期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 13, 页码 3366-3371出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201712637
关键词
graphene nanoribbons; helices; photothermal conversion; self-assembly; water-dispersible
资金
- Shanghai Committee of Science and Technology [17JC1403200, 16JC1400703]
- MPI Partner Group Project for Polymer Chemistry of GNRs
- Program for Shanghai Eastern Scholar, Shanghai Rising-Star Program [16QA1401400]
- National Natural Science Foundation of China [91527304, 21774076, 51573091, 21320102006, 21722801]
Structurally well-defined graphene nanoribbons (GNRs) have attracted great interest because of their unique optical, electronic, and magnetic properties. However, strong - interactions within GNRs result in poor liquid-phase dispersibility, which impedes further investigation of these materials in numerous research areas, including supramolecular self-assembly. Structurally defined GNRs were synthesized by a bottom-up strategy, involving grafting of hydrophilic poly(ethylene oxide) (PEO) chains of different lengths (GNR-PEO). PEO grafting of 42-51% percent produces GNR-PEO materials with excellent dispersibility in water with high GNR concentrations of up to 0.5mgmL(-1). The rod-coil brush-like architecture of GNR-PEO resulted in 1D hierarchical self-assembly behavior in the aqueous phase, leading to the formation of ultralong nanobelts, or spring-like helices, with tunable mean diameters and pitches. In aqueous dispersions the superstructures absorbed in the near-infrared range, which enabled highly efficient conversion of photon energy into thermal energy.
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