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| Study on the Ratiometric Fluorescence Detection of Zn2+ Based on Surfactant Solubilization |
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| DOI：10.3969/j.issn.1004-4957.年份.月份 |
| KeyWord:detection fluorescence ratiometric Zn2+ surfactant solubilization |
| Author | Institution |
| 丁莹，郭祥峰，张宇，贾丽华 |
齐齐哈尔大学黑龙江省普通高校精细化工重点实验室 |
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| Abstract: |
| A novel fluorescent sensor，8-(2-(octadecylamino)acetylamino)quinoline(AQZ-18)，was synthesized for sensing Zn2+.Two fluorescence peaks at 320 nm and 505 nm were observed in the solution of AQZ-18，non-ionic surfactant OP-10 and Zn2+.The shorter wavelength peak arised from autofluorescent OP-10 kept almost unchanged，while the longer wavelength peak produced by AQZ-18 increased gradually with increase of Zn2+ concentrations.Base on this， a new ratiometric method was established by measuring the ratio variations of fluorescence intensities in the two regions.The 1∶1 ground state complex between Zn2+ and AQZ-18 was formed，and the apparent association constant was obtained to be 1.1×106 L/mol.Some common metal ions had no obvious interference for AQZ-18 to detect Zn2+.The ratio of two fluorescence intensities presented a linear relationship with concentration of Zn2+ in the range of 0-1.1×10-5 mol/L(r2=0.996 2)，with a detection limit of 55 nmol/L.The method could be used for the determination of Zn2+ in water samples. |
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