Ultrasensitive Detection of 2,4-D at Surface of a Hybrid Silica Nanoparticle Based on Photoinduced-Electron Transfer Enhanced Fluorescence

作者：Gao Daming^*; Sun Hong; Si Jingyu; Chen Hong; Zhu Dechun; Shi Jianjun

来源：Asian Journal of Chemistry, 2012, 24(9): 4031-4034.

• Photoinduced-energy transfer
• Silica nanoparticles
• Ultratrace detection
• 2,4-D

This paper reports the ultrasensitive detection 2,4-D at the surface of hybrid silica nanoparticles through the enhanced-fluorescence intensity based on photoinduced-electon transfer mechanism. Nitrobenzoxadiazole (NBD) fluorophore and organic amine were covalently modified onto he Surface of silica to form a hybrid monolayer of dye fluorophores and amine ligands. Photoinduced electron transfer (PET) between nitrobenzoxadiazole and free amine at the spatial approach occurred at the surface of hybrid silica nanoparticles and the fluorescence intensity showed a suitable decrease by comparison of the original intensity of ligands APTS-NBD formed between amine and nitrobenzoxadia.zde. The presence of 2,4-D leads to fluorescence enhancement due to inhibition PET between amine and flourophores. In addition, these moparticles can be developed into chips by assembling on arrays onto silicon wafer for dotection of proton.

• 出版日期2012-9
• 单位合肥学院