A Novel Tetraphenylethylene-Based "Turn On" Fluorescent Sensor with Highly Sensitive Response to Mercury Ions

• 作者: GUI Meifang LIU Tianbao PENG Yanfeng WANG Xin ZHANG Min
• 来源期刊: 武汉大学自然科学学报（英文版）
• 学科: 化学
• 年，卷（期）: 2020,（5）
• 所属期刊栏目: Chemistry
• 页码范围: 417-422
• 页数: 6页
• 分类号: O657
• 语种: 英文
• DOI: 10.19823/j.cnki.1007-1202.2020.0049

摘要

A novel 4-tert-butyl-N'-(4-(1,2,2-triphenylvinyl) benzylidene) benzohydrazide (TBB) was successfully synthesized in simple one-step process.It was characterized by FT-IR,1H NMR,13C NMR and HRMS.Its fluorescence sensing ability to 15 metal ions was investigated.Weak emission from TBB could be efficiently increased by trace Hg2+,through coordination reaction between TBB and Hg2+ with "turn on" character.The fluorescence intensity of TBB/Hg2+ ([TBB]=3.0× 10-6 mol/L,[Hg2+]=1.3 × 10-4 mol/L) was 7.5 times higher than that of TBB.This TBB sensor exhibited high selectivity for Hg2+ and other metal ions did not interfere in this determination.The limit of detection was 0.566 μmol/L (S/N=3).The experimental results showed that this TBB sensor could sensitively respond to Hg2+ within concentration range (from 5 × 10-6 mol/L to 1.3 × 10-4 mol/L).