期刊
MICROCHIMICA ACTA
卷 182, 期 7-8, 页码 1527-1534出版社
SPRINGER WIEN
DOI: 10.1007/s00604-015-1463-2
关键词
CdTe; Polymer; Selective; Recognition; Aspirin
资金
- National Natural Science Foundation of China [21107037, 21176107, 21174057, 21277063, 21407057, 21407064]
- National Basic Research Program of China (973 Program) [2012CB821500]
- Natural Science Foundation of Jiangsu Province [BK20140535]
- Ph.D. Innovation Programs Foundation of Jiangsu Province [KYLX_1032]
- National Postdoctoral Science Foundation [2014 M561595]
- Postdoctoral Science Foundation of Jiangsu Province [1401108C]
A molecularly imprinted polymer (MIP) was deposited on the surface of CdTe quantum dots (QDs) to act as a recognition element for aspirin. The MIP was synthesized from 3-aminopropyltriethoxysilane as the functional monomer, aspirin as the template, and tetraethoxysilane as the cross-linker via a sol-gel process that leads to surface imprinting. It is shown that the fraction of QDs and the polymerization process affect size and morphology of the MIP-coated QDs. The optical stability, effects of pH, detection time and selective determination of aspirin were optimized. The fluorescence intensity of the particles (photoexcited at 400 nm and measured at 628 nm) decreases linearly with increasing concentration of aspirin in the 2.0-50 mu mol L-1 range. The limit of detection (at an S/N of 3) is 0.25 mu mol L-1. The method was successfully applied to the determination of aspirin in human urine and saliva.
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