Structural aspects of the low-temperature deprotonation of benzoic acid on Cu(110) surfaces

Q Chen, CC Perry, BG Frederick, PW Murray, S Haq, Neville Vincent Richardson

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)

Abstract

Exposure of Cu(110) at 90 K to a sub-monolayer amount of benzoic acid gives rise to both benzoate and undissociated acid species. Low coverage STM shows the diffusion and re-arrangement of molecules on the edge of clusters, while higher coverage images show one-dimensional dimeric features, assigned to benzoic acid dimers, growing anisotropically in the [001] direction. At higher temperature, a different dimer chain along the (+/-4, 3) directions can be observed. From temperature-dependent FTIR, the deprotonation of the flat-lying species takes place between 120 and 170 K. Further annealing shows crystallization at 183 K, which results in the periodic alpha-phase contrast, for the multilayer surface, the desorption of multilayer starts at 200 K and results in all molecules being upright in the c(8 x 2) structure. (C) 2000 Published by Elsevier Science B,V. All rights reserved.

Original languageEnglish
Pages (from-to)63-75
Number of pages13
JournalSurface Science
Volume446
Publication statusPublished - 1 Feb 2000

Keywords

  • benzoic acid
  • Cu(110) surfaces
  • Fourier transform infrared spectroscopy
  • scanning tunneling microscopy
  • SCANNING-TUNNELING-MICROSCOPY
  • MOLECULAR-REORIENTATION
  • DIFFUSION
  • AG(111)
  • CHEMISORPTION
  • BENZOATE/CU(110)
  • ORIENTATION
  • ADSORBATES
  • PYRIDINE
  • DYNAMICS

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