Optical Excitation of Carbon Nanotubes Drives Localized Diazonium Reactions.
Optical Excitation of Carbon Nanotubes Drives Localized Diazonium Reactions.
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DOI：
10.1021/acs.jpclett.6b01771
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发表时间：
2016-09-15
期刊：
影响因子：
--
通讯作者：
Wang Y
中科院分区：
文献类型：
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作者：
Powell LR;Piao Y;Wang Y
共价化学已被广泛用于修饰碳纳米材料；然而，它们通常缺乏直接设计其光学和电子性能所需的精度和效率。在这里，我们第一次展示了与碳纳米管共振的可见光可以通过芳基重氮盐来驱动它们的官能化。光激发使反应速率提高了154倍(±13)，并显著提高了与sp2碳晶格的共价键合效率。对照实验表明，该反应是由局域光热效应主导的。这种光驱动的反应为精确的纳米化学铺平了道路，这种化学可以直接在光学和电子层面上定制碳纳米材料。
Covalent chemistries have been widely used to modify carbon nanomaterials; however, they typically lack the precision and efficiency required to directly engineer their optical and electronic properties. Here, we show, for the first time, that visible light which is tuned into resonance with carbon nanotubes can be used to drive their functionalization by aryldiazonium salts. The optical excitation accelerates the reaction rate 154-fold (±13) and makes it possible to significantly improve the efficiency of covalent bonding to the sp2 carbon lattice. Control experiments suggest that the reaction is dominated by a localized photothermal effect. This light-driven reaction paves the way for precise nanochemistry that can directly tailor carbon nanomaterials at the optical and electronic levels.