Vitovic P, Nikolelis D P, Hianik T
Department of Nuclear Physics and Biophysics, Faculty of Mathematics, Physics and Computer Sciences, Comenius University, 842 48 Bratislava, Slovakia.
Biochim Biophys Acta. 2006 Nov;1758(11):1852-61. doi: 10.1016/j.bbamem.2006.08.011. Epub 2006 Aug 25.
We have studied the physical properties of monolayers formed by calix[4]resorcinarene and in mixtures with dipalmitoyl phosphatidylcholine (DPPC) in various molar ratios formed at the air-water interface and at presence of dopamine in water subphase by means of measurements of surface pressure and dipole potential. We showed that both calix[4]resorcinarene as well as its mixture with DPPC form stable monolayers at the water subphase. The presence of dopamine resulted in an increase of the mean molecular area and in a decrease of the compressibility modulus of the monolayers. For mixed monolayers at higher content of calix[4]resorcinarene (> 0.2 molar fraction) a deviation from ideal miscibility took place especially for monolayers in a solid state. This can be connected with formation of aggregates of calix[4] resorcinarene. Lowest miscibility and weakest interaction of dopamine with a monolayer was observed for calix[4]resorcinarene molar fraction of 0.33 in the monolayer.
我们通过测量表面压力和偶极电势，研究了杯[4]间苯二酚芳烃形成的单分子层以及与二棕榈酰磷脂酰胆碱（DPPC）以各种摩尔比在气-水界面形成的混合物，且水相中存在多巴胺时的物理性质。我们发现，杯[4]间苯二酚芳烃及其与DPPC的混合物在水相中均形成稳定的单分子层。多巴胺的存在导致单分子层的平均分子面积增加，压缩模量降低。对于杯[4]间苯二酚芳烃含量较高（摩尔分数>0.2）的混合单分子层，尤其是固态单分子层，出现了偏离理想混溶性的情况。这可能与杯[4]间苯二酚芳烃聚集体的形成有关。在单分子层中杯[4]间苯二酚芳烃摩尔分数为0.33时，观察到多巴胺与单分子层的混溶性最低且相互作用最弱。
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