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首页> 外文期刊>Chemistry and Physics of Lipids >Concentration and pH-dependent aggregation behavior of an l-histidine based amphiphile in aqueous solution
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Concentration and pH-dependent aggregation behavior of an l-histidine based amphiphile in aqueous solution

机译：基于组氨酸的两亲物在水溶液中的浓度和pH依赖性聚集行为

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摘要

The surface activity and self-assembly behavior of zwitterionic amphiphile N-(2-hydroxydodecyl)-lhistidine (C_(12)HHis) were studied in phosphate buffers of pH 2 and 13 using surface tension and fluorescence probe techniques, respectively. Transmission electron microscopic images of the aggregates have revealed existence of nano-size vesicles in dilute solutions of both acidic and basic pH. In basic medium, the vesicles are converted to tubular aggregates upon increase of surfactant concentration. The nanotubes undergo phase transition to form elongated or small rod-like micelles at a much higher concentration of the amphiphile. The vesicles and nanotubes were found to become more stable upon addition of 10 mol% of cholesterol.
机译：使用表面张力和荧光探针技术分别研究了两性离子两亲性N-（2-羟基十二烷基）-组氨酸（C_（12）HHis）的表面活性和自组装行为。聚集体的透射电子显微镜图像显示在酸性和碱性pH的稀溶液中存在纳米大小的囊泡。在碱性介质中，当表面活性剂浓度增加时，囊泡会转变为管状聚集体。纳米管经历相变以在两亲物的浓度高得多的情况下形成细长的或小的棒状胶束。发现当添加10mol％的胆固醇时，囊泡和纳米管变得更稳定。

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