Exploring the mechanism of CdTe quantum dots as fluorescent probe to detect Hg(II) ion from the perspectives of fluorescence polarization and light scattering

被引：11

作者：

Zhou, Hongyu ^{[1
]}

Yang, Congling ^{[1
]}

Liao, Mengxia ^{[1
]}

Li, Minglian ^{[1
]}

Diao, Na ^{[1
]}

Wu, Shaogui ^{[1
]}

Wang, Jiayang ^{[2
]}

机构：

[1] Sichuan Normal Univ, Coll Chem & Mat Sci, Chengdu 610066, Peoples R China

[2] Chengdu Univ Informat Technol, Coll Resources & Environm, Chengdu 610041, Peoples R China

来源：

CHEMICAL PHYSICS LETTERS | 2022年 / 792卷

关键词：

Quantum dots; Fluorescent sensor; Fluorescence polarization; Light scattering; SENSITIVE DETECTION; CAPPING AGENT; NANOSENSOR; SENSOR; HG2+;

D O I：

10.1016/j.cplett.2022.139415

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The mechanism of quantum dots (QDs) as fluorescent nano sensor to detect metal ions remains controversial. Herein, we investigate the mechanism from the perspectives of fluorescence polarization and light scattering, where CdTe QDs are employed as a model fluorescent sensor and Hg(2+& nbsp;)ion is used as a model quencher. When the QDs react with Hg2+, we observed that the fluorescence is quenched while light scattering is enhanced and the fluorescence anisotropy is increased. This indicates that Hg2+ destabilizes the QDs and drives them to agglomerate, which might be an important contributor to the fluorescence quenching. This work provides novel insights to explain the mechanism of QDs as fluorescent probe to detect metal ions.

引用

页数：9

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