Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10145590 | Journal of Electroanalytical Chemistry | 2018 | 6 Pages |
Abstract
Indole-based squaraine (ISQ) is a promising group of electroactive dyes that have been widely used as organic photoelectric materials. However, their chemical structure is stable and will cause environmental pollution after being released into nature. Herein, the electrochemical redox chemistry of ISQ and its degradation mechanism on a Pt polycrystalline electrode was investigated. Many results are obtained from voltammograms, electrochemical in-situ UV-Vis and FTIR spectra and quantum chemical calculations: 1) while the potentials were below 1.2â¯V, ISQ was first oxidized to the radical anion with CO bond formation whereas oxidation shows fully electrochemical irreversibility. 2) an unexpected IR band of CO2 was collected at increasing potentials whereas a new absorption of 420â¯nm appeared in UV-Vis spectra, suggesting that cleavage of the CC double bond had occurred in the molecular structure of ISQ. 3) The oxidation products of ISQ were 1âmethylâ3,3âdimethylndoleniumâ2âone and 3âoxoâcyclobutâ1âenol anion. These findings provide useful information for better understanding the reaction mechanism and designing a suitable treatment strategy for dye pollutants.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Le-Xing You, Lu Wang, Le Zhang, Xiao-Xue Jiang, Su-Fang Qin, Christoper Rensing, Nan-Yan Fu, Jian-Jun Sun,