Steric Effect in Electron-Molecule Interaction

Yigal Lilach, Micha Asscher*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

A steric effect has been identified and measured in the interaction of electrons with oriented molecules, for the first time. Photoelectron mediated reactivity has been determined, with a cross section of σ = (3.0 ± 0.4) × 10-19 cm2 (methyl down) for an adsorbed CD3Br on O/Ru(001). A three times smaller cross section was obtained for the bromine down configuration, controlled by oxygen precoverage. A qualitatively similar molecular orientation dependent effect was measured by direct bombardment with 10 eV electrons, however, at much larger cross sections. The significance of the steric effect reported here for electron-transfer processes in general is discussed.

Original languageEnglish
Pages (from-to)4358-4361
Number of pages4
JournalJournal of Physical Chemistry B
Volume108
Issue number14
DOIs
StatePublished - 8 Apr 2004

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