Inhibition of the [2+2] cycloaddition: Maleic anhydride on Si(100)-2x1

Citation
T. Bitzer et al., Inhibition of the [2+2] cycloaddition: Maleic anhydride on Si(100)-2x1, J PHYS CH B, 105(20), 2001, pp. 4535-4537
Citations number
9
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF PHYSICAL CHEMISTRY B
ISSN journal
15206106 → ACNP
Volume
105
Issue
20
Year of publication
2001
Pages
4535 - 4537
Database
ISI
SICI code
1520-6106(20010524)105:20<4535:IOT[CM>2.0.ZU;2-J
Abstract
The chemisorption of maleic anhydride on Si(100)-2x1 at room temperature ha s been studied with scanning tunneling microscopy (STM). We observe that, a t low coverages below 0.12 monolayer, the unsaturated organic compound adso rbs almost exclusively on inter-dimer sites and not through a direct [2+2] cycloaddition. The STM images provide evidence that the adsorption of a sec ond maleic anhydride molecule on an adjacent inter-dimer site results in th e cleavage of the silicon dimer bond located between the two molecules. The chemisorption of the organic molecules induces a local rearrangement of un saturated silicon dimers.