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A switchable electrochemical redox ratiometric substrate based on ferrocene for highly selective and sensitive fluoride detection

机译：基于二茂铁的可切换电化学氧化还原浆料基材，用于高选择性和敏感氟化物检测

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摘要

A novel latent electrochemical probe based on a ferrocenyl carbamate derivate (FCCD) was synthesized for the highly selective ratiometric detection of fluoride (F-). FCCD was synthesized through an easy, one step reaction using ferrocenyl azide and silyl protected benzyl alcohol as precursors through a Curtius rearrangement. In presence of F-, FCCD undergoes a nucleophilic substitution reaction, which led to the removal of silyl protecting group through 1,6-quinone-methide rearrangement with concomitant release of ferrocenyl amine (FA). As the concentration of F- increases, the amount of FCCD is dissipated, while that of FA accumulated in the reaction medium were monitored through the linear changes in their redox couples. Compared with a conventional ion selective electrode, the use of a cheaper unmodified electrode as a transducer coupled with FCCD displayed higher stability, excellent selectivity and better sensitivity with LOD of 5.1 x 10(-7) M (9.69 ppb). Moreover, FCCD is a selective and sensitive colorimetric visualization probe for F-. The proof-of-concept of the approach is demonstrated in direct toothpaste sample (non-transparent solutions), biological and water samples. The important advantages of this approach are high selectivity, the use of cheaper unmodified electrode, adoption of simple electrochemical methods, dual channel detection, low overpotential of the reporter, naked-eye detection, and ability to detect F- in non-transparent samples.
机译：基于二茂铁基氨基甲酸酯衍生物（FCCD）一种新颖的电化学潜探针为氟化物的高选择性比率检测（F-）合成。 FCCD通过合成的方便，使用二茂铁基叠氮化物和甲硅烷基保护的苄醇作为前体，通过Curtius重排一步反应。在F-的存在，FCCD经历亲核取代反应，从而导致了除去甲硅烷基保护基团通过1,6-醌甲基化物重排二茂铁胺（FA）的伴随释放的。随着F-浓度的增加，FCCD量消散，而在反应介质中积累FA的是通过在它们的氧化还原对的线性变化来监测。与传统的离子选择性电极相比，使用较便宜的未修饰的电极作为加上FCCD的换能器的显示较高的稳定性，优异的选择性和灵敏度更好为5.1×10（-7）M（9.69 ppb）的LOD。此外，FCCD为F-选择性的和敏感色可视化探针。证明的概念的方法的是体现在直接牙膏样品（非透明的解决方案），生物和水样。这种方法的重要的优点是高选择性，使用较便宜的未修饰的电极，采用简单的电化学方法，双通道检测，低的超电压记者的，肉眼检测，并检测F-非透明样品中的能力。

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  • 来源
    《RSC Advances》 |2016年第75期|共6页
  • 作者

    Manibalan Kesavan; Mani Veerappan; Huang Sheng-Tung;

  • 作者单位

    Natl Taipei Univ Technol Dept Chem Engn &

    Biotechnol Taipei 10608 Taiwan;

    Natl Taipei Univ Technol Dept Chem Engn &

    Biotechnol Taipei 10608 Taiwan;

    Natl Taipei Univ Technol Dept Chem Engn &

    Biotechnol Taipei 10608 Taiwan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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