温度依赖的基于聚苯撑的“棒-线”接枝聚合物的多维自组装。
Temperature-Dependent Multidimensional Self-Assembly of Polyphenylene-Based "Rod-Coil" Graft Polymers.
机构信息
School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University , 800 Dongchuan RD, Shanghai 200240, P. R. China.
Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany.
出版信息
J Am Chem Soc. 2015 Sep 16;137(36):11602-5. doi: 10.1021/jacs.5b07487. Epub 2015 Sep 4.
We present a novel type of "rod-coil" graft copolymer containing a polyphenylene backbone linked with poly(ethylene oxide) (PEO) side chains. Such graft copolymers manifest unprecedented temperature-dependent one-dimensional (1D) and two-dimensional (2D) self-assembly in solution. At 20 °C, which is higher than the crystallization temperature (Tc) of the PEO chains, the achiral graft copolymers self-organize into nanoribbons that twist into ∼30 μm ultralong helices with controlled pitch depending on the grafting ratio of the PEO chains. At 10 °C, which is lower than the Tc, quadrangular multilayer sheets of over 10 μm in lateral size are obtained. To our knowledge, this work presents the first example of controlled self-assembly of graft polymers into 1D helix and 2D sheet superstructures.
我们提出了一种新型的“棒-线”接枝共聚物，它含有一个连接着聚（氧化乙烯）（PEO）侧链的聚苯撑主链。这种接枝共聚物在溶液中表现出前所未有的温度依赖性一维（1D）和二维（2D）自组装。在 20°C 时，高于 PEO 链的结晶温度（Tc），非手性接枝共聚物自组织成纳米带，这些纳米带扭曲成具有可控螺距的 ∼30 μm 超长螺旋体，取决于 PEO 链的接枝率。在 10°C 时，低于 Tc，得到了超过 10 μm 横向尺寸的四边形多层片。据我们所知，这项工作首次展示了接枝聚合物可控自组装成 1D 螺旋和 2D 片超结构的例子。
Zotero 插件