一种基于萘酰胺的荧光探针，用于高灵敏度和选择性检测 Al、Fe 和 CN。
A naphthylamide based fluorescent probe for detection of Al, Fe, and CN with high sensitivity and selectivity.
机构信息
Department of Chemistry, Isfahan University of Technology, Isfahan 8415683111, Iran.
Department of Chemistry, Isfahan University of Technology, Isfahan 8415683111, Iran.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Mar 5;228:117753. doi: 10.1016/j.saa.2019.117753. Epub 2019 Nov 6.
A naphthylamide based fluorescent chemosensor, N,N'-(1,2-phenylene)bis(1-hydroxy-2-naphthamide) (HL), for detection of Fe and Al cations as well as CN anion is reported. This compound has been synthesized by a novel and facile synthetic method with high yield and characterized by FT-IR, H NMR, elemental analysis, and UV-Vis spectroscopy. It could detect Fe and Al ions in different media with different excitation and emission wavelengths. In DMSO solution, HL showed selective ON-OFF quenching of its 451 nm emission in the presence of Fe. On the other hand, in DMF solution, HL exhibited selective OFF-ON fluorescence upon the addition of Al, the intensity at 429 nm increases drastically by 24-fold. Also, among the anions, the probe can selectively distinguish CN by deprotonation of OH and NH groups, as proved by H NMR titration. TD-DFT calculation supports the UV-Vis and fluorescence measurements of the chemosensor.
本文报道了一种基于萘酰胺的荧光化学传感器 N,N'-(1,2-亚苯基)双(1-羟基-2-萘甲酰胺)（HL），用于检测 Fe 和 Al 阳离子以及 CN 阴离子。该化合物采用新颖、简便的合成方法合成，产率高，并通过傅里叶变换红外光谱（FT-IR）、核磁共振氢谱（H NMR）、元素分析和紫外-可见光谱（UV-Vis 光谱）进行了表征。它可以在不同的介质中，以不同的激发和发射波长检测 Fe 和 Al 离子。在 DMSO 溶液中，HL 在存在 Fe 时，其 451nm 发射显示出选择性的 ON-OFF 猝灭。另一方面，在 DMF 溶液中，HL 对 Al 的加入表现出选择性的 OFF-ON 荧光，429nm 处的强度急剧增加了 24 倍。此外，在阴离子中，探针可以通过 OH 和 NH 基团的去质子化来选择性地区分 CN，这一点通过 H NMR 滴定得到了证明。TD-DFT 计算支持化学传感器的紫外-可见和荧光测量。
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