Electrochemical Behavior of Malachite Green in Aqueous Solutions of Ionic Surfactants

Abstract

Electrochemical behavior of malachite green (MG) oxalate in aqueous solution was studied in the presence of a cationic surfactant, cetyltrimethylammonium bromide (CTAB), and an anionic surfactant, sodium dodecyl sulfate (SDS) at a glassy carbon electrode using cyclic voltammetry. The electrochemical oxidation of MG has been characterized as an electrochemically irreversible diffusion-controlled process. Oxidative peak current sharply decreased with increasing SDS concentration, while a slight increase with increasing [CTAB] was apparent. The apparent diffusion coefficient, the surface reaction rate constant, and the electron transfer coefficient of MG clearly show correlation of the electrochemical behavior with the dissolved states of the surfactants. Electrochemical observations together with spectrophotometric results at varying surfactant concentrations provide evidence of interaction of MG with the surfactants to varying extent depending on the type of the surfactant and the concentration.

Role of manganese-based surfactant towards solubilization and photophysical properties of fluorescein

“…There are several metal complexes and organic dyes such as porphyrins, 1,2 transition metal complexes, 3,4 fluorescent dyes 5,6 and phthalocyanine 7 which are used as sensitizers in various photochemical and phototherapeutic applications. 14 Surfactants at concentrations higher than the critical micelle concentration (cmc) have been extensively used with dyes/photosensitizers for various applications using spectroscopic (ultra-violet, fluorescence, phosphorescence, atomic spectroscopy), electroanalytical 15 and separation methods. Among them xanthene dyes, fluorescein is one of the most common fluorescent probe because of its high molar absorpitivity and photostability.…”

“…Fluorescent probes are widely studied to examine the physicochemical properties of micelles and environmental effects. 14 Surfactants at concentrations higher than the critical micelle concentration (CMC) have been extensively used with dyes/ photosensitizers for various applications using spectroscopic (ultra-violet, uorescence, phosphorescence, atomic spectroscopy), electroanalytical 15 and separation methods. There are numerous studies that show the inuence of various nonionic, anionic and cationic surfactants on the photophysical properties of dye.…”

Electrochemical Behaviour of 5-Methyl-4-(2-Thiazolylazo)-Resorcinol in Micellar Media

“…Many researchers investigated the reduction mechanism and the number of electrons transferred in the reduction of azo dyes in aqueous and non-aqueous media (Karaman 2012(Karaman , 2014. Despite the importance of surfactant effects on electrochemical and spectroscopic properties of dyes, there is limited information available in the literature (Gomes et al 1999, Rahman et al 2013, Dash et al 2021. Our study discusses the effects of various surfactants on both the spectroscopic and electrochemical behavior of azo dye.…”

Cyclic voltammetric behavior of crystal violet in aqueous solution: Correlation with dissolved states of cetyltrimethylammonium bromide

“…Yeh (1976) also solubilized a redox probe in micelles to estimate micellar diffusion coefficients of Tween 20 (Yeh, 1976). Rahman et al (2013) examined the electrochemical behavior of MG in an aqueous solution with cetyltrimethylammonium bromide (CTAB), a cationic surfactant, and sodium dodecyl sulfate (SDS), an anionic surfactant. Using a GCE in the experiments, they observed important interactions between MG and various surfactants.…”

“…in a wide range, including concentrations below, above, and far above the CMC, with the CMC value of CTAB being 9.2 ×10 -4 M at 25.0 ºC(Rahman et al, 2013). Due to the salting out effect(Shahid et al, 2009), the addition of NaCl brings about a decrease in the CMC of CTAB in aqueous solutions, and the concentrations of 1.5×10 -3 M or above of CTAB used in this work can be regarded as concentrations above the CMC(Haque et al, 2011).…”