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Sensors and Actuators B: Chemical, Volumes 171–172, August–September 2012, Pages 332-337
Chaolong Tang, Guowen Meng, Qing Huang, Zhulin Huang, Xinrui Zhang, Meiling Wang
Show preview Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanostructure, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
University of Science and Technology of China, Hefei 230026, People’s Republic of China
Key Laboratory of Ion Beam Bioengineering, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
Abstract
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 10 nM 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.
