Combined photoemission and scanning tunneling microscopy study of the surface-assisted ullmann coupling reaction
Chen M, Xiao J, Steinrück HP, Wang S, Wang W, Lin N, Hieringer W, Gottfried JM (2014)
Publication Type: Journal article, Original article
Publication year: 2014
Journal
Original Authors: Chen M., Xiao J., Steinrück H.-P., Wang S., Wang W., Lin N., Hieringer W., Gottfried J.M.
Publisher: American Chemical Society
Book Volume: 118
Pages Range: 6820-6830
Journal Issue: 13
DOI: 10.1021/jp4121468
Abstract
The adsorption and reaction of 4,4-dibromo-para-terphenyl (DBTP) and 1,3,5-tris(4-bromophenyl)benzene (TBB) on Cu(111) surface were studied with X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), and density functional theory (DFT) calculations. In addition, complementary scanning tunneling microscopy (STM) data are presented. At submonolayer coverage, scission of C-Br bonds occurs between 170 and 240 K. The estimated activation energy for this process is considerably lower than the C-Br bond energy, indicating that bond scission is assisted by Cu atoms of the substrate. The remaining molecular backbones undergo linkage by C-Cu-C bonds to form organometallic oligomers. Annealing of these oligomers leads to the formation of C-C bonded covalent two-dimensional networks. Above monolayer coverage, complete C-Br cleavage requires higher temperature, confirming the role of the Cu surface in the reaction. The results provide insight into the C-Br bond scission as the initial step of the surface-assisted Ullmann reaction. © 2014 American Chemical Society.
Authors with CRIS profile
Hans-Peter Steinrück
Lehrstuhl für Physikalische Chemie II
Wolfgang Hieringer
Lehrstuhl für Theoretische Chemie
Additional Organisation(s)
Involved external institutions
Philipps-Universität Marburg
Germany (DE)
Hong Kong University of Science and Technology (HKUST) / 香港科技大學
China (CN)
Germany (DE)
Hong Kong University of Science and Technology (HKUST) / 香港科技大學
China (CN)
How to cite
APA:
Chen, M., Xiao, J., Steinrück, H.-P., Wang, S., Wang, W., Lin, N.,... Gottfried, J.M. (2014). Combined photoemission and scanning tunneling microscopy study of the surface-assisted ullmann coupling reaction. Journal of Physical Chemistry C, 118(13), 6820-6830. https://dx.doi.org/10.1021/jp4121468
MLA:
Chen, Min, et al. "Combined photoemission and scanning tunneling microscopy study of the surface-assisted ullmann coupling reaction." Journal of Physical Chemistry C 118.13 (2014): 6820-6830.
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