Electrochemiluminescence aptasensor for multiple determination of Hg2+ and Pb2+ ions by using the MIL-53(Al)@CdTe-PEI modified electrode

被引：56

作者：

Feng, Defen ^{[1
]}

Li, Penghui ^{[1
]}

Tan, Xuecai ^{[1
]}

Yeyu, Wu ^{[1
]}

Wei, Fucun ^{[1
]}

Du, Fangkai ^{[1
]}

Ai, Chenhao ^{[1
]}

Luo, Yanni ^{[1
]}

Chen, Quanyou ^{[1
]}

Han, Heyou ^{[2
]}

机构：

[1] Guangxi Univ Nationalities, Sch Chem & Chem Engn, Guangxi Key Lab Chem & Engn Forest Prod, Key Lab Guangxi Coll & Univ Food Safety & Pharmac, Nanning 530008, Peoples R China

[2] Huazhong Agr Univ, Coll Food Sci & Technol, Coll Sci, State Key Lab Agr Microbiol, Wuhan 430070, Peoples R China

来源：

ANALYTICA CHIMICA ACTA | 2020年 / 1100卷

基金：

中国国家自然科学基金;

关键词：

Metal-organic frameworks; Quantum dots; Heavy-metal ions; Electrochemiluminescence; ECL resonance energy transfer; METAL-ORGANIC FRAMEWORKS; BASE-PAIRS; SAMPLES; NANOCOMPOSITE; BIOSENSOR; ADSORBENT; COBALT;

D O I：

10.1016/j.aca.2019.11.069

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

An aptasensor based on MIL-53(Al)@CdTe was designed for multiple determination of Hg2+ and Pb2+ by electrochemiluminescence (ECL). Upon the recognition of Hg2+, aptamer 2-AuNPs form hairpin structures and are removed from the electrode. While in the presence of Pb2+, aptamer 1-PtNPs capture the target ions and form G-quadruplexes, and then bring PtNPs close enough to CdTe QDs to produce ECL resonance energy transfer. Upon aptamer interaction with Hg2+ and Pb2+, decreased ECL intensity was observed due to enhanced resonance energy transfer (ERET) and attenuated surface plasmon resonance (SPR). The ECL intensity difference (DECL) could therefore be used to detect heavy-metal ions with detection limits of 4.1 x 10(-12) M (path 1, Hg2+), 3.7 x 10(-11) M (path 2, Pb2+), and 2.4 x 10(-11) M (path 3, Pb2+). The aptasensor could also be used for detecting Hg2+ and Pb2+ in fish and shrimp samples with good recoveries. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：232 / 239

页数：8

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