Inverse Bicontinuous Cubic Phases in 2:1 Fatty Acid/Phosphatidylcholine Mixtures. The Effects of Chain Length, Hydration, and Temperature
Inverse Bicontinuous Cubic Phases in 2:1 Fatty Acid/Phosphatidylcholine Mixtures. The Effects of Chain Length, Hydration, and Temperature
复制标题
2:1 脂肪酸/磷脂酰胆碱混合物中的反双连续立方相。
DOI：
10.1021/jp972835a
复制
发表时间：
1998
影响因子：
3.3
通讯作者：
J. Erbes
中科院分区：
文献类型：
--
作者：
R. Templer;J. Seddon;N. A. Warrender;A. Syrykh;Zhi‐Hong Huang;R. Winter;J. Erbes
用小角X射线衍射仪和偏光显微镜研究了饱和脂肪酸/磷脂酰胆碱2：1(摩尔：摩尔)饱和脂肪酸/磷脂酰胆碱同系物在水中的反双连续立方相的相和结构行为。对于C12脂肪酸/磷脂酰胆碱混合物，我们发现了三个反双连续立方相，我们的分析表明它们是基于P，D和G的最小表面。在35℃到49℃之间，随着含水率的增加，这些相的顺序为G→D→P。超额水P立方在49℃以上消失，取而代之的是与反六方相共存的D立方。对于C14脂肪酸/磷脂酰胆碱混合物，我们发现只有P立方与反六方相共存。对于链长较长的脂肪酸/磷脂酰胆碱混合物，完全没有反双连续立方，取而代之的是反六方相。我们的大部分证据都证明了……
Using small-angle X-ray diffraction and polarizing microscopy, we have investigated the phase and structural behavior of inverse bicontinuous cubic phases in a homologous series of 2:1 (mol:mol) saturated fatty acid/phosphatidylcholine mixtures in water. For the C12 fatty acid/phosphatidylcholine mixtures, we find three inverse bicontinuous cubic phases, which our analyses indicate are based upon the P, D, and G minimal surfaces. Between 35 and 49 °C these phases are observed to occur in the sequence G → D → P as the water content is increased. The excess water P cubic disappears above 49 °C when it is replaced by the D cubic in coexistence with the inverse hexagonal phase. For C14 fatty acid/phosphatidylcholine mixtures, we find only the P cubic in coexistence with the inverse hexagonal phase. For longer chain length fatty acid/phosphatidylcholine mixtures, the inverse bicontinuous cubics are entirely absent, their place being taken by the inverse hexagonal phase. Most of our evidence for the structure o...