Wang Lei, Ye Dandan, Li Wenxuan, Liu Yuanyuan, Li Longhua, Zhang Wenli, Ni Liang
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2017 Aug 5;183:291-297. doi: 10.1016/j.saa.2017.04.056. Epub 2017 Apr 20.
A new rhodamine B hydrazone derivative (probe L) was synthesized and characterized. The probe L had sufficiently satisfactory selective response to Fe and Cu ions among various interferential metal ions, and high sensitivity with the detection limit of 4.63×10M and 5.264×10M for Fe and Cu ions, respectively. In the presence of Fe, the probe L exhibited turn-on orange fluorescence accompanied by color change from colorless to pink. Toward Cu, the probe L showed significant color change from colorless to red purple. These remarkable orange fluorescence and color change made probe L suitable naked-eye identify for Fe and Cu ions. By means of Job's plot, Benesi-Hildebrand studies and FTIR spectra, both 1:1 binding modes (L-Fe and L-Cu) were confirmed. The coordination mechanism and turn on/off fluorescence for L-Fe and L-Cu complexes were well explained by theoretical calculations. Moreover, probe L could be used as a quick, simple, visual test strip for Fe and Cu detection.
合成并表征了一种新型罗丹明B腙衍生物（探针L）。在各种干扰金属离子中，探针L对Fe和Cu离子具有足够令人满意的选择性响应，对Fe和Cu离子具有高灵敏度，检测限分别为4.63×10⁻⁸M和5.264×10⁻⁸M。在Fe存在下，探针L呈现开启的橙色荧光，同时伴随着颜色从无色变为粉红色。对于Cu，探针L显示出从无色到红紫色的显著颜色变化。这些显著的橙色荧光和颜色变化使探针L适用于肉眼识别Fe和Cu离子。通过Job曲线、Benesi-Hildebrand研究和FTIR光谱，证实了两种1:1的结合模式（L-Fe和L-Cu）。理论计算很好地解释了L-Fe和L-Cu配合物的配位机制和荧光开关。此外，探针L可作为一种快速、简单的用于检测Fe和Cu的可视试纸。
