Green emissive nitrogen-doped graphene quantum dots for fluorescence off-on probing methimazole via palladium (II) mediated assay

被引：0

作者：

Xu, Hu ^{[1
]}

Shi, Mingwei ^{[1
]}

Zhang, Rui ^{[1
]}

Huang, Zhilong ^{[1
]}

Wang, Yuhong ^{[1
]}

机构：

[1] Shanghai Inst Technol, Sch Chem & Environm Engn, Shanghai 201418, Peoples R China

来源：

FUNCTIONAL MATERIALS LETTERS | 2024年 / 17卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Graphene quantum dots; methimazole; palladium ion; fluorescence off-on; FACILE SYNTHESIS; CARBON DOTS;

D O I：

10.1142/S1793604724500176

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A palladium ion (Pd2+)-mediated nitrogen-doped graphene quantum dots (N-GQDs/Pd2+) was developed as a fluorescent "off-on" probe for methimazole (MZ). Fluorescent N-GQDs interact with Pd2+ through coordination interactions, leading to weak photoluminescence (PL) owing to the quenching ability of Pd2+. Upon introducing MZ, the stronger binding between N-GQDs and Pd2+ destroys the N-GQDs/Pd2+ complex and restores the PL of N-GQDs. The probe exhibits a linear PL response to MZ concentrations from 3.0 to 50.0 mu M with a detection limit down to 4.5 nM. In addition, the probe has been used to detect MZ in real samples including natural water sources and human urine.

引用

页数：4

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