A turn-on fluorescent probe for vitamin C based on the use of a silicon/CoOOH nanoparticle system

作者：Lu, Qiujun; Chen, Xiaogen; Liu, Dan; Wu, Cuiyan; Liu, Meiling; Li, Haitao; Zhang, Youyu^*; Yao, Shouzhuo

来源：Microchimica Acta, 2019, 186(2): 72.

DOI：10.1007/s00604-018-3181-z

• Quenching
• Redox reaction
• Surface energy transfer
• Inner filter effect
• Silicon nanoparticles
• Fluorometry
• Stern-Volmer plot
• Fluorescence "turn-on" strategy
• Cobalt oxyhydroxide nanoparticles

The authors describe a fluorometric method for the turn-on determination of vitamin C (ascorbic acid). The blue fluorescence of silicon nanoparticles (SiNPs; with excitation/emission maxima at 350/450nm) is found to be quenched by CoOOH nanoparticles (NPs). In the presence of vitamin C, the CoOOH NPs are decomposed by a redox reaction between the diol group of vitamin C and CoOOH NPs. As a result, fluorescence recovers. On the basis of this finding, a fluorometric method was designed for the turn-on detection of vitamin C. Under optimal conditions, the method has a low detection limit (0.47M) and a linear response in the 0.5M to 20M a concentration range. It was successfully applied to the determination of vitamin C in spiked red grape and orange juice, and in vitamin C tablets.

• 出版日期2019-2
• 单位湖南师范大学