Laboratory of Functional ChemoSystems, UMR 7199, Faculté de Pharmacie, Université de Strasbourg, 74 route du Rhin, 67401 Illkirch, France.
Langmuir. 2011 Oct 4;27(19):12149-55. doi: 10.1021/la202162q. Epub 2011 Sep 8.
We synthesized new amphiphiles comprised of a single diacetylenic chain and an oligoethylenoxide polar chain linked by an amide bond. In aqueous medium, they are not soluble at room temperature but form weak gels. Electron microscopy studies have shown that they self-assemble into helical tapes or nanotubes with lengths of several micrometers, and inner and outer diameters of 50 ± 1 and 59 ± 1 nm, respectively. The wall has a thickness of 10 ± 1 nm for both kinds of objects and has an amphiphile bilayer structure. The hydrophobic chains are ordered, and the amide groups are linked with each other by H-bonds. The dissociation of the tubes is a first-order transition with an enthalpy of ca. 40 kJ mol(-1). The nanotubes were photopolymerized to yield purple solutions consisting of helical tapes and almost flat ribbons. The polymers exhibit irreversible thermochromism upon heating.
我们合成了由单炔键和聚乙二醇极性链通过酰胺键连接而成的新型两亲分子。在水介质中，它们在室温下不溶解，但形成弱凝胶。电子显微镜研究表明，它们自组装成螺旋带或纳米管，长度为数微米，内径和外径分别为 50 ± 1 和 59 ± 1nm。这两种物体的壁厚度均为 10 ± 1nm，具有两亲双层结构。疏水链有序排列，酰胺基团通过氢键相互连接。管的解离是一级相变，焓约为 40kJ/mol(-1)。纳米管被光聚合生成由螺旋带和几乎扁平的带状物组成的紫色溶液。聚合物在加热时表现出不可逆的热致变色。
