[1]杨海冉,杨传孝,孙向英.CdS-Eu(Ⅲ)体系荧光恢复的磷酸根离子可视化测定[J].华侨大学学报(自然科学版),2014,35(4):413-418.[doi:10.11830/ISSN.1000-5013.2014.04.0413]
　YANG Hai-ran,YANG Chuan-xiao,SUN Xiang-ying.Fluorescence Recovery and Visual Detections for Phosphate Based on CdS-Eu(Ⅲ)System[J].Journal of Huaqiao University(Natural Science),2014,35(4):413-418.[doi:10.11830/ISSN.1000-5013.2014.04.0413]
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CdS-Eu(Ⅲ)体系荧光恢复的磷酸根离子可视化测定()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第35卷
期数:
2014年第4期
页码:
413-418
栏目:
出版日期:
2014-07-10

文章信息/Info

Title:
Fluorescence Recovery and Visual Detections for Phosphate Based on CdS-Eu(Ⅲ)System
文章编号:
1000-5013(2014)04-0413-06
作者:
杨海冉;  杨传孝;  孙向英
华侨大学 材料科学与工程学院, 福建 厦门 361021
Author(s):
YANG Hai-ran;  YANG Chuan-xiao;  SUN Xiang-ying
College of Material Science and Engineering, Huaqiao University, Xiamen 361021, China
关键词:
CdS量子点;  Eu3+;  荧光恢复;  磷酸根离子
Keywords:
CdS quantum dots;  Eu3+;  fluorescence recovery;  phosphate anion
分类号:
O655
DOI:
10.11830/ISSN.1000-5013.2014.04.0413
文献标志码:
A
摘要:
以聚丙烯酸(PAA)为稳定剂,成功合成了水溶性的CdS量子点(QDs).CdS QDs表面的羧基能与Eu3+ 结合导致QDs聚集,有效引发QDs间能量的转移,致使CdS QDs荧光显著猝灭.当加入PO3-4时,由于PO3-4与Eu3+的结合能力强于CdS QDs表面的羧基,CdS QDs荧光强度又逐渐恢复.由此建立一种基于CdS-Eu(Ⅲ)体系荧光恢复可视化测定磷酸根离子的新方法.该方法灵敏、简单,检测限为0.078 μmol·L-1.
Abstract:
In this study, the water-soluble CdS quantum dots(QDs)stabilized by polyacrylic acid(PAA)were successfully synthesized. Eu3+ ions could efficiently induce clustering of QDs through the carboxylic acid groups on surface of CdS QDs, which resulted in apparent fluorescence quenching due to energy transfer between CdS QDs. Because the chelation ability between Eu3+ and PO3-4 was stronger than that between Eu3+ and carboxyl groups,the fluorescence intensity of CdS QD gradually recovered when PO3-4 were introduced to the CdS-Eu(Ⅲ)system. Thus a novel fluorescence recovery and visual method for the determination of PO3-4 has been developed based on CdS-Eu(Ⅲ)system. The present novel assay with a detection limit(3σ)of 0.078 μmol·L-1 is very simple and sensitive.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2014-01-04
通信作者: 杨传孝(1970-),男,副教授,主要从事纳米材料及生化、环境分析的研究.E-mail:cxyang@hqu.edu.cn.
基金项目: 国家自然科学基金资助项目(21275059, 21175049); 华侨大学基本科研业务费专项基金资助项目(JB-ZR1118)
更新日期/Last Update: 2014-07-20