Temperature-Dependent Multidimensional Self-Assembly of Polyphenylene-Based 鈥淩od鈥揅oil鈥?Graft Polymers

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• 作者：Yinjuan Huang ; Yiyong Mai ; Xiangwen Yang ; Uliana Beser ; Junzhi Liu ; Fan Zhang ; Deyue Yan ; Klaus M眉llen ; Xinliang Feng
• 刊名：Journal of the American Chemical Society
• 出版年：2015
• 出版时间：September 16, 2015
• 年：2015
• 卷：137
• 期：36
• 页码：11602-11605
• 全文大小：341K
• ISSN：1520-5126

文摘

We present a novel type of 鈥渞od鈥揷oil鈥?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 掳C, which is higher than the crystallization temperature (T_c) of the PEO chains, the achiral graft copolymers self-organize into nanoribbons that twist into 鈭?0 渭m ultralong helices with controlled pitch depending on the grafting ratio of the PEO chains. At 10 掳C, which is lower than the T_c, quadrangular multilayer sheets of over 10 渭m 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.