Highly selective and sensitive colorimetric chemosensor based on tricarboyanine for detection of Ag⁺ in industrial wastewater

Abstract

Abstract

An efficient fluorescent probe 1 based on tricarbocyanine derivative was designed and synthesized, which can detect Ag⁺ in real industrial wastewater. UV-Vis absorption and fluorescent emission spectra of probe 1 were carried out and indicated this probe can bind Ag⁺ via complexation reaction, then leading to a remarkable color change from blue to light red. Furthermore, probe 1 showed high sensitive performance and excellent selectivity toward Ag⁺ over other common metal ions in neutral pH. The sensing mechanism was proposed and further confirmed by ¹H NMR, which demonstrate analyte-induced destruction of the π-electron system could be shorten by the disruption of the pull-push π-conjugation system in probe 1. Moreover, a test strip was prepared by filter paper immersing in probe 1 solution, which further provide its potential application for trace Ag⁺ detection in real industrial wastewater.

Graphical abstract

Funding

National Natural Science Foundation of China(21808028)

Science and Technology Foundation of Liaoning Province(2019-BS-047)

Fundamental Research Funds for the Central Universities(2018011013)