Fluorescence switching method for cascade detection of salicylaldehyde and zinc(II) ion using protein protected gold nanoclusters

被引：50

作者：

Liu, Xi ^{[1
,2
]}

Fu, Changhui ^{[1
]}

Ren, Xiangling ^{[1
]}

Liu, Huiyu ^{[1
]}

Li, Linlin ^{[1
]}

Meng, Xianwei ^{[1
]}

机构：

[1] Chinese Acad Sci, Tech Inst Phys & Chem, Lab Controllable Preparat & Applicat Nanomat, Ctr Micronanomat & Technol, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

BIOSENSORS & BIOELECTRONICS | 2015年 / 74卷

基金：

中国国家自然科学基金;

关键词：

Gold nanoclusters; Salicylaldehyde; Zn2+; Schiff base; Fluorescence switching; Coordination; ULTRASENSITIVE DETECTION; SELECTIVE FLUORESCENT; COLORIMETRIC SENSOR; ZN2+; HG2+; CHEMOSENSOR; PROBE;

D O I：

10.1016/j.bios.2015.06.034

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

A new fluorescence switching sensor for cascade detection of salicylaldehyde (SA) and Zinc(II) ion was developed based on bovine serum albumin protected gold nanoclusters (BSA-AuNCs). In the detection, SA interacted with amino groups of BSA-AuNCs, inducing simultaneous formation of fluorescent Schiff base and fluorescence quenching of AuNCs. Zn(II) could further strongly coordinate with the Schiff base ligands, leading to blue-shift and increase of the fluorescence from Schiff base-metal coordination complexes and simultaneous recovery of fluorescence from AuNCs. The new fluorescence switching sensor for Zn2+ detection has advantages of simplicity, rapidity, naked-eye detection, high sensitivity and selectivity. The linear range of the method for Zn2+ detection is from 0.1 mu M to 100 mu M with the limit of detection (LOD) of 29.28 nM. In practical samples, the recoveries of the samples ranged from 99.63% to 100.58%. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：322 / 328

页数：7

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