双(噻吩-2-亚甲基)苯-1,4-二胺作为荧光探针用于检测水溶液中的 Fe。
Bis(thiophen-2-yl-methylene) Benzene-1, 4-Diamine as Fluorescent Probe for the Detection of Fe in Aqueous Samples.
机构信息
Department of Chemistry, Punjabi University, Patiala-147002, Punjab, India.
Department of Chemistry, College of Natural and Computational Science, Wollega University, Post, Box 395, Nekmete, Ethiopia.
出版信息
J Fluoresc. 2022 May;32(3):1247-1259. doi: 10.1007/s10895-022-02914-5. Epub 2022 Mar 30.
A Schiff base bis(thiophen-2-yl-methylene)benzene-1, 4-diamine (L) was synthesized and used for selective and sensitive detection of Fe. L exhibited enhanced fluorescence response at excitation of 365 nm and emission wavelength of 440 nm for Fe. The formation of a 1:1 complex between L and Fe was suggested by Job's plot by fluorescence titration and from optimized structures using Density functional theory (DFT). The fluorescence intensity was directly proportional to concentration of Fe (R = 0.999) with the detection limit of 3.8 × 10 M and the binding constant of 1.20 × 10 M at pH = 6.0. The probe was used to detect Fe in different water samples with the percentage recovery of 99.7-103%. The interference of the other cations are < 5%.
一种席夫碱双（噻吩-2-亚甲基）苯-1,4-二胺（L）被合成，并用于选择性和灵敏地检测 Fe。L 在 365nm 的激发下和 440nm 的发射波长下对 Fe 表现出增强的荧光响应。通过荧光滴定和使用密度泛函理论（DFT）优化结构的 Job 图，表明 L 和 Fe 之间形成了 1:1 的配合物。荧光强度与 Fe 的浓度成正比（R=0.999），检测限为 3.8×10-7M，在 pH=6.0 时的结合常数为 1.20×105M。该探针用于检测不同水样中的 Fe，回收率为 99.7%-103%。其他阳离子的干扰均小于 5%。
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