Stark MW, Träg J, Ditze S, Brenner W, Jux N, Steinrück HP, Marbach H (2015)
Publication Type: Journal article
Publication year: 2015
Publisher: American Institute of Physics (AIP)
Book Volume: 142
Pages Range: 101925
Volume: 142
Issue: 10
Journal Issue: 10
DOI: 10.1063/1.4908268
The adsorption of 2H-tetraphenylporphycene (2HTPPc) on Cu(111) was investigated by scanning tunneling microscopy (STM). At medium coverages, supramolecular ordered islands are observed. The individual 2HTPPc molecules appear as two pairs of intense protrusions which are separated by an elongated depression. In the islands, the molecules are organized in rows oriented along one of the close packed Cu(111) substrate rows; the structure is stabilized by T-type interactions of the phenyl substituents of neighboring molecules. Two types of rows are observed, namely, highly ordered rows in which all molecules exhibit the same orientation, and less ordered rows in which the molecules exhibit two perpendicular orientations. Altogether, three different azimuthal orientations of 2HTPPc are observed within one domain, all of them rotated by 15° $\pm$ 1° relative to one closed packed Cu direction. The highly ordered rows are always separated by either one or two less ordered rows, with the latter structure being the thermodynamically more stable one. The situation in the islands is highly dynamic, such that molecules in the less ordered rows occasionally change orientation, also complete highly ordered rows can move. The supramolecular order and structural dynamics are discussed on the basis of the specific molecule-substrate and molecule-molecule interactions.
APA:
Stark, M.W., Träg, J., Ditze, S., Brenner, W., Jux, N., Steinrück, H.-P., & Marbach, H. (2015). Supramolecular order and structural dynamics: A STM study of 2H-tetraphenylporphycene on Cu(111). Journal of Chemical Physics, 142(10), 101925. https://dx.doi.org/10.1063/1.4908268
MLA:
Stark, Michael Werner, et al. "Supramolecular order and structural dynamics: A STM study of 2H-tetraphenylporphycene on Cu(111)." Journal of Chemical Physics 142.10 (2015): 101925.
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