An exceptionally stable Zr-based fluorescent metal-organic framework for highly selective detection of pH

被引：21
作者：
Wu, Shun-Hua [1 ]
Wang, Shu [1 ]
Fang, Wen-Le [1 ]
Guo, Xiao-Feng [1 ]
Wang, Hong [1 ]
机构：
[1] Wuhan Univ, Dept Chem, Minist Educ, Key Lab Analyt Chem Biol & Med, Wuhan 430072, Hubei, Peoples R China
来源：
ANALYTICAL METHODS | 2019年 / 11卷 / 01期
基金：
中国国家自然科学基金;
关键词：
LOW URINE PH; HYDROGEN-SULFIDE; SENSOR; MOF; NANOSCALE; PROBE; ADSORPTION;
D O I：
10.1039/c8ay01998c
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
In this study, we synthesized metal-organic frameworks (MOFs) UiO-67-bpydc using H(2)bpydc as ligands and Zr-6 clusters as vertexes. Due to the protonation of the bipyridine group, UiO-67-bpydc shows pH-dependent fluorescence (365 nm/530 nm) in the pH range from 1 to 9, which shows its feasibility as a wide-range pH sensor. Further study indicated that UiO-67-bpydc exhibits stability, reusability, selectivity and has an excellent linear relationship in the pH range 4.0-6.5, and the mechanism of the UiO-67-bpydc fluorescence intensity with the variation of pH has been studied in detail. This MOF-based fluorescent sensor has been applied to specifically detect the pH of solutions in the presence of the body fluid matrix. Compared with reported pH-MOF sensors, UiO-67-bpydc can be practically applied in real samples and is easily prepared with excellent stability in different buffer solutions.
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页码：36 / 43
页数：8
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