A highly selective colorimetric fluorescent probe for detection of Hg2+ and its application on test strips

被引：17

作者：

Yang, Geng ^{[1
]}

Meng, Xia ^{[1
]}

Fang, Shimin ^{[1
]}

Duan, Hongdong ^{[1
]}

Wang, Lizhen ^{[2
]}

Wang, Zhenzheng ^{[1
]}

机构：

[1] Qilu Univ Technol, Shandong Acad Sci, Sch Chem & Pharmaceut Engn, Jinan 250300, Shandong, Peoples R China

[2] Qilu Univ Technol, Shandong Acad Sci, Biol Inst, Jinan 250014, Shandong, Peoples R China

来源：

RSC ADVANCES | 2019年 / 9卷 / 15期

关键词：

SCHIFF-BASE; GOLD NANOPARTICLES; AQUEOUS-MEDIA; QUANTUM DOTS; MERCURY; SENSOR; CHEMOSENSOR; COMPLEXES; FE3+; TOXICOLOGY;

D O I：

10.1039/c9ra00797k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An efficient fluorescent probe Pyr-Rhy based on pyrazole was developed, which can detect Hg2+ in water. Its fluorescence properties were studied by UV-vis and fluorescence spectroscopy, and the study results indicated that this probe can selectively detect Hg2+ via complexation reaction, and then cause a remarkable color change from colorless to pink and a strong fluorescence enhancement can be observed. Furthermore, this probe showed high sensitivity with the detection limit down to 2.07 x 10(-8) M, and its stoichiometric ratio toward Hg2+ ions was 1 : 1. The sensing mechanism was investigated by Job's plot H-1 NMR titrations, and FT-IR spectra analysis, which demonstrated a chelation-enhanced fluorescence (CHEF) mechanism. More importantly, obvious color changes of sensor Pyr-Rhy can be observed when it was impregnated on filter paper testing strips and immersed in Hg2+ solution (water as solution), indicating its potential application for trace Hg2+ detection in environmental samples.

引用

页码：8529 / 8536

页数：8

共 36 条

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