Issue 22, 2022

Linker engineering in metal–organic frameworks for dark photocatalysis

Abstract

Dark reactions featuring continuous activity under light off conditions play a critical role in natural photosynthesis. However, most artificial photocatalysts are inactive upon the removal of the light source, and the artificial photocatalysts with dark photocatalysis abilities have been rarely explored. Herein, we report a Ti-based metal–organic framework (MOF), MIL-125, exhibiting the capability of dark photocatalytic hydrogen production. Remarkably, the introduction of different functional groups onto the linkers enables distinctly different activities of the resulting MOFs (MIL-125-X, X = NH2, NO2, Br). Dynamic and thermodynamic investigations indicate that the production and lifetime of the Ti3+ intermediate are the key factors, due to the electron-donating/-withdrawing effect of the functional groups. As far as we know, this is the first report on dark photocatalysis over MOFs, providing new insights into the storage of irradiation energy and demonstrating their great potential in dark photocatalysis due to the great MOF diversity.

Graphical abstract: Linker engineering in metal–organic frameworks for dark photocatalysis

Supplementary files

Article information

Article type
Edge Article
Submitted
06 12 2021
Accepted
07 5 2022
First published
09 5 2022
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2022,13, 6696-6703

Linker engineering in metal–organic frameworks for dark photocatalysis

Y. Pan, J. Wang, S. Chen, W. Yang, C. Ding, A. Waseem and H. Jiang, Chem. Sci., 2022, 13, 6696 DOI: 10.1039/D1SC06785K

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