Persistent radical cation sp2 carbon-covalent organic framework for photocatalytic oxidative organic transformations

被引：68

作者：

Cheng, Yuan-Zhe ^{[1
,3
]}

Ji, Wenyan ^{[1
]}

Wu, Xianxin ^{[2
,3
]}

Ding, Xuesong ^{[1
]}

Liu, Xin-Feng ^{[2
,3
]}

Han, Bao-Hang ^{[1
,3
]}

机构：

[1] Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, CAS Key Lab Nanosyst & Hierarch Fabricat, Beijing 100190, Peoples R China

[2] Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, CAS Key Lab Standardizat & Measurement Nanotechno, Beijing 100190, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2022年 / 306卷

基金：

中国国家自然科学基金;

关键词：

Sp(2) carbon-covalent organic framework; Photoinduced radical material; Photocatalyst; Charge separation and recombination; Porous organic polymer; HYDROXYLATION; ACIDS;

D O I：

10.1016/j.apcatb.2022.121110

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Persistent radical covalent organic frameworks (COFs) have exhibited great application potential in the fields of photocatalysis, magnetism, and biology. However, there is still a lack of a simple, green, and effective way to produce persistent radical COFs. Here, we synthesized two sp2 carbon-covalent organic frameworks (sp(2)C-COFs) with persistent triphenylamine radical cation (TPA(+& BULL;)), which can be generated by simple light irradiation since the effective donor-acceptor heterojunction is formed in ordered skeleton. The number of persistent TPA(+& BULL;) will increase with the intensity of light irradiation and the photogenerated electrons generated simultaneously can be consumed by O-2 to form reactive oxygen species, which can be then used to carry out the oxidative organic transformations under visible light. In addition, femtosecond-transient absorption spectra prove that the difference in the structure of the two radical cation sp(2)C-COFs will significantly influence the charge recombination rate, so that the materials show different catalytic efficiency.

引用

页数：11

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