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A silica nanoparticle supported fluorescence 'turn-on' fluoride ion sensing system with tunable structure and sensitivity

机译：具有可调谐结构和敏感性的二氧化硅纳米粒子负载荧光“开启”氟离子传感系统

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Amino-silane modified silica nanoparticles (SNP-APTMS and SNP-TMSPEDA) doped with silyl-ether protected fluorescein isothiocyanate (FITC-OSMDBT) were synthesized via a sol-gel method in a simple three-step reaction to give fluoride ion probes SNP-TMSPEDA-FITC-OSMDBT (sensor A) and SNP-APTMS-FITC-OSMDBT (sensor B). The sensors were characterized using FT-IR, EDX, TGA, and fluorescence spectroscopy. It was observed that, at fluoride ion and FITC-OSMDBT mole equivalent titration ratio of x : x, the emission spectra of both sensors were similar when x = 1.0; however, at x = 3.0, 6.0, and 9.0, sensor B displayed 3 fold the emission intensity of sensor A. This phenomenon was attributed to non-radiative emission energy transfer mechanisms, which were controlled by the FITC-OSMDBT loading. The steric hindrance difference present on N-[3-(trimethoxysilyl) propyl] ethylenediamine (TMSPEDA) and (3-aminopropyl) trimethoxysilane (APTMS) ensured that different amounts of FITC-OSMDBT were loaded on each sensor. At x = 3.0, 6.0, and 9.0, the emission intensity increased linearly with [F-] in DMSO; thus, from the working curve of sensor A, the fluoride ion detection range of sensor B could be calculated and vice versa. The structure of the sensing system being proposed is simple, sensitive to F-, and may prove useful with respect to the development of fluoride anion sensors with structures which can be easily modified to produce sensors with varying detection ranges.
机译：掺杂有甲硅烷基醚氨基硅烷改性的二氧化硅纳米粒子（SNP-APTMS和SNP-TMSPEDA）保护的异硫氰酸荧光素（FITC-OSMDBT）通过在一个简单的三步反应的溶胶 - 凝胶法合成，得到的氟离子探针SNP- TMSPEDA-FITC-OSMDBT（传感器A）和SNP-APTMS-FITC-OSMDBT（传感器B）。使用FT-IR，EDX，TGA，和荧光光谱传感器进行了表征。据观察，在氟离子和FITC- OSMDBT摩尔当量滴定比率X：X，两个传感器的发射光谱类似于当x = 1.0;然而，在x = 3.0，6.0和9.0，传感器乙显示3倍这一现象是由于非辐射发射能量转换机构，其通过所述FITC-OSMDBT加载可控传感器A的发光强度。阻差存在于N- [3-（三甲氧基硅基）丙基]乙二胺（TMSPEDA）的空间位阻和（3-氨基丙基）三甲氧基硅烷（APTMS）确保了不同量的FITC-OSMDBT的被装上的每个传感器。在x = 3.0，6.0和9.0，发光强度呈线性增加的[F-]在DMSO;因此，来自传感器A的工作曲线，传感器B的氟离子的检测范围可以计算，反之亦然。感测系统的所提议的结构简单，F-敏感的，可能证明是有用的相对于氟阴离子传感器的发展与可以被容易地修改以产生传感器具有不同检测范围的结构。

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  • 来源
    《RSC Advances》 |2015年第39期|共11页
  • 作者

    Appiah-Ntiamoah Richard; Jadhav Arvind H.; Puguan John Marc C.; Momade Francis W. Y.; Kim Hern;

  • 作者单位

    Myongji Univ Energy &

    Environm Fus Technol Ctr Dept Energy &

    Biotechnol Yongin 449728 Kyonggi Do South Korea;

    Myongji Univ Energy &

    Environm Fus Technol Ctr Dept Energy &

    Biotechnol Yongin 449728 Kyonggi Do South Korea;

    Myongji Univ Energy &

    Environm Fus Technol Ctr Dept Energy &

    Biotechnol Yongin 449728 Kyonggi Do South Korea;

    Kwame Nkrumah Univ Sci &

    Technol Dept Mat Engn Kumasi Ghana;

    Myongji Univ Energy &

    Environm Fus Technol Ctr Dept Energy &

    Biotechnol Yongin 449728 Kyonggi Do South Korea;

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  • 正文语种 eng
  • 中图分类 化学;
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