کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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745706 | 894428 | 2009 | 4 صفحه PDF | دانلود رایگان |
4-(2,2′-Bipyridine-5-yl)benzaldehyde, compound 1, was designed and readily synthesized as a novel fluorescent reagent for Zn2+ with emission in the near-infrared region. Upon addition of Zn2+, the fluorescent reagent showed significant changes in both absorption and fluorescence spectra, in particular, a marked enhancement in the fluorescent intensity in the near-infrared region. By contrast, most of other metal ions caused only marginal variations in the optical properties of the fluorescent reagent. The job plot indicates that the fluorescent reagent forms a 1:1 complex with Zn2+. The binding constant was calculated to be 4.57 × 104 M−1. Furthermore, the fluorescent reagent was employed to measure the Zn2+ concentrations in real water samples with good accuracy.
Journal: Sensors and Actuators B: Chemical - Volume 135, Issue 2, 15 January 2009, Pages 512–515