SDS对C10OMI分子有序组合体及其吸收光谱的影响

分子有序组合体的功能性在很大程度上取决于两亲分子聚集的形式．含有生色基团的两亲分子，其电子吸收光谱会随分子有序化排列方式的不同而发生显著变化，这已为很多实验所证实［’－4］，并应用激于态理论问进行了定性和半定量的说明．这种与分子有序化排列相关的电子光谱变化

Effect of SDS on the Organized Assemblies and their Absorption Spectra of C_(10)OMI

The morhology of the orgainzed assemblies of C10p21-O-CH-CH-CH3I (C10OMI) in aqueous dispersions is long rod-like or vesicular. In neutral dinseds, addi-tion of sodium dodecylsulfate (C12 SO4Na) induces the transition from long rods to de,and hence the closer packing of C10OMI, forming the "H-aggregate" wte-shift ofabsorption spectrum. Under acidic conditions, C12SO4Na makes the vesicles of C10OMIto aggregate:It is suggested that the hydrophobic chain of C12SO4Na does not penetrateinto the bilayers of C10OMl at low concentration. When the concentration of C12SO4Nareaches its CMC, C10Orn will be solubilized both in neutral and in acidic dispersions, sothat the monomer absorbtion appears.