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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Spectrophotometric studies of anionic dye-cationic surfactant interactions in mixture of cationic and nonionic surfactants
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Spectrophotometric studies of anionic dye-cationic surfactant interactions in mixture of cationic and nonionic surfactants

机译：阳离子和非离子表面活性剂混合物中阴离子染料-阳离子表面活性剂相互作用的分光光度法研究

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摘要

The interaction between an anionic dye C.I. Reactive Orange 16 (RO16) and a cationic surfactant dodecylpyridinium chloride (DPC) in mixtures of DPC and nonionic surfactants poly(oxyethylene)ethers (CmPOEn; m = 12, 16 and 18, n = 4, 10 and 23) are investigated spectrophotometrically in a certain micellar concentration range. The spectrophotometric measurements of dye-surfactant systems are carried out as function of mole fraction of surfactant at four different temperatures. For this reason, a typical system was occurred at 1.0 x 10(-2) mol l(-1) for surfactants and at 1.0 x 10(-4) mol l(-1) for dye concentrations. The formation of DPC-RO16 complex in the CmPOEn solutions of different mole fractions in its micellar concentration range have been determined and compared to those obtained in the binary mixtures. From the spectrophotometric measurements has been observed that the addition of nonionic surfactant in to the mixture of DPC-RO16, causes a significant increase of the value of absorbance. This increase explains that the stability of DPC-RO16 complex is reduced in the presence of nonionic surfactant micelles. It can be seen from results; in mixed surfactant solutions, there are DPC-CmPOEn and RO16-CmPOEn interactions in addition to DPC-RO16 interaction. Since the solubilizaton of the DPC-RO16 complex has been appeared in the CmPOEn, solution, our results support the conclusion that adding CmPOEn influences the hydrophobic-hydrophylic balance of the studied complex. Furthermore effect of the alkyl chain length and the number of poly(oxyethylene) in nonionic surfactant on values of absorbance have been investigated. (C) 2004 Elsevier B.V. All rights reserved.
机译：阴离子染料C.I.之间的相互作用。用分光光度法研究了活性橙16（RO16）和DPC与非离子表面活性剂聚氧乙烯醚（CmPOEn; m = 12、16和18，n = 4、10和23）的混合物中的阳离子表面活性剂十二烷基吡啶鎓氯化物（DPC）。一定的胶束浓度范围。染料表面活性剂体系的分光光度法测量是在四个不同温度下表面活性剂摩尔分数的函数。因此，对于表面活性剂，典型的体系发生在1.0 x 10（-2）mol l（-1），对于染料浓度，发生在1.0 x 10（-4）mol l（-1）。已经确定了在胶束浓度范围内不同摩尔分数的CmPOEn溶液中DPC-RO16络合物的形成，并将其与二元混合物中的形成相比较。从分光光度法测量中已经观察到，将非离子表面活性剂添加到DPC-RO16的混合物中会导致吸光度值显着增加。这种增加说明在非离子表面活性剂胶束的存在下，DPC-RO16复合物的稳定性降低了。从结果可以看出;在混合表面活性剂溶液中，除DPC-RO16相互作用外，还有DPC-CmPOEn和RO16-CmPOEn相互作用。由于DPC-RO16复合物的增溶作用已出现在CmPOEn溶液中，因此我们的结果支持以下结论：添加CmPOEn影响所研究复合物的疏水-亲水平衡。还研究了烷基链长度和非离子表面活性剂中聚氧乙烯的数量对吸光度值的影响。 （C）2004 Elsevier B.V.保留所有权利。

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