摘要
设计合成了含有酚羟基的萘吖嗪类荧光探针分子,利用紫外-可见吸收光谱和荧光发射光谱研究了探针分子的阴离子识别和光化学传感性能.研究结果表明,该探针分子可以通过比色(紫外-可见吸收光谱)和荧光发射光谱双通道识别检测氟离子.该探针分子是一类比率型阴离子荧光探针,作用方式为探针分子酚羟基的去质子化作用,这种激发态质子转移(ESIPT)是探针分子呈现比率荧光特性的原因.通过本实验不但可以让学生掌握紫外-可见吸收光谱和荧光发射光谱仪的使用方法,还能培养学生在分子识别与光化学传感领域的科研兴趣.
Azines based fluorescent sensor with phenolic OH as recognition sites was synthesized and characterized, the anions binding and sensing abilities of which were studied by UVvis absorption and fluorescent emission spectrum. The results indicated that the sensor could detect fluoride anions by colorimetric and fluorescent methods. Compound 1 could act as a ratiometric fluorescent sensor for anions, due to the deprotonation of OH, and the excited state intramolecular proton transfer(ESIPT) mechanism was responsible for the ratiometric fluorescence change. Through this experiment, not only allows students to master how to operate the UV-visible absorption and fluorescence emission spectrophotometers, but also to cultivate the research interest in the field of molecular recognition and photochemical sensing.
出处
《化学教育》
北大核心
2017年第18期39-43,共6页
Chinese Journal of Chemical Education
关键词
荧光探针
阴离子识别
比色
比率荧光
fluorescent sensor
anion recognition
colorimetric
ratiornetric fluorescence
