Metal-free activation of molecular oxygen by covalent triazine frameworks for selective aerobic oxidation.

Abstract:

:Oxygen activation is a critical step in ubiquitous heterogeneous oxidative processes, most prominently in catalysis, electrolysis, and pharmaceutical applications. We present here our findings on metal-free O2 activation on covalent triazine frameworks (CTFs) as an important class of N-rich materials. The O2 activation process was studied for the formation of aldehydes, ketones and imines. A detailed mechanistic study of O2 activation and the role of nitrogen heteroatoms were comprehensively investigated. The electron paramagnetic resonance (EPR) and control experiments provide strong evidence for the reaction mechanism proving the applicability of the CTFs to activate oxygen into superoxide species. This report highlights the importance of a self-templating procedure to introduce N functionalities for the development of metal-free catalytic materials. The presented findings reveal an important step toward the use of CTFs as inexpensive and high-performance alternatives to metal-based materials not only for catalysis but also for biorelated applications dealing with O2 activation.

journal_name

Sci Adv

journal_title

Science advances

authors

Abednatanzi S,Gohari Derakhshandeh P,Leus K,Vrielinck H,Callens F,Schmidt J,Savateev A,Van Der Voort P

doi

10.1126/sciadv.aaz2310

subject

Has Abstract

pub_date

2020-04-03 00:00:00

pages

eaaz2310

issue

14

issn

2375-2548

pii

aaz2310

journal_volume

6

pub_type

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