ELECTROCHEMICAL BEHAVIOUR OF METHYLENE BLUE IN NON-AQUEOUS SOLVENTS

被引：10
作者：
Caram, J. A. [1 ]
Martinez Suarez, J. F. [1 ]
Gennaro, A. M. [2 ,3 ]
Mirifico, M. V. [1 ,4 ]
机构：
[1] Univ Nacl La Plata, Inst Invest Fisicoquim Teor & Aplicadas INIFTA, CCT La Plata, Fac Ciencias Exactas,Dept Quim,CONICET, RA-1900 La Plata, Buenos Aires, Argentina
[2] UNL, Inst Fis Litoral IFIS Litoral, CONICET, RA-3000 Santa Fe, Argentina
[3] Univ Nacl Litoral, Fac Bioquim & Ciencias Biol, Dept Fis, RA-3000 Santa Fe, Argentina
[4] Univ Nacl La Plata, Fac Ingn, Dept Ingn Quim, RA-1900 La Plata, Buenos Aires, Argentina
来源：
ELECTROCHIMICA ACTA | 2015年 / 164卷
关键词：
Cationic dye electro-reduction; Cyclic voltammetry; ESR; Solvent and Supporting electrolyte effects; Reaction mechanism; AQUEOUS-SOLUTIONS; ASCORBIC-ACID; ELECTRODE; DYE; SPECTROSCOPY; AGGREGATION; OXIDATION; SPECTROELECTROCHEMISTRY; DEGRADATION; REDUCTION;
D O I：
10.1016/j.electacta.2015.01.196
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The electrochemical behaviour of methylene blue in solution of non-aqueous solvents with different supporting electrolytes was studied by cyclic voltammetry. Dye electro-reduction presents two well-defined processes of monoelectronic charge transfer yielding a free radical in the first process and an anion in the second electron transfer. Free radical and anion are long living species in some of the studied media. Effects of supporting electrolyte and solvent on the peak potentials, the peak current functions and the reversibility of the charge transfer processes are reported. A dissociation equilibrium of the dye in solution of non-aqueous solvents and the acid or base added determine markedly the electrochemical responses. In the particular cases of KOH/DMF or EDA basic media the chemical formation of the stable methylene blue radical was detected and it was characterized by EPR spectroscopy. A general reaction scheme is proposed. (C) 2015 Elsevier Ltd. All rights reserved.
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页码：353 / 363
页数：11
相关论文
共 42 条
  • [1] Electrodegradation of methylene blue dye in water and wastewater using lead oxide/titanium modified electrode
    Abu Ghalwa, Nasser M.
    Zaggout, Farid R.
    [J]. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING, 2006, 41 (10): : 2271 - 2282
  • [2] Adamcíková L, 1999, INT J CHEM KINET, V31, P463, DOI 10.1002/(SICI)1097-4601(1999)31:6<463::AID-KIN8>3.0.CO
  • [3] 2-2
  • [4] UV-Vis spectroscopic and chemometric study on the aggregation of ionic dyes in water
    Antonov, L
    Gergov, G
    Petrov, V
    Kubista, M
    Nygren, J
    [J]. TALANTA, 1999, 49 (01) : 99 - 106
  • [5] Electrochemical study of methylene blue incorporated into mordenite type zeolite and its application for amperometric determination of ascorbic acid in real samples
    Arvand, M
    Sohrabnezhad, S
    Mousavi, MF
    Shamsipur, M
    Zanjanchi, MA
    [J]. ANALYTICA CHIMICA ACTA, 2003, 491 (02) : 193 - 201
  • [6] Bard A.J., 2001, ELECTROCHEMICAL METH, P514
  • [7] Bard A.J., 2001, ELECTROCHEMICAL METH, P489
  • [8] Electrosynthesis and electrochemical characterisation of phenazine polymers for application in biosensors
    Barsan, Madalina M.
    Pinto, Edilson M.
    Brett, Christopher M. A.
    [J]. ELECTROCHIMICA ACTA, 2008, 53 (11) : 3973 - 3982
  • [9] ELECTRON-TRANSFER KINETICS AT MODIFIED CARBON ELECTRODE SURFACES - THE ROLE OF SPECIFIC SURFACE SITES
    CHEN, PH
    FRYLING, MA
    MCCREERY, RL
    [J]. ANALYTICAL CHEMISTRY, 1995, 67 (18) : 3115 - 3122
  • [10] Danly D.E., 1991, ORGANIC ELECTROCHEMI, P1285
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