center for Physical Sciences at Nanoscale · +1 more institution
Abstract
Excitonic effects caused by Coulomb interactions between electrons and holes play subtle and significant roles on photocatalysis, yet have been long ignored. Herein, porphyrinic covalent organic frameworks (COFs, specifically DhaTph-M), in the absence or presence of different metals in porphyrin centers, have been shown as ideal models to regulate excitonic effects. Remarkably, the incorporation of Zn2+ in the COF facilitates the conversion of singlet to triplet excitons, whereas the Ni2+ introduction promotes the dissociation of excitons to hot carriers under photoexcitation. Accordingly, the discriminative excitonic behavior of DhaTph-Zn and DhaTph-Ni enables the activation of O2 to 1O2 and O2•–,…
Citation impact
- FWCI
- 25.25
- Percentile
- 100%
- References
- 65
Authors
4- YQYunyang Qian
University of Science and Technology of China, Hefei National Center for Physical Sciences at Nanoscale
- DLDandan Li
Anhui University
- YHYulan Han
University of Science and Technology of China, Hefei National Center for Physical Sciences at Nanoscale
- HJHai‐Long JiangCorresponding
University of Science and Technology of China, Hefei National Center for Physical Sciences at Nanoscale
Topics & keywords
- Chemistry
- Photocatalysis
- Photochemistry
- Singlet oxygen
- Photoexcitation
- Covalent bond
- Exciton
- Porphyrin
- Reduced inequalities