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Formation of Micelles and Their Sphere-rod Transition of Alkylpyridinium Halides

烷基吡啶卤化物胶束的形成及其球棒转变

基本信息

批准号：
03453007
负责人：
IKEDA Shoichi
金额：
$ 4.22万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

项目摘要

Abbreviations: dodecylpyridinium halide X=C: Cl, X=B: Br, X=I: ILight scattering from aqueous solutions of DPC an DPB increases with increasing salt concentration up to 1.0 M NaCl and 0.5 M NaBr, respectively, and then it decreases with increasing salt concentration further. The micelle aggregation number of DPC is as low as 18.6 in water, suggesting formation of porus micelles, and it is 43.5 in 0.05 M NaCl and increases to 71.9 in 4.0 M NaCl, indicating that spherical micelles are formed. On the otherhand, the micelle aggregation number of DPB is 46.0 in water and increases to 70.7 in 0.3 M NaBr, indicating formation of spherical micelles, but it remains to be 70.7 with further increase in NaBr concentration, suggesting that the micelle is compact.Light scattering from aqueous NaI solutions of DPI increases strongly with increasing NaI concentration, especially beyond 0.01 M. The micelle has aggregation number, 71.6, in water and increases to 90.7 in 0.007 NaI, and the micelles are spherical in this range. At higher NaI concentrations rodlike micelles are formed with increasing micelle concentration, and in 0.05 M NaI the aggregation number reaches 1360.For all these micelles the linear doubl linea logarithmic relationships hold between micelle molecular weight and ionic strength.

缩略语：十二烷基卤化吡啶X=C：Cl，X=B：Br，X=I：从DPC和DPB的水溶液中的光散射增加，增加盐浓度分别高达1.0 M NaCl和0.5 M NaBr，然后随着盐浓度的进一步增加而降低。DPC在水中的胶束聚集数低至18.6，表明形成多孔胶束，在0.05M NaCl中为43.5，在4.0M NaCl中增加到71.9，表明形成球形胶束。DPB在水中的胶束聚集数为46.0，在0.3M NaBr中增加到70.7，表明形成了球形胶束，但随着NaBr浓度的进一步增加，聚集数仍保持在70.7，表明胶束是致密的。胶束在水中的聚集数为71.6，在0.007NaI溶液中聚集数增加到90.7，在此范围内胶束呈球形。当NaI浓度较高时，随着胶束浓度的增加，形成棒状胶束，在0.05M NaI时，聚集数达到1360。