Colorimetric detection of trace Hg2+ with near-infrared absorbing squaraine functionalized by dibenzo-18-crown-6 and its mechanism

被引：41

作者：

Hu, Lei

Zhang, Yafei

Nie, Li

Xie, Chenggen

Yan, Zhengquan ^{[1
]}

机构：

[1] West Anhui Univ, Anhui Prov Lab Biomimet Sensor & Detecting Techno, Luan 237012, Peoples R China

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2013年 / 104卷

关键词：

Bis-dibenzo-18-crown-6-based squaraine; Near infrared absorption; Calorimetric method; Hg2+ detection; SELECTIVE DETECTION; AQUEOUS-SOLUTIONS; FLUORESCENT; HG(II); DYE; NANOPARTICLES; CADMIUM; SENSORS;

D O I：

10.1016/j.saa.2012.11.026

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

In this contribution, an improved near-infrared absorbing colorimetric detection of Hg2+ ion with high selectivity and sensitivity had been developed by using bis-dibenzo-18-crown-6-based squaraine (BCSQ) as sensor in aqueous media. The proposed method was applied to analyze trace Hg2+ in synthetic Hg2+ samples and natural Hg2+ samples. Under the optimum conditions, the detection had a linear range of 7.5-150 x 10(-8) mol L-1 with a correlation coefficient (R) of 0.9983 combining a limit detection (3 sigma, n = 20) of 5.6 x 10(-9) mol L-1. The relative standard deviation (RSD) was lower than 2.4% (n = 5). The proposed method possesses the advantages of simplicity, rapidity, high selectivity and sensitivity. The action mechanism between BCSQ and Hg2+ was discussed in details. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：87 / 91

页数：5

共 23 条

[21] Selective fluorescent Hg(II) detection in aqueous solutions with a dye intermediate [J].