Bond character of thiophene on Ge(100): Effects of coverage and temperature

Cited 10 time in webofscience Cited 0 time in scopus
  • Hit : 295
  • Download : 2
We have studied the adsorption and decomposition of thiophene (C4H4S) on Ge(100) using scanning tunneling microscopy (STM), high-resolution core-level photoemission spectroscopy (HRPES), and density functional theory (DFT) calculation. Analysis of S 2p core-level spectra reveals three adsorption geometries, which we assign to a Ge-S dative bonding state, a [4 + 2] cycloaddition bonding state, and a decomposed bonding state (desulfurization reaction product). Furthermore, we found that the number ratio of the three adsorption geometries depended on the molecular coverage and the annealing temperature. At low coverages, the kinetically favorable dative bonding state is initially formed at room temperature. As the molecular coverage increases, thermodynamically stable [4 + 2] cycloaddition reaction products are additionally produced. In addition, we found that as the surface temperature increased, the [4 + 2] cycloaddition reaction product either possibly desorbed as molecular thiophene or decomposed to form a metallocycle-like species (C4H4Ge2) and a sulfide (Ge2S). We systematically elucidate the changes in the bonding states of adsorbed thiophene on Ge(100) according to the thiophene coverage and annealing temperature.
Publisher
AMER CHEMICAL SOC
Issue Date
2006-11
Language
English
Article Type
Article
Keywords

POTENTIAL-ENERGY SURFACE; PHOTOELECTRON-SPECTROSCOPY; ORGANIC MONOLAYERS; BENZENE DIMER; X-1 SURFACE; SI(100)-(2X1); DECOMPOSITION; ADSORPTION; SI(001)

Citation

JOURNAL OF PHYSICAL CHEMISTRY B, v.110, no.43, pp.21728 - 21734

ISSN
1520-6106
DOI
10.1021/jp064251r
URI
http://hdl.handle.net/10203/11355
Appears in Collection
CH-Journal Papers(저널논문)
Files in This Item
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 10 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0