Highly Selective and Sensitive Detection of Fe3+ by 1,8-Naphthalimide-Based Fluorescent Sensors
作者:Shuping Wang、Dongmei Xu
DOI:10.14233/ajchem.2013.14344
日期:——
Highly selective and sensitive detection of Fe3+ by two 1,8-naphthalimide-based fluorescent sensors, 2-(2-(dimethylamino)ethyl)-6-((2-(dimethylamino)ethyl)-amino)-1H-benzo[ de]isoquinoline-1,3(2H)-dione (MMN) and 2-(2-(diethylamino)ethyl)-6-((2-(diethylamino)-ethyl)amino)-1H-benzo[de]isoquinoline-1,3(2H)-dione (EEN) in N,N-dimethyl formamide is reported. The fluorescence intensity of MMN and EEN is greatly enhanced by Fe3+ ion with the response time of less than 1s. The maximum fluorescence intensity of the sensors is linearly dependent on the concentration of Fe3+ within the range of 10-100 μM. The binding stoichiometry indicates that a 2:1 complex is formed between Fe3+ and the sensor and the detection limits for MMN and EEN are 180 and 310 nM, respectively. A large number of biologically relevant ions show no obvious interferences with the detection.
报道了通过两种基于1,8-萘酰亚胺的荧光传感器对Fe3+的高度选择性和敏感检测,分别为2-(2-(二甲氨基)乙基)-6-((2-(二甲氨基)乙基)氨基)-1H-苯并[de]异喹啉-1,3(2H)-二酮(MMN)和2-(2-(二乙氨基)乙基)-6-((2-(二乙氨基)乙基)氨基)-1H-苯并[de]异喹啉-1,3(2H)-二酮(EEN)在N,N-二甲基甲酰胺中的表现。MMN和EEN的荧光强度因Fe3+离子显著增强,响应时间不足1秒。传感器的最大荧光强度在线性范围内与Fe3+浓度(10-100 μM)成正比。结合化学计量表明Fe3+与传感器之间形成2:1的复合物,MMN和EEN的检测限分别为180和310 nM。大量生物相关离子对检测没有明显干扰。