title: Solution preparation of two-dimensional covalently linked networks by polymerization of 1,3,5-Tri(4-iodophenyl)benzene on Au(111).
abstract: The polymerization of 1,3,5-tri(4-iodophenyl)benzene (TIPB) on Au(111) through covalent aryl-aryl coupling is accomplished using a solution-based approach and investigated by scanning tunneling microscopy. Drop-casting of the TIPB monomer onto Au(111) at room temperature results in poorly ordered noncovalent arrangements of molecules and partial dehalogenation. However, drop-casting on a preheated Au(111) substrate yields various topologically distinct covalent aggregates and networks. Interestingly, some of these covalent nanostructures do not adsorb directly on the Au(111) surface, but are loosely bound to a disordered layer of a mixture of chemisorbed iodine and molecules, a conclusion that is drawn from STM data and supported by X-ray photoelectron spectroscopy. We argue that the gold surface becomes covered by a strongly chemisorbed iodine monolayer which eventually inhibits further polymerization.
authors.affiliation: TUM School of Education and Center for NanoScience (CeNS), Tech Univ Munich, Schellingstrasse 33, 80799 Munich, Germany.
authors.forename: Georg
authors.initials: G
authors.lastname: Eder
authors.forename: Emily F
authors.initials: EF
authors.lastname: Smith
authors.forename: Izabela
authors.initials: I
authors.lastname: Cebula
authors.forename: Wolfgang M
authors.initials: WM
authors.lastname: Heckl
authors.forename: Peter H
authors.initials: PH
authors.lastname: Beton
authors.forename: Markus
authors.initials: M
authors.lastname: Lackinger
mesh_terms: D001554:Benzene / Q000737:chemistry*; D003460:Crystallization / Q000379:methods; D006046:Gold / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances; D011108:Polymers; D006046:Gold; D001554:Benzene