Controlling Metalation Reaction of Phthalocyanine with Cobalt at Single-Molecule Level on Au(111) Surface |
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Authors: | Liang Zhu Bin Li Lei Dong Wei Feng Ai-di Zhao Bing Wang |
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Institution: | Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics,University of Science and Technology of China,Hefei 230026,China |
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Abstract: | Metalation reaction of metal-free phthalocyanine molecule with Co atom adsorbed on Au(111) surface has been studied in situ at single atom/molecule scale by low-temperature scanning tunneling microscopy (STM) experiment combined with simulations based on density function theory calculations. Through manipulations using STM tip, we showed a controlled manner to have a single metal-free phthalocyanine molecule react with a Co atom to form Co phthalocyanine molecule. In this reaction process, an intermediate state originating from $\pi$-d interaction between the metal-free phthalocyanine molecule and Co atom has been identified. Moreover, we also revealed that the redox reaction represented as bond breaking and bond forming relative to the Co and pyrrolic N atoms, not pyrrolic H atoms, is a key process for dehydrogenation and metalation reaction. Our DFT calculations provided theoretical supporting for the above conclusions, and further understanding of the related mechanisms. |
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Keywords: | Phthalocyanine Metalation reaction Scanning tunneling microscopy |
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