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Citation: Yu Wang-Lin, Zhao Guo-Xi. Effect of SDS on the Organized Assemblies and their Absorption Spectra of C₁₀OMI[J]. Acta Physico-Chimica Sinica, ;1996, 12(03): 268-271. doi: 10.3866/PKU.WHXB19960315 shu

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 Date: 22 April 1995
Available Online: 15 March 1996

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.
- Organized molecular assemblies,
- Vesicle,
- Surfactant,
- Absorption Spectrum
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Effect of SDS on the Organized Assemblies and their Absorption Spectra of C10OMI

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