单壁碳纳米管的侧墙功能化通过添加二碳基
Hui Hu1, Bin Zhao, Mark A Hamon
1Center for Nanoscale Science and Engineering, Departments of Chemistry and Chemical & Environmental Engineering, University of California, Riverside, CA 92521-0403, USA.
Journal of the American Chemical Society
|December 4, 2003
概括
我们用二碳素功能化了可溶性单壁碳纳米管 (SWNT),保持了溶解性并改变了光学光谱. 这种共价变化显著影响电子过渡,使其与离子化学有所区别.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 化学 化学 化学
背景情况:
- 可溶性单壁碳纳米管 (SWNTs) 对于先进的应用至关重要.
- 了解侧墙功能化是调整SWNT属性的关键.
- 二碳为SWNTs的共价修饰提供了一条路径.
研究的目的:
- 为了报告可溶性HiPco SWNTs的侧墙功能化,使用二碳.
- 调查二碳功能化对SWNT溶解度和光学特性的影响.
- 用远红外光谱学在SWNT上区分共价与离子化学.
主要方法:
- 可溶性SWNTs与二碳化合物的侧墙功能化.
- 通过调整前体量来改变功能化程度 (12-23%).
- 频谱分析 (光学和远红外) 以描述SWNT在功能化之前和之后的特征.
- 用热处理来评估功能化的稳定性和可逆性.
主要成果:
- 双碳功能化SWNTs [(s-SWNT) CCl(2) ] 在有机溶剂中保持溶解性.
- 功能化和SWNT侧墙,改变pi电子系统并大大改变光学光谱.
- 25%的PI网络的和消除了红外互带过渡.
- 远红外光谱学显示金属SWNT中的费米水平转换强度下降,区分了共价与离子 (兴奋剂) 化学.
- 300°C以上的热处理破坏了C-Cl键,但没有恢复原来的SWNT电子结构.
结论:
- 双碳酸功能化是一种有效的方法,可以修改SWNT侧墙,同时保持溶解度.
- 这种共价变化显著改变了SWNTs的电子和光学特性.
- 远红外光谱是一种强大的工具,可以区分共价功能化和SWNT的兴奋剂效应.
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