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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Spectroscopic studies of the interaction between methylene blue-naphthol orange complex and anionic and cationic surfactants
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Spectroscopic studies of the interaction between methylene blue-naphthol orange complex and anionic and cationic surfactants

机译：亚甲蓝-萘酚橙配合物与阴离子和阳离子表面活性剂之间相互作用的光谱研究

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Initially, the absorbance of MB at 665 nm decreased rapidly with increasing sodium dodecyl sulfate (SDS) concentration, but increased gradually above about 2.3 x 10(-3) M. However, the absorbance of MB was almost independent of the cetyltrimethylammonium bromide (CTAB) concentration. On the other hand, the absorbance of NpO was affected by addition of CTAB in a similar manner to the change in MB-SDS system, but not by addition of SDS. The absorption band of MB showed a small red-shift and a decrease in intensity upon addition of NpO, while that of NpO showed only the decrease in the intensity upon the addition of MB. These spectral changes were attributed to the formation of complexes between these dyes. The effects of anionic and cationic surfactants on the absorption spectra of mixtures of MB and NpO were also examined. Contrary to the effects on the absorption spectrum of MB and NpO, respectively, the absorbances of MB and NpO in the mixtures were changed with the additions of both anionic and cationic surfactants. The spectral changes were explained by changes in the forms of MB and NpO in the solutions with increasing surfactant concentrations. (c) 2006 Elsevier B.V. All rights reserved.
机译：最初，MB在665 nm处的吸光度随十二烷基硫酸钠（SDS）浓度的增加而迅速下降，但在约2.3 x 10（-3）M之上逐渐增加。但是，MB的吸光度几乎与十六烷基三甲基溴化铵（CTAB）无关。 ） 浓度。另一方面，以与MB-SDS系统变化相似的方式，通过添加CTAB来影响NpO的吸光度，但不通过添加SDS来影响。 MB的吸收带显示出小的红移并且在添加NpO时强度降低，而NpO的吸收带仅在添加MB时强度降低。这些光谱变化归因于这些染料之间形成络合物。还检查了阴离子和阳离子表面活性剂对MB和NpO混合物吸收光谱的影响。与分别对MB和NpO的吸收光谱的影响相反，混合物中MB和NpO的吸光度随阴离子和阳离子表面活性剂的添加而变化。光谱变化是通过表面活性剂浓度增加而导致的溶液中MB和NpO形式的变化来解释的。 （c）2006 Elsevier B.V.保留所有权利。

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