Effect of pH and dye concentration on the n-octanol/water distribution ratio of phenothiazine dyes: a microelectrode voltammetry study

Autor(es)

da Silva, Jessica Soares ^[1] ; Junqueira, Helena Couto ^[2] ; Ferreira, Tiago Luiz ^[1]

Afiliação do(s) autor(es)

^[1] UNIFESP, Inst Ciencias Ambientais Quim & Farmaceut, Diadema, SP - Brazil

^[2] Univ Sao Paulo, Inst Quim, Nucleo Apoio Pesquisa Tecnol Fotoquim, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Electrochimica Acta; v. 144, p. 154-160, OCT 20 2014.
• Citações Web of Science: 4

Resumo

Microelectrode voltammetry was employed to gain information on the n-octanol/water partition ratio of phenothiazine dyes. The data were obtained as a function of pH and dye concentration in aqueous solutions. All the dyes present hydrophobic behavior at pH above 7.0. The analysis of the results shows not only the formation of neutral species in alkaline solution but the association of cationic form of these dyes with OH- play important roles in the partitioning of molecules from aqueous solution to n-octanol. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 11/17587-9 - Utilização de soluções aquosas de tensoativos como catalisadores e moldes para deposição de filmes mesoporosos em superfícies eletródicas
• Beneficiário: Tiago Luiz Ferreira
• Modalidade de apoio: Auxílio à Pesquisa - Regular