Accession Number:

ADA517948

Title:

Collective Reactivity of Molecular Chains Self-Assembled on a Surface

Descriptive Note:

Journal article

Corporate Author:

PITTSBURGH UNIV PA DEPT OF CHEMISTRY

Report Date:

2008-12-12

Pagination or Media Count:

5.0

Abstract:

Self-assembly of molecules on surfaces is a route toward not only creating structures, but also engineering chemical reactivity afforded by the intermolecular interactions. Dimethyldisulfide CH3SSCH3 molecules self-assemble into linear chains on single-crystal gold surfaces. Injecting low-energy electrons into individual molecules in the self-assembled structures with the tip of a scanning tunneling microscope led to a propagating chemical reaction along the molecular chain as sulfur--sulfur bonds were broken and then reformed to produce new CH3SSCH3 molecules. Theoretical and experimental evidence supports a mechanism involving electron attachment followed by dissociation of a CH3SSCH3 molecule and initiation of a chain reaction by one or both of the resulting CH3S intermediates.

Subject Categories:

  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE