基于苯并噻二唑衍生物的荧光传感器检测铜离子和氟离子（英文）

A Fluorescent Sensor for Recognition of Copper Cation and Fluoride Anion Based on Benzothiadiazole Derivative

报道了一种基于苯并噻二唑衍生物的荧光传感器用于检测金属铜离子和氟离子。通过紫外可见光谱和荧光光谱研究此传感器检测离子的能力。研究表明,在所测试的阴离子中,只有氟离子可以引起此荧光探针的吸收峰蓝移(从390 nm到383 nm),并伴随着一定强度的减弱。同样氟离子可以引起此荧光探针的荧光强度降低并且蓝移(从496 nm到488 nm)。在所测试的阳离子中,铜离子可引起荧光探针的吸收峰红移,荧光强度淬灭90%。此外,当加入铜离子和氟离子的先后顺序不同时,引起的荧光光谱变化也不同。

In this paper,a fluorescent probe based on TMS-ethynyl triazolyl benzothiadiazole derivative（BTD）was developed for recognition of copper cation（Cu2＋）and fluoride anion（F-）. Sensing behavior of this probe towards anions and cations was monitored by UV-visible and fluorescent spectroscopies in acetonitrile. Among tested anions,only F-induced a decrease in absorption band with a blue shift from390 nm to 383 nm. Concomitantly,a fluorescence quenching with a blue shift from 496 nm to 488 nm.Among tested cations,Cu^（2＋）led to a decreased absorption band with a red shift and a significant decrease in fluorescent intensity. Interestingly,the fluorescence emission of BTD was highly sensitive to a combination of Cu2＋ and F-in a sequence dependent manner.