期刊
DYES AND PIGMENTS
卷 97, 期 3, 页码 475-480出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2013.02.005
关键词
Fluorescent sensor; Benzimidazole; Ratiometric; Cr3+; Fe3+; Aqueous solution
资金
- National Natural Science Foundation of China [21272085]
A novel ratiometric fluorescent sensor bearing two benzimidazole groups has been synthesized. The sensor showed a ratiometric fluorescence response with an enhancement of the ratios of emission intensities at 443 and 378 nm from 0.17 to 3.21 for Cr3+. The ratios of emission intensities at 443 and 380 nm were enhanced from 0.40 to 2.09 for Fe3+. Fe3+ revealed significant adsorption in the UV-vis region, which can be used to discriminate Cr3+ and Fe3+. Detection limits of the method for Cr3+ and Fe3+ were 25 mu M and 2 mu M, respectively. In addition, the sensor showed good selectivity to Cr3+ and Fe3+ over other metal ions. (C) 2013 Elsevier Ltd. All rights reserved.
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