Weak intermolecular interactions in an ionically bound molecular adsorbate: cyclopentadienyl/Cu(111)

The dissociative adsorption of cyclopentadiene (C(5)H(6)) on Cu(111) yields a cyclopentadienyl (Cp) species with strongly anionic characteristics. The Cp potential energy surface and frictional coupling to the substrate are determined from measurements of dynamics of the molecule together with densi...

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Bibliographic Details
Published in:	Physical review letters Vol. 106; no. 18; p. 186101
Main Authors:	Hedgeland, H, Lechner, B A J, Tuddenham, F E, Jardine, A P, Allison, W, Ellis, J, Sacchi, M, Jenkins, S J, Hinch, B J
Format:	Journal Article
Language:	English
Published:	United States 06-05-2011
Online Access:	Get full text
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Summary:	The dissociative adsorption of cyclopentadiene (C(5)H(6)) on Cu(111) yields a cyclopentadienyl (Cp) species with strongly anionic characteristics. The Cp potential energy surface and frictional coupling to the substrate are determined from measurements of dynamics of the molecule together with density functional calculations. The molecule is shown to occupy degenerate threefold adsorption sites and molecular motion is characterized by a low diffusional energy barrier of 40±3 meV with strong frictional dissipation. Repulsive dipole-dipole interactions are not detected despite charge transfer from substrate to adsorbate.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.106.186101