期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 140, 期 33, 页码 10416-10420出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.8b06028
关键词
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资金
- National Natural Science Foundation of China [21320102006, 21774076, 51573091, 91527304]
- Program of the Shanghai Committee of Science and Technology [17JC1403200]
- EC under Graphene Flagship [CNECT-ICT-604391, 785219 GrapheneCore 2]
- ERC under the European Union's Horizon 2020 research and innovation program [648417]
- EPSRC
- National Physical Laboratory of London
We report a novel type of structurally defined graphene nanoribbons (GNRs) with uniform width of 1.7 nm and average length up to 58 rim. These GNRs are decorated with pending Diels-Alder cycloadducts of anthracenyl units and N-n-hexadecyl maleimide. The resultant bulky side groups on GNRs afford excellent dispersibility with concentrations of up to 5 mg mL(-1) in many organic solvents such as tetrahydrofuran (THF), two orders of magnitude higher than the previously reported GNRs. Multiple spectroscopic studies confirm that dilute dispersions in THF (<0.1 mg mL(-1)) consist mainly of nonaggregated ribbons, exhibiting near infrared emission with high quantum yield (9.1%) and long lifetime (8.7 ns). This unprecedented dispersibility allows resolving in real-time ultrafast excited-state dynamics of the GNRs, which displays features of small isolated molecules in solution. This study achieves a breakthrough in the dispersion of GNRs, which opens the door for unveiling obstructed GNR-based physical properties and potential applications.
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