溶液中的单个石墨烯纳米带的内在特性:合成和光谱研究
Yinjuan Huang1, Fugui Xu1, Lucia Ganzer2
1School of Chemistry and Chemical Engineering , Shanghai Jiao Tong University , 800 Dongchuan RD , Shanghai 200240 , China.
Journal of the American Chemical Society
|August 8, 2018
概括
具有庞大的侧组的结构定义的石墨烯纳米带 (GNR) 在有机溶剂中显示出出色的分散性. 这一突破使GNR激发状态动态的实时研究成为可能,揭示了类似分子的行为.
科学领域:
- 材料科学
- 纳米技术
- 有机化学
背景情况:
- 石墨烯纳米带 (GNR) 是有前途的材料,但它们的聚合限制了它们的应用.
- 在有机溶剂中实现高分散性对于研究GNR特性至关重要.
研究的目的:
- 合成和描述具有增强分散性的新型石墨烯纳米带 (GNR).
- 在溶液中研究这些GNR的兴奋状态动态.
主要方法:
- 用安特拉单元和N-n-hexadecyl maleimide的Diels-Alder循环载荷管进行功能化的GNR合成.
- 包括UV-Vis吸收,光光谱和时间分辨率光的光谱研究.
- 在各种有机溶剂,特别是四氨酸 (THF) 中分散的特征.
主要成果:
- 合成的GNR大小均 (宽度为1.7 nm,长度高达58 nm).
- 功能化GNR在THF中表现出极好的分散性,其度高达5毫克/升.
- 稀释的GNR分散显示近红外辐射具有高量子产量 (9.1%) 和长寿命 (8.7 ns),这是非聚合结构的特征.
结论:
- 新的GNR显示出前所未有的分散性,克服了聚合问题.
- 高分散性允许实时观察超快的兴奋状态动态,模仿小分子.
- 这一进步为探索GNR物理特性和应用开辟了新的途径.
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