Effect of pH and dye concentration on the n-octanol/water distribution ratio of phenothiazine dyes: a microelectrode voltammetry study
Effect of pH and dye concentration on the n-octanol/water distribution ratio of phenothiazine dyes: a microelectrode voltammetry study
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DOI：
10.1016/j.electacta.2014.08.094
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发表时间：
2014-10
影响因子：
6.6
通讯作者：
J. Silva;Helena C. Junqueira;T. L. Ferreira
中科院分区：
文献类型：
--
作者：
J. Silva;Helena C. Junqueira;T. L. Ferreira
用微电极伏安法测定了吩噻嗪染料的正辛醇/水分配比。得到的数据是水溶液中pH和染料浓度的函数。所有染料在pH>7.0时均表现出疏水行为。对结果的分析表明，这些染料不仅在碱性溶液中形成中性物种，而且阳离子形式与OH-−的缔合作用在分子从水溶液到正辛醇的分配中起着重要作用。
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.