| AVS 62nd International Symposium & Exhibition | |
| Surface Science | Wednesday Sessions |
| Session SS+AS+NS-WeM |
| Session: | Metals, Alloys & Oxides: Reactivity and Catalysis |
| Presenter: | Liang Zhang, Universität Erlangen-Nürnberg, Germany |
| Authors: | L. Zhang, Universität Erlangen-Nürnberg, Germany M. Lepper, Universität Erlangen-Nürnberg, Germany M. Stark, Universität Erlangen-Nürnberg, Germany S. Ditze, Universität Erlangen-Nürnberg, Germany H.-P. Steinrück, Universität Erlangen-Nürnberg, Germany H. Marbach, Universität Erlangen-Nürnberg, Germany |
| Correspondent: | Click to Email |
Self-assembly of functional molecular building blocks on well-defined surfaces is a promising approach for the bottom-up fabrication of two-dimensional nanostructures with outstanding properties. In this respect, porphyrins are particularly attractive because of their distinct chemical and physical properties.1,2
In this presentation, we investigate and compare the adsorption behaviour of 2H-5,10,15,20-Tetrakis-(3,5-di-tert-butyl)-phenylporphyrin (2HTTBPP) on different substrates, i.e., Cu(111),3-5 Cu(110) and Cu(110)-(2X1)O, under ultra-high vacuum conditions by scanning tunneling microscopy (STM). At room temperature, supramolecular arrangements of 2HTTBPP are observed on Cu(111) and Cu(110)-(2X1)O, while on Cu(110) individual 2HTTBPP molecules are observed in a disorderd layer. Interestingly, the intramolecular conformations of the molecules are quite different on the investigated substrates, as determined by STM.4 The corresponding findings are interpreted by accounting for specific molecule-molecule and molecule-substrate interactions. In addition, the so-called self-metalation of 2HTTBPP with Cu atoms will be reported and discussed.4,5
References:
1. Auwärter, et al., Nat. Chem., 2015, 7, 105.
2. Gottfried, Surf. Sci. Rep., 2015, doi:10.1016/j.surfrep.2015.04.001.
3. Ditze et al., J. Am. Chem. Soc., 2014, 136, 1609.
4. Stark et al., Chem. Commun., 2014, 50, 10225.
5. Marbach et al., Chem. Commun., 2014, 50, 9034.