Chemical Identification and Bond Control of π-Skeletons in a Coupling Reaction
Chemical Identification and Bond Control of π-Skeletons in a Coupling Reaction
复制标题
偶联反应中 π 骨架的化学识别和键控制
DOI：
10.1021/jacs.1c02624
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发表时间：
2021
影响因子：
15
通讯作者：
Kim Yousoo
中科院分区：
文献类型：
--
作者：
Zhang Chi;Jaculbia Rafael B.;Tanaka Yusuke;Kazuma Emiko;Imada Hiroshi;Hayazawa Norihiko;Muranaka Atsuya;Uchiyama Masanobu;Kim Yousoo
高度不饱和的富π碳骨架提供了对低维碳纳米结构的结构和光电性质的多功能调节。然而，需要允许在合成期间更精确的化学鉴定和目标sp-/sp2-碳骨架的可控整合的方法。在这里，使用末端炔的耦合作为模型系统，我们展示了一种方法来可视化和识别在表面上的单个化学键水平上生成的π-骨架，从而实现进一步精确的键控制。的特征电子功能连同本地化的振动模式的碳骨架解决在真实的空间的扫描隧道显微镜/光谱（STM/STS）和尖端增强拉曼光谱（TERS）的组合。我们的方法允许不饱和碳骨架的单化学键理解，这对于生成具有原子精度的低维碳纳米结构和纳米材料至关重要。
Highly unsaturated π-rich carbon skeletons afford versatile tuning of structural and optoelectronic properties of low-dimensional carbon nanostructures. However, methods allowing more precise chemical identification and controllable integration of target sp-/sp2-carbon skeletons during synthesis are required. Here, using the coupling of terminal alkynes as a model system, we demonstrate a methodology to visualize and identify the generated π-skeletons at the single-chemical-bond level on the surface, thus enabling further precise bond control. The characteristic electronic features together with localized vibrational modes of the carbon skeletons are resolved in real space by a combination of scanning tunneling microscopy/spectroscopy (STM/STS) and tip-enhanced Raman spectroscopy (TERS). Our approach allows single-chemical-bond understanding of unsaturated carbon skeletons, which is crucial for generating low-dimensional carbon nanostructures and nanomaterials with atomic precision.