Adsorption and geometry of 1,4-dioxane on Cu(1 0 0)

Pei Teng Chang, Chia Yuan Chen, Jong Liang Lin

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5 Citations (Scopus)

Abstract

The 1,4-dioxane adsorption and geometry on Cu(1 0 0) as functions of coverage and temperature have been studied by temperature-programmed reaction/desorption and reflection-absorption infrared spectroscopy. 1,4-dioxane is adsorbed reversibly on the surface with monolayer desorption at 212 K and multilayer desorption at ∼ 165 K at 4 L exposure. Below ∼ 1.5 L exposure, i.e. 0.6 monolayer coverage, 1,4-dioxane molecules are adsorbed with the ring approximately parallel to the surface. C-H⋯Cu interaction is evidenced by the C-H vibrational mode softening of 2811 cm-1. Increasing 1,4-dioxane exposure leads to tilted geometry for some of the adsorbed molecules: ∼ 50% at a monolayer coverage at 110 K. However, the monolayer structure is not closely packed at 110 K, most of the tilted molecules change to flat-lying geometry as the surface temperature is increased to 165 K just prior to the onset of molecular desorption.

Original languageEnglish
Pages (from-to)L96-L102
JournalSurface Science
Volume524
Issue number1-3
DOIs
Publication statusPublished - 2003 Feb 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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