Solution preparation of two-dimensional covalently linked networks by polymerization of 1,3,5-Tri(4-iodophenyl)benzene on Au(111)

Georg Eder, Emily F. Smith, Izabela Cebula, Wolfgang M. Heckl, Peter H. Beton, Markus Lackinger

Research output: Contribution to journalArticle

28 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)3014-3021
Number of pages8
JournalACS Nano
Volume7
Issue number4
DOIs
Publication statusPublished - 11 Mar 2013
Externally publishedYes

Keywords

  • benzene
  • crystallization
  • gold
  • macromolecular substances
  • materials testing
  • metal nanoparticles
  • molecular conformation
  • nanostructures
  • particle size
  • polymers
  • surface properties

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