Luminescent optical detection of volatile electron deficient compounds by conjugated polymer nanofibers.
Luminescent optical detection of volatile electron deficient compounds by conjugated polymer nanofibers.
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DOI：
10.1021/acs.analchem.5b00309
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发表时间：
2015-04
影响因子：
7.4
通讯作者：
A. Wade;P. Lovera;D. O’Carroll;H. Doyle;G. Redmond
中科院分区：
文献类型：
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作者：
A. Wade;P. Lovera;D. O’Carroll;H. Doyle;G. Redmond
通过荧光猝灭的挥发性缺电子分析物的光学检测证明使用ca。200 nm直径的模板合成的聚芴纳米纤维作为纳米级检测元件。观察到的分析物猝灭效果的趋势表明，除了充满活力的因素，分析物的蒸气压和聚合物/分析物的溶解度在发射猝灭过程中发挥了重要作用。单个纳米纤维成功地作为挥发性硝基芳族化合物的发光报告子百万分之几的水平。几何因素，涉及到的纳米cylindrical几何形状的纤维和低荧光底物的覆盖，提供一个不太拥挤的环境，周围的纤维，似乎发挥作用，在提供访问由缺电子猝灭剂分子的激发态内的纤维，从而促进了显着的荧光猝灭响应。
Optical detection of volatile electron deficient analytes via fluorescence quenching is demonstrated using ca. 200 nm diameter template-synthesized polyfluorene nanofibers as nanoscale detection elements. Observed trends in analyte quenching effectiveness suggest that, in addition to energetic factors, analyte vapor pressure and polymer/analyte solubility play an important role in the emission quenching process. Individual nanofibers successfully act as luminescent reporters of volatile nitroaromatics at sub-parts per million levels. Geometric factors, relating to the nanocylindrical geometry of the fibers and to low nanofiber substrate coverage, providing a less crowded environment around fibers, appear to play a role in providing access by electron deficient quencher molecules to the excited states within the fibers, thereby facilitating the pronounced fluorescence quenching response.