Volume 61, Issue 2 e202114490
Research Article

A Metal–Organic Framework as a Multiphoton Excitation Regulator for the Activation of Inert C(sp3)−H Bonds and Oxygen

Guanfeng Ji

Guanfeng Ji

State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024 China

Search for more papers by this author
Prof. Dr. Liang Zhao

Corresponding Author

Prof. Dr. Liang Zhao

State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024 China

Search for more papers by this author
Jianwei Wei

Jianwei Wei

State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024 China

Search for more papers by this author
Dr. Junkai Cai

Dr. Junkai Cai

State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024 China

Search for more papers by this author
Prof. Dr. Cheng He

Prof. Dr. Cheng He

State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024 China

Search for more papers by this author
Zenggang Du

Zenggang Du

State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024 China

Search for more papers by this author
Wei Cai

Wei Cai

State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024 China

Search for more papers by this author
Prof. Dr. Chunying Duan

Corresponding Author

Prof. Dr. Chunying Duan

State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024 China

Search for more papers by this author
First published: 07 November 2021
Citations: 47

Graphical Abstract

Through covalent modification of the nicotinamide adenine dinucleotide mimics and CeIII-OEt moieties in a metal–organic framework, a new multiphoton excitation approach was developed. This new strategy enables step-by-step triggering of the photoinduced electron transfer, ligand-to-metal charge transfer and hydrogen atom transfer processes for activation of inert C(sp3)−H bonds and oxygen.

Abstract

The activation and oxidization of inert C(sp3)−H bonds into value-added chemicals affords attractively economic and ecological benefits as well as central challenge in modern chemistry. Inspired by the natural enzymatic transformation, herein, we report a new multiphoton excitation approach to activate the inert C(sp3)−H bonds and oxygen by integrating the photoinduced electron transfer (PET), ligand-to-metal charge transfer (LMCT) and hydrogen atom transfer (HAT) events together into one metal-organic framework. The well-modified nicotinamide adenine dinucleotide (NAD+) mimics oxidized CeIII-OEt moieties to generate CeIV-OEt chromophore and its reduced state mimics NAD. via PET. The in situ formed CeIV-OEt moiety triggers a LMCT excitation to form the alkoxy radical EtO., abstracts a hydrogen atom from the C(sp3)−H bond, accompanying the recovery of CeIII-OEt and the formation of alkyl radicals. The formed NAD. activates oxygen to regenerate the NAD+ for next recycle, wherein, the activated oxygen species interacts with the intermediates for the oxidization functionalization, paving a catalytic avenue for developing scalable and sustainable synthetic strategy.

Conflict of interest

The authors declare no conflict of interest.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.