A silica xerogel thin film based fluorescent sensor for pentachlorophenol rapid trace detection
A silica xerogel thin film based fluorescent sensor for pentachlorophenol rapid trace detection
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DOI：
10.1016/j.snb.2012.04.033
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发表时间：
2012-08
影响因子：
8.4
通讯作者：
Chaolong Tang;G. Meng;Qing Huang;Zhulin Huang;Xinrui Zhang;Meiling Wang
中科院分区：
文献类型：
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作者：
Chaolong Tang;G. Meng;Qing Huang;Zhulin Huang;Xinrui Zhang;Meiling Wang
报道了一种利用9-荧基甲醇(Fmoc-OH)掺杂二氧化硅干凝胶薄膜(Fmoc-OH@SiO_2干凝胶薄膜)快速检测五氯苯酚(PCP)的荧光方法。Fmoc-OH@SiO_2干凝胶薄膜不仅具有很短的识别时间，而且对PCP具有很高的检测灵敏度，基于荧光猝灭效应，检测下限可达10 nm，并在不同的PCP类似物中具有广泛的检测选择性。荧光变化的机理主要归因于分析物PCP与二氧化硅干凝胶薄膜中荧光团Fmoc-OH之间的荧光共振能量转移(FRET)，而对其他PCP类似物的不同灵敏度和选择性归因于FRET的效率、途径和荧光量子产率的不同。Fmoc-OH@SiO_2干凝胶薄膜在环境中痕量PCP的检测和监测方面具有潜在的应用前景。
We report a fluorescence approach to rapid detection of pentachlorophenol (PCP) by using 9-fluorenylmethanol (FMOC-OH) doped silica xerogel thin film (denoted as FMOC-OH@silica xerogel thin film). The FMOC-OH@silica xerogel thin film exhibits not only a very shorter discrimination time, but also with a high detection sensitivity to PCP with a lower limit down to 10nM based on fluorescence quenching effect and a broad detection selectivity among diverse PCP analogues. The mechanism for fluorescence changes is mainly attributed to the fluorescence resonance energy transfer (FRET) between the analyte PCP and the fluorophore FMOC-OH in silica xerogel thin film, and the different sensitivities and selectivities to other PCP analogues are ascribed to different FRET efficiencies, pathways and fluorescence quantum yields. The FMOC-OH @silica xerogel thin film has potentials in detecting and monitoring trace PCP in the environment.