A fluorescent pH probe for an aqueous solution composed of 7-hydroxycoumarin, Schiff base and phenanthro[9,10-d] imidazole moieties (PICO)

作者：Li, Shaoxin; Kan, Wei^*; Zhao, Bing^*; Liu, Ting; Fang, Yue; Bai, Liming; Wang, Liyan

来源：Heterocyclic Communications, 2018, 24(2): 93-97.

DOI：10.1515/hc-2017-0174

• off-on
• o-hydroxycoumarin
• phenanthro[9,10-d]imidazole
• pH probe
• tautomerism

The pH fluorescent probe 7-hydroxy-4-methyl-8-(((2-(1-phenyl-1H-phenanthro[9,10-d] imidazol-2-yl)phenyl)imino)methyl)-2H-chromen-2-one (PICO) contains a donor-pi-acceptor (D-pi-A) conjugated system. The 'off-on' probe PICO has a pKa value of 8.01 and its fluorescence intensity is enhanced with increasing pH.

• 出版日期2018-4
• 单位齐齐哈尔大学