A sensitive phosphorescence method based on MPA-capped Mn-doped ZnS quantum dots for the detection of diprophyllin

作者：Zheng, Ji; Fang, Xiao-xing; Qin, Jin; Zhang, Zhi-feng; Miao, Yan-ming; Yan, Gui-qin^*

来源：New Journal of Chemistry, 2016, 40(4): 3857-3862.

DOI：10.1039/c5nj03130c

• ROOM-TEMPERATURE PHOSPHORESCENCE
• BIOLOGICAL-FLUIDS
• NANOPARTICLES
• THEOPHYLLINE
• NANOCRYSTALS
• NANOHYBRIDS
• DYPHYLLINE
• SYSTEM
• PROBES
• SERUM

A new strategy for diprophyllin (DPP) detection was developed by utilizing room-temperature phosphorescence (RTP) of MPA-capped Mn-doped ZnS QDs. Upon the addition of diprophyllin, the phosphorescence intensity could be regularly quenched with the increase of diprophyllin and a linear relationship could be observed in the range of 1.97-197 nM with the limit of detection (LOD) of 0.893 nM. The phosphorescence quenching mechanism was preliminarily ascribed to electron transfer from photo-excited Mn-doped ZnS QDs to DPP that was used as an electron acceptor. Upon induction from Mn-doped ZnS QDs to diprophyllin, the electrons were able to cause significant phosphorescence quenching of Mn-doped ZnS QDs. This room-temperature phosphorescence system for diprophyllin detection is label-free, convenient, sensitive and selective, which can be used to detect diprophyllin in real samples.

• 出版日期2016
• 单位山西师范大学