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| Fluorescent Carbon Dots: Synthesis and Ag+ Assisted Turn-On Recognition of D-Penicillamine |
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| Abstract: Carbon nanodots (CDs) were prepared through a one-step pyrolysis procedure using cysteine as precursor. The as-prepared nanomaterials were characterized by transmission electron microscope (TEM), dynamic light scattering (DLS), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible absorption spectrum (UV-Vis) and fluorescence spectrum (FL). It was turned out that the average size of as-prepared CDs was 3.12 nm and they showed good fluorescence property. Silver ions can bind to the CDs and effectively quench the fluorescence through photoinduced electron transfer (PET). Further, benefitting from its coordination with heavy metal ions, penicillamine combines with Ag+ and makes the latter leave the surface of the carbon dots to achieve fluorescence recovery. Based on this, an Ag+ assisted CDs fluorescent turn-on probe was established to recognize penicillamine. The linear range of this method was 8~500 μmol·L-1 with a detection limit of 5.62 μmol·L-1. The penicillamine content in urine sample was detected and the recovery was in the range of 97.17%~102.05%. |
| Keywords: carbon dots silver ions fluorescence turn-on penicillamine |
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| LI Ling-Fang,WANG Qi.Fluorescent Carbon Dots: Synthesis and Ag+ Assisted Turn-On Recognition of D-Penicillamine[J].Chinese Journal of Inorganic Chemistry,2020,36(11):2055-2062. |
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