J. Am. Chem. Soc.: Hierarchical Dehydrogenation Reactions on a Copper Surface

Date:2018-03-20Keywords:Copper, Hierarchical dehydrogenation reactionsrView:31


Hierarchical Dehydrogenation Reactions on a Copper Surface


Qing Li1,‡, Biao Yang1,‡, Jonas Björk2, Qigang Zhong1,3, Huanxin Ju4, Junjie Zhang1, Nan Cao1, Ziliang Shi5, Haiming Zhang1, Daniel Ebeling3, Andre Schirmeisen3, Junfa Zhu4, Lifeng Chi1,*


1Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials &devices Soochow University, Suzhou 215123, China

2Department of Physics, Chemistry and Biology, IFM, Linköping University, 58183 Linköping, Sweden

3Institute of Applied Physics (IAP), Justus Liebig University Giessen, Heinrich-Buff-Ring, 16, 35392 Giessen, Germany

4National Synchrotron Radiation Laboratory and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei, Anhui 230029, China

5The Center for Soft Condensed Matter Physics & Interdisciplinary Research, Department of Physics, Soochow University, Suzhou 215006, China


Hierarchical control of chemical reactions is being considered as one of the most ambitious and challenging topics in modern organic chemistry. In this study, we have realized the one-by-one scission of the X-H bonds (X=N and C) of aromatic amines in a controlled fashion on the Cu(111) surface. Each dehydrogenation reaction leads to certain metal-organic supramolecular structures, which were monitored in single-bond resolution via scanning tunneling microscopy and non-contact atomic force microscopy. Moreover, the reaction pathways were elucidated from X-ray photoelectron spectroscopy measurements and density functional theory calculations. Our insights pave the way for connecting molecules into complex structures in a more reliable and predictable manner, utilizing carefully tuned step-wise on-surface synthesis protocols.