光谱学与光谱分析 |
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Nanosilver Sensitized Fluorescence and Second-Order Scattering of Tb(Ⅲ)-Norfloxacin and Its Application |
YANG Zhi-jie1,2,ZHAO Hui-chun1*,DING Fen1,LI Ai-yun1,WANG Xiao-li1 |
1. College of Chemistry, Beijing Normal University, Beijing 100875, China 2. College of Life Sciences and Chemistry, Dali University, Dali 671000, China |
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Abstract Norfloxacin (NFLX) can form complex with Tb(Ⅲ) ion, and the intramolecular energy transfer from NFLX to Tb(Ⅲ) takes place when excited. And thus the characteristic fluorescence of Tb(Ⅲ) ion is enhanced and the maximum fluorescence peak locates at 545 nm. The second-order scattering (SOS) peak at 545 nm also appears for the Tb(Ⅲ)-NFLX complex with the excitation wavelength of 272 nm. When the silver nanoparticles were added to the Tb(Ⅲ)-NFLX binary system, the luminescence intensity at 545 nm greatly increased. And the relative intensity is proportional to the amount of NFLX. Based on this phenomenon, a novel method for the determination of NFLX has been developed by using a common spectrofluorometer to measure the intensity of fluorescence and SOS. The calibration graphs for NFLX are linear in the range of 6.0×10-9-1.0×10-5 mol·L-1,and the detection limit is 4.4×10-9 mol·L-1. This method was applied satisfactorily to the determination of NFLX in capsule and eye drop samples. The experimental results showed that it is the certain size and certain concentration of silver nanoparticles that can greatly enhance the fluorescence-SOS intensity.
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Received: 2006-09-02
Accepted: 2006-11-08
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Corresponding Authors:
ZHAO Hui-chun
E-mail: zhaohuichun@bnu.edu.cn
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Cite this article: |
YANG Zhi-jie,ZHAO Hui-chun,DING Fen, et al. Nanosilver Sensitized Fluorescence and Second-Order Scattering of Tb(Ⅲ)-Norfloxacin and Its Application[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(12): 2534-2537.
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URL: |
https://www.gpxygpfx.com/EN/Y2007/V27/I12/2534 |
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