Paper SS2-ThA9
Reactive Adsorption to Ordered Bis-Terpyridine Networks
Thursday, November 12, 2009, 4:40 pm, Room N
| Session: |
Supramolecular Interfaces by Design |
| Presenter: |
T. Waldmann, Institute of Surface Chemistry and Catalysis, Germany |
| Authors: |
T. Waldmann, Institute of Surface Chemistry and Catalysis, Germany
H.E. Hoster, Institute of Surface Chemistry and Catalysis, Germany
D. Künzel, Institute of Theoretical Chemistry, Germany
M. Roos, Institute of Surface Chemistry and Catalysis, Germany
A. Breitruck, Institute of Surface Chemistry and Catalysis, Germany
A. Groß, Institute of Theoretical Chemistry, Germany
R.J. Behm, Institute of Surface Chemistry and Catalysis, Germany
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| Correspondent: |
Click to Email |
Using time resolved scanning tunneling microscopy, we tested the effect of O2 exposure on ordered supra-molecular networks of Bis-terpyridine derivative molecules (2,4’-BTP)[1,2] supported on Au(111)[3], Ag(111) [3,4] and Graphite[3] (HOPG) substrates at T = 300 K. Under certain circumstances, our image sequences unambiguously show modifications of individual 2,4’-BTP molecules upon O2 exposure and concomitant re-arrangements within the hydrogen bonded adlayer. Furthermore, comparison of the behaviour on different substrates clearly shows that these modifications require a catalytically active surface.
The experimental observations are complemented by density functional theory calculations. In combination, both give rise to a probable model for the observed surface reactions and their effect on the supramolecular structure.
[1] U.Ziener et al., Chem.Eur.J. 8, 951, 2002
[2] C. Meier et al., J.Phys.Chem.B 109, 21015, 2005
[3] H.E. Hoster et al., Langmuir 23, 11570, 2007
[4] M.Roos et al., Phys. Chem. Chem. Phys. 9, 5672, 2007