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首页> 外文期刊>RSC Advances >A turn on fluorescent sensor based on lanthanide coordination polymer nanoparticles for the detection of mercury(II) in biological fluids
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A turn on fluorescent sensor based on lanthanide coordination polymer nanoparticles for the detection of mercury(II) in biological fluids

机译：基于镧系元素配位聚合物纳米粒子的荧光传感器接通用于检测生物流体中的汞（II）

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摘要

Coordination polymers have recently emerged as very fascinating materials due to their tunable nature. In this work, we develop a lanthanide coordination polymer (CPNP)-based turn on sensor for Hg2+ detection by employing the strategy of inner filter effect (IFE). This kind of CPNP is composed of europium ions (Eu3+) as metal centers and isophthalic acid (IPA) as bridging ligands that can sensitize the fluorescence of Eu3+. Because the excitation spectrum of Eu/IPA CPNPs greatly overlaps with the absorbance band of imidazole-4,5-dicarboxylic acid (Im), the presence of Im can significantly quench the fluorescence of Eu/IPA CPNPs through a process of IFE. Upon the addition of Hg2+, however, the Im-quenched fluorescence of Eu/IPA CPNPs can be recovered due to the suppression of the IFE of Im through the formation of a Hg/Im complex. As a fluorescent sensor for Hg2+ detection, Eu/IPA CPNPs not only show high sensitivity up to a detection limit of 2 nM and excellent selectivity, but also possess the advantages of fast response, simple preparation procedure and flexible sensing performance. More importantly, interference from the background fluorescence of biological fluids can be efficiently eliminated via a time-resolved detection mode. The presence of the sensing strategy would be beneficial to the design of other lanthanide coordination polymer-based fluorescent sensors.
机译：由于其可调性，最近，协调聚合物最近被出现为非常令人迷人的材料。在这项工作中，通过采用内部过滤效果（IFE）的策略，开发用于HG2 +检测的镧系元素配位聚合物（CPNP）。这种CPNP由铕离子（EU3 +）作为金属中心和间苯二甲酸（IPA）作为桥接配体，其能够敏感EU3 +的荧光。因为Eu / IPA Cpnps的激发谱与咪唑-4,5-二羧酸（IM）的吸光带大大重叠，所以IM的存在可以通过IFE的方法显着地终止EU / IPA CPNP的荧光。然而，在加入HG2 +后，由于通过形成HG / IM复合物的IFE，可以回收EU / IPA CPNPS的IM淬火荧光。作为用于HG2 +检测的荧光传感器，EU / IPA CPNPS不仅显示出高度灵敏度高达2nm的检测限，选择性优异，而且还具有快速响应，简单的制备程序和灵活的传感性能的优点。更重要的是，可以通过时间分辨检测模式有效地消除来自生物流体的背景荧光的干扰。感测策略的存在将有利于其设计其他镧系元素配位聚合物基荧光传感器。

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  • 来源
    《RSC Advances》 |2016年第22期|共7页
  • 作者

    Li Qian; Wang Chengjuan; Tan Hongliang; Tang Gonge; Gao Jie; Chen Chia-Hung;

  • 作者单位

    Jiangxi Normal Univ Key Lab Funct Small Organ Mol MOE Jiangxi Prov Key Lab Chem Biol Coll Chem &

    Chem Engn Nanchang 330022 Peoples R China;

    Inst Geol Survey Jiangxi Prov Nanchang 330030 Peoples R China;

    Jiangxi Normal Univ Key Lab Funct Small Organ Mol MOE Jiangxi Prov Key Lab Chem Biol Coll Chem &

    Chem Engn Nanchang 330022 Peoples R China;

    Jiangxi Normal Univ Key Lab Funct Small Organ Mol MOE Jiangxi Prov Key Lab Chem Biol Coll Chem &

    Chem Engn Nanchang 330022 Peoples R China;

    Jiangxi Normal Univ Key Lab Funct Small Organ Mol MOE Jiangxi Prov Key Lab Chem Biol Coll Chem &

    Chem Engn Nanchang 330022 Peoples R China;

    Natl Univ Singapore Dept Biomed Engn Block E4 04-08 4 Engn Dr 3 Singapore 117583 Singapore;

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  • 正文语种 eng
  • 中图分类 化学;
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