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

被引：146
|
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
收藏
页码：15364 / 15368
页数：5
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