Covalent Organic Framework Functionalized with 8-Hydroxyquinoline as a Dual-Mode Fluorescent and Colorimetric pH Sensor

被引：152

作者：

Long Chen ^{[1
,2
]}

He, Linwei ^{[1
,2
]}

Ma, Fuyin ^{[1
,2
]}

Wei Liu ^{[1
,2
]}

Wang, Yaxing ^{[1
,2
]}

Silver, Mark A. ^{[1
,2
]}

Chen, Lanhua ^{[1
,2
]}

Lin Zhu ^{[1
,2
]}

Gui, Daxiang ^{[1
,2
]}

Juan Diwu ^{[1
,2
]}

Chai, Zhifang ^{[1
,2
,3
,4
]}

Wang, Shuao ^{[1
,2
]}

机构：

[1] Soochow Univ, State Key Lab Radiat Med & Protect, Sch Radiol & Interdisciplinary Sci RAD X, Collaborat Innovat Ctr Radiat Med Jiangsu Higher, Suzhou 215123, Peoples R China

[2] Soochow Univ, Sch Radiat Med & Protect, Suzhou 215123, Peoples R China

[3] Chinese Acad Sci, Inst High Energy Phys, Lab Nucl Energy Chem, Beijing 100049, Peoples R China

[4] Chinese Acad Sci, Key Lab Biomed Effects Nanomat & Nanosafety, Inst High Energy Phys, Beijing 100049, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2018年 / 10卷 / 18期

基金：

中国国家自然科学基金;

关键词：

chemosensor; colorimetric; covalent organic frameworks; fluorescent; low pH; mixed matrix membranes; MIXED MATRIX MEMBRANE; STABILITY; REMOVAL;

D O I：

10.1021/acsami.8b05484

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Real-time and accurate detection of pH in aqueous solution is of great significance in chemical, environmental, and engineering-related fields. We report here the use of 8-hydroxyquinoline-functionalized covalent organic framework (COF-HQ) for dual-mode pH sensing. In the fluorescent mode, the emission intensity of COF-HQ weakened as the pH decreased, and also displayed a good linear relationship against pH in the range from 1 to 5. In addition, COF-HQ showed discernible color changes from yellow to black as the acidity increased and can be therefore used as a colorimetric pH sensor. All these changes are reversible and COF-HQ can be recycled for multiple detection runs owing to its high hydrolytical stability. It can be further assembled into a mixed matrix membrane for practical applications.

引用

页码：15364 / 15368

页数：5

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