NDLI: Ullmann-type coupling of brominated tetrathienoanthracene on copper and silver

Content Provider	Royal Society of Chemistry (RSC)
Author	Gallagher, Mark Rosei, Federico Vondráček, Martin Garah, Mohamed El Fu, Chaoying Perepichka, Dmitrii F. Lipton-Duffin, Josh Dinca, Laurentiu E. Cardenas, Luis Rybachuk, Maksym Gutzler, Rico Szakacs, Csaba E.
Copyright Year	2014
Abstract	We report the synthesis of extended two-dimensional organic networks on Cu(111), Ag(111), Cu(110), and Ag(110) from thiophene-based molecules. A combination of scanning tunnelling microscopy and X-ray photoemission spectroscopy yields insight into the reaction pathways from single molecules towards the formation of two-dimensional organometallic and polymeric structures via Ullmann reaction dehalogenation and C–C coupling. The thermal stability of the molecular networks is probed by annealing at elevated temperatures of up to 500 °C. On Cu(111) only organometallic structures are formed, while on Ag(111) both organometallic and covalent polymeric networks were found to coexist. The ratio between organometallic and covalent bonds could be controlled by means of the annealing temperature. The thiophene moieties start degrading at 200 °C on the copper surface, whereas on silver the degradation process becomes significant only at 400 °C. Our work reveals how the interplay of a specific surface type and temperature steers the formation of organometallic and polymeric networks and describes how these factors influence the structural integrity of two-dimensional organic networks.
Starting Page	2660
Ending Page	2668
Page Count	9
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	6
Issue Number	5
Journal	Nanoscale
DOI	10.1039/c3nr05710k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	X-ray crystallography Organometallic chemistry Ullmann reaction Covalent bond Interplay Entertainment Ullmann Photoemission spectroscopy Thiophene Copper Scanning tunneling microscope Nucleic acid thermodynamics
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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