期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 137, 期 36, 页码 11602-11605出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.5b07487
关键词
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资金
- 973 Programs of China [2012CB933404, 2013CBA01602]
- Natural Science Foundation of China [21320102006, 21304057]
- Natural Science Foundation of Shanghai [13ZR1421200]
- Program for Eastern Scholar in Shanghai
- MPI Partner Group Project for Polymer Chemistry of Graphene Nanoribbons
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 degrees 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 similar to 30 mu m ultralong helices with controlled pitch depending on the grafting ratio of the PEO chains. At 10 degrees C, which is lower than the T-c, quadrangular multilayer sheets of over 10 mu 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.
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