Rhodamine B derivatives-modified upconversion nanoparticles as a fluorescent turn-off-on sensor for the highly
Zhipeng Meng1, Suli Wu1, Linghua Zhong1
1State Key Laboratory of Fine Chemicals, Dalian University of Technology 2 Linggong Road Dalian 116024 P. R. China wusuli@dlut.edu.cn.
Abstract:
Rhodamine B derivatives (RBP)-modified UCNPs (UCNPs@mSiO2-RBP) were developed as a fluorescent turn-off-on sensor based on FRET and IFE to detect Cu2+ and pyrophosphate (PPi) with a wide linear response range (0-10 μM for Cu2+ and 5-35 μM for PPi, much wider than that reported previously) and high sensibility (117 nM for Cu2+ and 70 nM for PPi). The MTT experiments and the bioimaging experiments show its promising prospect in tissue imaging.
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