Hydrogen-bonded clusters of ferrocenecarboxylic acid on Au(111)

Self-assembled monolayers of ferrocenecarboxylic acid (FcCOOH) contain two fundamental units, both stabilized by intermolecular hydrogen bonding: dimers and cyclic five-membered catemers. At surface coverages below a full monolayer, however, there is a significantly more varied structure that includ...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2014-09, Vol.5 (71), p.1229-1232
Main Authors: Quardokus, Rebecca C, Wasio, Natalie A, Christie, John A, Henderson, Kenneth W, Forrest, Ryan P, Lent, Craig S, Corcelli, Steven A, Alex Kandel, S
Format: Article
Language:English
Subjects:
Binomials
Clusters
Collapse
Dimers
Hydrogen bonding
Molecular structure
Monolayers
Statistical analysis
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Summary:Self-assembled monolayers of ferrocenecarboxylic acid (FcCOOH) contain two fundamental units, both stabilized by intermolecular hydrogen bonding: dimers and cyclic five-membered catemers. At surface coverages below a full monolayer, however, there is a significantly more varied structure that includes double-row clusters containing two to twelve FcCOOH molecules. Statistical analysis shows a distribution of cluster sizes that is sharply peaked compared to a binomial distribution. This rules out simple nucleation-and-growth mechanisms of cluster formation, and strongly suggests that clusters are formed in solution and collapse into rows when deposited on the Au(111) surface. A STM image of ferrocenecarboxylic acid clusters on Au(111), showing molecular clusters with both double-row and regular pentagonal geometries.
ISSN:1359-7345
1364-548X
DOI:10.1039/c4cc03664f