基于蒽荧光团的汞离子化学探针的合成与性能研究

Synthesis and properties of mercury ion chemical probes based on anthracene fluorescence

设计并合成了一种基于乙硫醇和醛类脱保护的荧光传感器分子,随着汞离子的加入,其荧光发射波长从426nm移动至510 nm,可实现裸眼识别,推断机理为分子内电荷转移(ICT)过程.相对其他常见的重金属离子,该传感器分子对Hg^(2+)展现出很高选择性、灵敏性和很快的响应速度.它对Hg^(2+)的响应时间仅仅需要50 s.同时,在最佳的实验条件下,探针分子对Hg^(2+)的检测限为0.091 7 mg/L.

A fluorescent sensor molecule based on ethidium mercaptan and aldehyde deprotection was designed and synthesized.With the addition of mercury ions,the fluorescence emission wavelength shifted from 426 to 510 nm,and the mechanism of intramolecular charge transfer(ICT)process.Relative to other common heavy metal ions,the sensor molecule exhibits high selectivity,sensitivity and rapid response to Hg 2+.Its response time to Hg 2+ions only takes 50 seconds.At the same time,under the optimal experimental conditions,the detection limit of Hg 2+of the probe is 0.091 7 mg/L.