期刊
MICROCHIMICA ACTA
卷 185, 期 9, 页码 -出版社
SPRINGER WIEN
DOI: 10.1007/s00604-018-2961-9
关键词
Nanobranched carbon-based polymers; Multielement; Nitrogen doping; Phosphorus doping; On-off-on; Pharmaceuticals
资金
- National Natural Science Foundation of China [21705140, 21575123, 21675139, 21603184]
- Natural Science Foundation of Jiangsu Province [BK20170474]
- Qing Lan Project and the Innovative Research Project of Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education
- opening project of Jiangsu Key Laboratory of Biochemistry and Biotechnology of Marine Wetland [K2016-17, K2016-20]
The authors describe the synthesis of fluorescent coral-like carbon nano-branched polymers (PCNBPs) co-doped with nitrogen and phosphorus. Uric acid and phosphoric acid act as nitrogen and phosphorus sources, respectively. The PCNBPs have a coral-like branched structure, are cross-connected, and < 20 nm in skeleton diameter. Their blue fluorescence, best measured at excitation/emission wavelengths of 330/425 nm, is quenched by mercury (II) ions due to the specifically restricted rigid conformation caused by the interaction of phosphorus, nitrogen, and oxygen groups on the surface of the PCNBPs. Fluorescence is selectivity quenched by Hg(II) but restored in addition of the hypertension drug captopril (CAP) in the range 50 nM to 40 mu M concentration range. Fluorescence recovery is attributed to the effectively specific interactions between the thiol group of CAP and Hg(II). The method was applied to the determination of the concentration of Cap in pharmaceutical samples, and recoveries were between 97.6 and 105.1%.
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