Wang Pei, Ma Zhun, Yang Yan-Lian, Fan Qu-Li, Yu Xin-Fei, Wang Chen, Huang Wei, Wang Lian-Hui
Laboratory of Advanced Materials, Fudan University, Shanghai, 200433, PR China.
Phys Chem Chem Phys. 2009 Jan 7;11(1):167-71. doi: 10.1039/b810630d. Epub 2008 Oct 31.
A novel alternant amphiphilic polymer poly[1,4-bis(phenylethynyl)-2,5-bis(hexyloxy)benzene-alt-tetra(ethylene oxide)] was prepared. Atom force microscope (AFM) images showed that the molecular self-assembly morphologies changed from molecular nanowires to twist fibrillar architectures with the increase of the solution concentrations. Short and thin wires formed in dilute solution, while large bundles developed in relatively concentrated ones, shown by fluorescence microscope images. The photoluminescence (PL) spectra of the corresponding films indicate a self-assembly process of the polymers under slow solvents evaporation. Coplanar aggregation was confirmed through PL and photoluminescence excitation (PLE) spectra. Furthermore, the self-assembly process in polymer bulk was studied by wide-angle X-ray diffraction. To the best of our knowledge, it is the first time to reveal the change of the molecular morphologies with the altering concentration for the alternant amphiphilic conjugated polymers.
制备了一种新型交替型两亲聚合物聚[1,4-双（苯乙炔基）-2,5-双（己氧基）苯-alt-四（环氧乙烷）]。原子力显微镜（AFM）图像显示，随着溶液浓度的增加，分子自组装形态从分子纳米线转变为扭曲的纤维状结构。荧光显微镜图像显示，稀溶液中形成短而细的线，而相对浓溶液中形成大的束。相应薄膜的光致发光（PL）光谱表明聚合物在缓慢溶剂蒸发下的自组装过程。通过PL和光致发光激发（PLE）光谱证实了共面聚集。此外，通过广角X射线衍射研究了聚合物本体中的自组装过程。据我们所知，这是首次揭示交替型两亲共轭聚合物分子形态随浓度变化的情况。
