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基于Mn:ZnS量子点-Cu2+体系室温磷光猝灭-恢复方法测定水体中焦磷酸根离子

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李玉美, 卢运贤, 班睿, 罗迎春, 杜海军. 基于Mn:ZnS量子点-Cu2+体系室温磷光猝灭-恢复方法测定水体中焦磷酸根离子[J]. 环境化学, 2016, 35(5): 941-947. doi: 10.7524/j.issn.0254-6108.2016.05.2015111003
引用本文: 李玉美, 卢运贤, 班睿, 罗迎春, 杜海军. 基于Mn:ZnS量子点-Cu2+体系室温磷光猝灭-恢复方法测定水体中焦磷酸根离子[J]. 环境化学, 2016, 35(5): 941-947. doi: 10.7524/j.issn.0254-6108.2016.05.2015111003
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LI Yumei, LU Yunxian, BAN Rui, LUO Yingchun, DU Haijun. An “off-on” room-temperature phosphorescence probe based on Mn:ZnS quantum dots/Cu2+ complex for determination of pyrophosphate in water[J]. Environmental Chemistry, 2016, 35(5): 941-947. doi: 10.7524/j.issn.0254-6108.2016.05.2015111003
Citation: LI Yumei, LU Yunxian, BAN Rui, LUO Yingchun, DU Haijun. An “off-on” room-temperature phosphorescence probe based on Mn:ZnS quantum dots/Cu2+ complex for determination of pyrophosphate in water[J]. Environmental Chemistry, 2016, 35(5): 941-947. doi: 10.7524/j.issn.0254-6108.2016.05.2015111003
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基于Mn:ZnS量子点-Cu2+体系室温磷光猝灭-恢复方法测定水体中焦磷酸根离子

  • 1.

    贵州民族大学化学与环境科学学院, 贵阳, 550025

  • 基金项目:

    国家自然科学基金(21565010),国家民委科研项目(14GZZ003),国家级大学生创新创业训练项目(201510672004),贵州省科学技术基金([2012]2187),贵州省科学技术厅-贵州民族大学科技联合基金(LKM[2011]13)资助.

An “off-on” room-temperature phosphorescence probe based on Mn:ZnS quantum dots/Cu2+ complex for determination of pyrophosphate in water

  • 1.

    School of Chemistry and Environmental Science, Guizhou Minzu University, Guiyang, 550025, China

  • Fund Project: Supported by the National Natural Science Foundation of China (21565010), Research Projects of the State Ethnic Affairs Commission of china (14GZZ003), the National Undergraduate Innovation and Entrepreneurship Training Programs (201510672004), the Science and Technology Foundation of Guizhou Province ([2012]2187), Guizhou Provincial Department of Science and Technology-Guizhou Minzu University Joint Fund (LKM[2011]13).

  • 摘要: 以谷胱甘肽(GSH)为稳定剂,成功合成了高性能的水溶性Mn:ZnS量子点(Quantum dots,QDs).Mn:ZnS QDs表面的羧基能与Cu2+结合从而有效引发QDs电子转移,致使Mn:ZnS QDs室温磷光显著猝灭.当体系中加入焦磷酸(PPi)时,由于Cu2+与PPi的结合能力强于Mn:ZnS QDs表面的羧基,Mn:ZnS QDs磷光强度又逐渐恢复.据此建立一种基于Mn:ZnS QDs-Cu2+体系的室温磷光探针测定焦磷酸根离子的新方法.该方法灵敏、简单,线性范围为5.0×10-8-1.0×10-4 mol·L-1,检测限为1.0×10-8 mol·L-1.经过干扰实验及添加回收率实验证实,该方法具有良好的选择性,满足于实际样品水体中焦磷酸的检测分析.
    Abstract: Water-soluble Mn:ZnS quantum dots (QDs) were synthesized with glutathione (GSH) as a stabilizer. Cu2+ coordinated with the carboxyl group of GSH on the surface of Mn:ZnS QDs and blocked the charge transfer of Mn:ZnS QDs, which resulted in apparent room-temperature phosphorescence (RTP) quenching. Because the chelation ability of Cu2+ with pyrophosphate (PPi) was stronger than with carboxyl groups, the RTP intensity of Mn:ZnS QD gradually recovered when PPi was introduced to the Mn:ZnS Quantum Dots/Cu2+ system. Thus a novel "off-on" room-temperature phosphorescence probe for the determination of PPi was developed based on Mn:ZnS Quantum Dots/Cu2+ system. A linear range 5.0×10-8 to 1.0×10-4 mol·L-1 for PPi was obtained with a limit of detection (LOD) of 1.0×10-8 mol·L-1. The present novel assay was very simple and sensitive. Our results reveal that the proposed RTP probe can be applied for the determination of PPi in real water samples.
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  • 收稿日期:  2015-11-10
  • 刊出日期:  2016-05-15

基于Mn:ZnS量子点-Cu2+体系室温磷光猝灭-恢复方法测定水体中焦磷酸根离子

  • 1. 贵州民族大学化学与环境科学学院, 贵阳, 550025
  • 收稿日期:  2015-11-10
基金项目:

国家自然科学基金(21565010),国家民委科研项目(14GZZ003),国家级大学生创新创业训练项目(201510672004),贵州省科学技术基金([2012]2187),贵州省科学技术厅-贵州民族大学科技联合基金(LKM[2011]13)资助.

摘要: 以谷胱甘肽(GSH)为稳定剂,成功合成了高性能的水溶性Mn:ZnS量子点(Quantum dots,QDs).Mn:ZnS QDs表面的羧基能与Cu2+结合从而有效引发QDs电子转移,致使Mn:ZnS QDs室温磷光显著猝灭.当体系中加入焦磷酸(PPi)时,由于Cu2+与PPi的结合能力强于Mn:ZnS QDs表面的羧基,Mn:ZnS QDs磷光强度又逐渐恢复.据此建立一种基于Mn:ZnS QDs-Cu2+体系的室温磷光探针测定焦磷酸根离子的新方法.该方法灵敏、简单,线性范围为5.0×10-8-1.0×10-4 mol·L-1,检测限为1.0×10-8 mol·L-1.经过干扰实验及添加回收率实验证实,该方法具有良好的选择性,满足于实际样品水体中焦磷酸的检测分析.

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