| AVS 62nd International Symposium & Exhibition | |
| Surface Science | Tuesday Sessions |
| Session SS-TuP |
| Session: | Surface Science Poster Session |
| Presenter: | Michael Lepper, FAU Erlangen-Nürnberg |
| Authors: | M. Lepper, FAU Erlangen-Nürnberg M. Stark, FAU Erlangen-Nürnberg L. Zhang, FAU Erlangen-Nürnberg H.-P. Steinrück, FAU Erlangen-Nürnberg, Germany H. Marbach, FAU Erlangen-Nürnberg |
| Correspondent: | Click to Email |
A detailed scanning tunneling microscopy study of the self-assembly and thermally induced conformational changes of Ni(II)-meso-tetrakis (4-tert-butylphenyl) benzoporphyrin (Ni-TTBPBP) on Cu(111) will be presented. The coverage-dependent adsorption behavior at room temperature reveals that Ni-TTBPBP molecules can easily diffuse on the surface and self-assemble into islands with square order and a certain registry to the substrate.1 The role of molecule-molecule and molecule-substrate interactions for the formation of the well-ordered supramolecular structure will be discussed. Interestingly, upon moderate heating two successive, irreversible intramolecular conformational changes are observed. This is explained comprehensively by a thermally induced dehydrogenative, intramolecular aryl-aryl coupling reaction. In addition this intramolecular structural change is coverage dependent, exhibiting a lower rate at higher initial coverage. This modification and the overall adsorption behavior of Ni-TTBPBP on Cu(111) will be discussed and compared to the very different behavior of the similar Ni(II)-tetraphenylbenzoporphyrin on the same substrate.
1. L. Zhang, M. Lepper, M. Stark, D. Lungerich, N. Jux, W. Hieringer, H.-P. Steinrück and H. Marbach, Phys. Chem. Chem. Phys., 2015, DOI: 10.1039/C5CP01490E.