Title |
Terminal Alkyne Coupling on a Corrugated Noble Metal Surface: From Controlled Precursor Alignment to Selective Reactions
|
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Published in |
Chemistry - A European Journal, October 2017
|
DOI | 10.1002/chem.201701735 |
Pubmed ID | |
Authors |
Tao Lin, Liding Zhang, Jonas Björk, Zhi Chen, Mario Ruben, Johannes V. Barth, Florian Klappenberger |
Abstract |
Surface-templated covalent coupling of organic precursors currently emerges as a promising route to the atom-precise fabrication of low-dimensional carbon materials. Here, we investigate the adsorption and the coupling reactions of 4,4''-diethynyl-1,1':4',1''- terphenyl on Au(110) under ultra-high vacuum conditions by using scanning tunneling microscopy combined with density functional theory and kinetic Monte Carlo calculations. Temperature treatment induces both 1,2,4 asymmetric cyclotrimerization and homo-coupling, resulting in various reaction products including a previously- unreported, surface-templated H-shaped pentamer. Our analysis of the temperature-dependent relative product abundances unravels that 1,2,4-trimerization and homo-coupling proceed via identical intermediate species with the final products depending on the competition of coupling to a third monomer vs. dehydrogenation. Our study sheds light on controlling coupling reactions via corrugated surfaces and annealing protocols. |
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Geographical breakdown
Country | Count | As % |
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Unknown | 15 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
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Student > Master | 3 | 20% |
Lecturer | 2 | 13% |
Student > Ph. D. Student | 2 | 13% |
Student > Doctoral Student | 1 | 7% |
Student > Bachelor | 1 | 7% |
Other | 3 | 20% |
Unknown | 3 | 20% |
Readers by discipline | Count | As % |
---|---|---|
Physics and Astronomy | 6 | 40% |
Chemistry | 5 | 33% |
Materials Science | 1 | 7% |
Unknown | 3 | 20% |