AGGREGATION OF DYE MOLECULES IN AQUEOUS SOLUTION A POLAROGRAPHIC STUDY
AGGREGATION OF DYE MOLECULES IN AQUEOUS SOLUTION A POLAROGRAPHIC STUDY
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DOI：
10.1039/tf9656100374
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发表时间：
1965-01-01
影响因子：
--
通讯作者：
MCKAY, RB
中科院分区：
文献类型：
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作者：
HILLSON, PJ;MCKAY, RB
用极谱技术研究了染料在惰性盐过量存在的水溶液中的聚集现象。通过比较染料给出的极限电流（当到达电极的所有电活性离子或分子都被还原时）与相同摩尔浓度的镉离子给出的极限电流，染料的扩散系数可以与镉离子的（已知的）扩散系数进行比较。通过对大量物质的分子量的对数与扩散系数的对数之间的经验线性关系，从其扩散系数推导出聚集体的分子量。对四种特性良好的“纺织”染料（即：刚果红、结晶紫、亚甲基蓝和索尔威超蓝B）的测试表明，上述技术是可靠的，并给出了可重复的结果，与这些染料在过量电解质存在下聚集的数据非常一致。
The aggregation of dyes in aqueous solution in the presence of an excess of inert salt has been studied by a polarographic technique. By comparing the limiting current (when all the electroactive ions or molecules reaching the electrode are reduced) given by a dye with that given by the same molar concentration of cadmium ions, the diffusion coefficient of the dye can be compared with that of the (known) diffusion coefficient of cadmium ions. The molecular weight of the aggregate was deduced from its diffusion coefficient by means of an empirical linear relationship between the logarithm of molecular weight and the logarithm of the diffusion coefficient for a large number of substances.Tests with four well-characterized" textile" dyes, viz: Congo Red, Crystal Violet, Methylene Blue and Solway Ultra Blue B have shown that the above technique is reliable and gives reproducible results which agree well with data available for the aggregation of these dyes in the presence of an excess of electrolyte.