Hg(II)-activated emission "turn-on" chemosensors excited by up-conversion nanocrystals: Synthesis, characterization and sensing performance

被引：3

作者：

Li, Shigang ^{[1
]}

Zhao, Xiaoyun ^{[1
]}

Tao, Dongliang ^{[2
]}

Zhang, Wenbao ^{[2
]}

Zhang, Kaiyin ^{[2
]}

机构：

[1] Fuyang Teachers Coll, Sch Phys & Elect Sci, Fuyang 236037, Anhui, Peoples R China

[2] Fuyang Teachers Coll, Sch Chem & Chem Engn, Fuyang 236037, Anhui, Peoples R China

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2015年 / 137卷

基金：

中国国家自然科学基金;

关键词：

Hg(II); Up-conversion nanocrystals; Sensor; Rhodamine derivative; ENERGY-TRANSFER; FLUORESCENT; MERCURY; NANOPARTICLES; HG2+; PRECONCENTRATION; SPECTROMETRY; MEDIA; PROBE; WATER;

D O I：

10.1016/j.saa.2014.08.109

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

In this paper, two emission "turn-on" chemosensors for Hg(II) sensing were designed and synthesized. Up-conversion NaYF4 nanocrystals were prepared and used as the excitation host for both chemosensors. Spectral analysis suggested that there should be an efficient energy transfer between the host and the chemosensors, which was then confirmed by excited state lifetime analysis. Then two sensing systems using this up-conversion host and the two chemosensors were constructed, their sensing performance for Hg(II) ions was then studied. It was found that the probe emission intensity increased with increasing Hg(II) concentrations, showing an emission "turn-on" effect. Good selectivity and linear response were observed from both sensing systems. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：581 / 588

页数：8

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