基于席夫碱的简单比色和荧光传感器对Cu(2+)和F(-)的双通道检测
Dual-channel detection of Cu(2+) and F(-) with a simple Schiff-based colorimetric and fluorescent sensor.
作者信息
Na Yu Jeong, Choi Ye Won, Yun Jin Yeong, Park Kyung-Min, Chang Pahn-Shick, Kim Cheal
机构信息
Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials, Seoul National University of Science and Technology, Seoul 139-743, Republic of Korea.
Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 151-742, Republic of Korea.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2015 Feb 5;136 Pt C:1649-57. doi: 10.1016/j.saa.2014.10.060. Epub 2014 Oct 24.
A simple and easily synthesized colorimetric and fluorescent receptor 1, based on 4-diethylaminosalicylaldehyde moieties as a binding and signaling unit, has been synthesized and characterized. The receptor 1 has a selective colorimetric sensing ability for copper (II) ion by changing color from colorless to yellow in aqueous solution, and could be utilized to monitor Cu(II) over a wide pH range of 4-11. In addition, the detection limit (12μM) of 1 for Cu(2+) is much lower than that (30μM) recommended by WHO in drinking water, and its copper complex could be reversible simply through treatment with a proper reagent such as EDTA. Moreover, receptor 1 exhibited both a color change from colorless to yellow and fluorescence enhancement with a red shift upon addition to F(-) in DMSO. The recognition mechanism was attributed to the intermolecular proton transfer between the hydroxyl group of the receptor and the fluoride.
一种基于4-二乙氨基水杨醛部分作为结合和信号单元的简单且易于合成的比色和荧光受体1已被合成并表征。受体1在水溶液中通过从无色变为黄色对铜（II）离子具有选择性比色传感能力，并且可用于在4 - 11的宽pH范围内监测Cu（II）。此外，1对Cu（2+）的检测限（12μM）远低于世界卫生组织推荐的饮用水中（30μM）的检测限，并且其铜配合物可以通过用适当的试剂如EDTA处理而简单地可逆。此外，受体1在加入DMSO中的F（-）时表现出从无色到黄色的颜色变化以及荧光增强和红移。识别机制归因于受体的羟基与氟化物之间的分子间质子转移。
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