物理化学学报 >> 1996, Vol. 12 >> Issue (03): 268-271.doi: 10.3866/PKU.WHXB19960315

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SDS对C10OMI分子有序组合体及其吸收光谱的影响

于网林,赵国玺   

  1. 北京大学物理化学研究所，北京 100871
  • 收稿日期:1995-04-22 修回日期:1995-08-05 发布日期:1996-03-15
  • 通讯作者:

Effect of SDS on the Organized Assemblies and their Absorption Spectra of C10OMI

Yu Wang-Lin,Zhao Guo-Xi   

  1. Institute of Physical Chemistry,Peking University,Beijing 100871
  • Received:1995-04-22 Revised:1995-08-05 Published:1996-03-15
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关键词: 分子有序组合体, 囊泡, 表面活性剂, 吸收光谱

Abstract:

The morhology of the organized assemblies of C10H21-O-ph-CH=CH-ph-CH3I (C10OMI) in aqueous dispersions is long rod-like or vesicular. In neutral dispersions, addition of sodium dodecylsulfate (C12SO4Na) induces the transition from long rods to vesicles, and hence the closer packing of C10OMI, forming the "H-aggregate" with a blue-shift of absorption spectrum. Under acidic conditions, C12SO4Na makes the vesicles of C10OMI to aggregate: It is suggested that the hydrophobic chain of C12SO4Na does not penetrate into the bilayers of C10OMI at low concentration. When the concentration of C12SO4Na reaches its CMC, C10OMI will be solubilized both in neutral and in acidic dispersions, so that the monomer absorbtion appears.

Key words: Organized molecular assemblies, Vesicle, Surfactant, Absorption Spectrum