基于喹啉希夫碱的水溶液中高选择性的 Al 荧光探针
A highly selective turn-on fluorescent probe for Al in aqueous solution based on quinoline Schiff-base.
机构信息
College of Chemistry, Nanchang University, Nanchang 330031, People's Republic of China.
出版信息
Methods Appl Fluoresc. 2017 Jun 15;5(2):024014. doi: 10.1088/2050-6120/aa7172.
A new Al-specific fluorescent probe NQ was designed and synthesized from 2-hydroxy-1-naphthaldehyde and 2-aminoquinoline. Upon the addition of Al, the fluorescent intensity of NQ was significantly enhanced compared with other examined metal ions in aqueous solution. The result of a Job's plot indicated the formation of a 1:1 complex between the probe and Al, and the possible binding mode of the system between NQ and Al was clarified by IR analysis and H NMR titration. Moreover, other metal ions examined had little effect on the detection of Al. The detection limit of NQ for Al detection was 1.98 μM, which is lower than the level (7.4 μM) in drinking water defined by the World Health Organization. In addition, the fluorescent probe NQ could be recyclable simply through treatment with a proper reagent such as F, and could also be used for the detection of Al in real samples.
一种新的 Al 特异性荧光探针 NQ 是由 2-羟基-1-萘醛和 2-氨基喹啉设计和合成的。在加入 Al 后，与其他考察的金属离子相比，NQ 在水溶液中的荧光强度显著增强。Job 图的结果表明，探针和 Al 之间形成了 1:1 的配合物，并且通过 IR 分析和 H NMR 滴定澄清了体系中 NQ 和 Al 之间的可能结合模式。此外，考察的其他金属离子对 Al 的检测几乎没有影响。NQ 检测 Al 的检测限为 1.98 μM，低于世界卫生组织规定的饮用水标准（7.4 μM）。此外，荧光探针 NQ 可以通过使用适当的试剂（如 F）简单地回收，并且还可以用于实际样品中 Al 的检测。
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