Dangling bond formation on COF nanosheets for enhancing sensing performances

被引：30

作者：

Chen, Yong-Jun ^{[1
,3
]}

Liu, Ming ^{[2
]}

Chen, Jie ^{[1
]}

Huang, Xin ^{[4
]}

Li, Qiao-Hong ^{[1
]}

Ye, Xiao-Liang ^{[1
]}

Wang, Guan-E. ^{[1
]}

Xu, Gang ^{[1
,3
,5
]}

机构：

[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fujian Prov Key Lab Mat & Tech Tech Hydrogen Energ, Fuzhou 350002, Fujian, Peoples R China

[2] Frontier Sci Univ Elect Sci & Technol China, Inst Fundamental, Chengdu 611731, Peoples R China

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

[4] Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Key Lab Biofunct Mat, Nanjing 210023, Peoples R China

[5] Fujian Sci & Technol Innovat Lab Optoelect Informa, Fuzhou 350108, Fujian, Peoples R China

来源：

CHEMICAL SCIENCE | 2023年 / 14卷 / 18期

基金：

中国国家自然科学基金;

关键词：

COVALENT ORGANIC FRAMEWORKS; ROOM-TEMPERATURE; SENSORS;

D O I：

10.1039/d3sc00562c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Dangling bond formation for COF materials in a rational manner is an enormous challenge, especially through post-treatment which is a facile strategy while has not been reported yet. In this work, a "chemical scissor" strategy is proposed for the first time to rationally design dangling bonds in COF materials. It is found that Zn2+ coordination in post-metallization of TDCOF can act as an "inducer" which elongates the target bond and facilitates its fracture in hydrolyzation reactions to create dangling bonds. The number of dangling bonds is well-modulated by controlling the post-metallization time. Zn-TDCOF-12 shows one of the highest sensitivities to NO2 in all reported chemiresistive gas sensing materials operating under visible light and room temperature. This work opens an avenue to rationally design a dangling bond in COF materials, which could increase the active sites and improve the mass transport in COFs to remarkably promote their various chemical applications.

引用

页码：4824 / 4831

页数：8

共 60 条

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