Self-assembled monolayers of a bis(pyrazol-1-yl)pyridine-substituted thiol on Au(III)

Cai Shen, Marco Haryono, Andreas Grohmann, Manfred Buck, Tobias Weidner, Nirmalya Ballav, Michael Zharnikov

Research output: Journal PublicationArticlepeer-review

38 Citations (Scopus)

Abstract

Self-assembled monolayers (SAMs) of a bis(pyrazol-1-yl)pyridine-substituted thiol (bpp-SH) on Au (111)/mica were studied with scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), and near-edge X-ray absorption fine structure spectroscopy (NEXAFS). Using substrates precoated with perylene-3,4,9,10-tetracarboxylic acid dianhydride (PTCDA), preparation at elevated temperatures yields highly ordered layers whose structure is described by a rectangular (5 × √3) unit cell containing one molecule. The bis(pyrazol-1-yl)pyridine (bpp) units exhibit π-stacking along the 〈112̄〉 direction, and they are tilted significantly. We conclude the three imine nitrogen atoms in the bpp headgroup adopt a trans,trans arrangement.

Original languageEnglish
Pages (from-to)12883-12891
Number of pages9
JournalLangmuir
Volume24
Issue number22
DOIs
Publication statusPublished - 18 Nov 2008
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science (all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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