A novel fluorescent sensor derived from benzimidazo[2,1-a]benz[de] isoquinoline-7-one-12-carboxylic acid for Cu2+, Cd2+ and PPi

作者：Liu, Zheng; Peng, Cuina; Lu, Zhenxing; Yang, Xiaofeng; Pei, Meishan; Zhang, Guangyou^*

来源：Dyes and Pigments, 2015, 123: 85-91.

DOI：10.1016/j.dyepig.2015.07.027

• Fluorescent sensor
• Benzimidazo[2,1-a]benz[dejisoquinoline-7-one
• Cu2+
• Cd2+
• PPi
• DFT

Fluorescent sensor of N,N-bis(pyridin-2-ylmethyl)benzimidazo[2,1-a]benz[delisoquinoline-7-one-12-carboxamide (L) was prepared. L not only showed fluorescence quenching towards Cu2+ with a detection limit of 1.2 x 10(-8) mol/L in acetonitrile-H2O (9:1) buffer solution, but also showed fluorescence turn-on response with a blue shift towards Cd2+ with a detection limit of 1.5 x 10(-7) mol/L in the same condition. Moreover, the new formed [Cu(L)] complex was found to act as a selective 'turn-on' fluorescent probe for pyrophosphate (PPi) with detection limit of 8 x 10(-9) mol/L, and [Cd(L)] complex was found to act as a selective colorimetric fluorescent probe for PPi with detection limit of 2.4 x 10(-8) mol/L. Such behaviors confirmed L could be applied as fluorescent sensor to detect Cu2+, Cd2+ and PPi based on different mechanisms. The different binding mode and sensing mechanism of L with Cu2+ and Cd2+ was verified by DFT/TDDFT calculation using Gaussian 09.

• 出版日期2015-12
• 单位济南大学