On-Surface Reaction between Tetracarbonitrile-Functionalized Molecules and Copper Atoms

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• 作者：Elena Nardi ; Long Chen ; Sylvain Clair ; Mathieu Koudia ; Luca Giovanelli ; Xinliang Feng ; Klaus M眉llen ; Mathieu Abel
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：November 26, 2014
• 年：2014
• 卷：118
• 期：47
• 页码：27549-27553
• 全文大小：377K
• ISSN：1932-7455

文摘

Self-assembly at surfaces has proven to be very efficient in creating ordered, atomically controlled organic nanostructures. On-surface synthesis has recently emerged as a promising strategy to create stable structures bound by strong and irreversible covalent bonds. Here we present on-surface reaction between pyrazino phenanthroquinoxaline-tetracarbonitrile (PPCN) molecules and copper atoms on a Au(111) substrate. The reaction is monitored in ultrahigh vacuum conditions by scanning tunneling microscopy and X-ray photoelectron spectroscopy (XPS). After a 475 K annealing, phthalocyanine cyclization occurs around a copper atom; the increase of annealing temperature to 540 and 675 K leads to the formation of 1D and 2D phthalocyanine polymers, respectively. This reaction is confirmed by the modification of the Cu 2p_3/2 and C 1s XPS spectra upon annealing.