Unprecedented Transformation of Tetrathienoanthracene into Pentacene on Ni(111)
Unprecedented Transformation of Tetrathienoanthracene into Pentacene on Ni(111)
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DOI：
10.1021/nn305572s
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发表时间：
2013-02-01
期刊：
影响因子：
17.1
通讯作者：
Rosei, Federico
中科院分区：
文献类型：
--
作者：
Dinca, Laurentiu E.;Fu, Chaoying;Rosei, Federico
单分子反应事件的成像和表征对于扩展我们对化学的基本理解以及将这种理解应用于技术前沿的挑战（例如纳米电子学）至关重要。具体来说，理解单个分子的行为可以阐明在多种纳米技术中应用的受控合成材料的关键过程。在这里，我们报告了在超高真空（UHV）条件下，通过扫描隧道显微镜（STM）观察到的前所未有的反应合成了一种重要的半导体有机分子。我们的图像显示，在Ni（111）表面上，硫的提取和环化反应将四硫蒽前体转化为并五苯。用飞行时间二次离子质谱法（TOF-SIMS）确定了最终反应产物的性质。这种反应没有已知的文献模拟，并突出了局部探针技术在探索新的化学途径方面的力量。
The imaging and characterization of single-molecule reaction events is essential to both extending our basic understanding of chemistry and applying this understanding to challenges at the frontiers of technology, for example, in nanoelectronics. Specifically, understanding the behavior of individual molecules can elucidate processes critical to the controlled synthesis of materials for applications in multiple nanoscale technologies. Here, we report the synthesis of an important semiconducting organic molecule through an unprecedented reaction observed with resolution by scanning tunneling microscopy (STM) under ultrahigh vacuum (UHV) conditions. Our images reveal a sulfur abstraction and cyclization reaction that converts tetrathienoanthracene precursors into pentacene on the Ni(111) surface. The identity of the final reaction product was confirmed by time-of-flight secondary ion mass spectrometry (TOF-SIMS). This reaction has no known literature analogue, and highlights the power of local-probe techniques for exploring new chemical pathways.