Queck, Fabian and Kreci, Ondrej and Scheuerer, Philipp and Bolland, Felix and Otyepka, Michal and Jelinek, Pavel and Repp, Jascha (2018) Bonding Motifs in Metal-Organic Compounds on Surfaces. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 140 (40). pp. 12884-12889. ISSN 0002-7863,
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The bonds in metal organic networks on surfaces govern the resulting geometry as well as the electronic properties. Here, we study the nature of these bonds by forming phenazine-copper complexes on a copper surface by means of atomic manipulation. The structures are characterized by a combination of scanning probe microscopy and density functional theory calculations. We observed an increase of the molecule-substrate distance upon covalent bond formation and an out-of-plane geometry that is in direct contradiction with the common expectation that these networks are steered by coordination bonds. Instead, we find that a complex energy balance of hybridization with the substrate, inhomogeneous Pauli repulsion, and elastic deformation drives the phenazine-copper interaction. Most remarkably, this attractive interaction is not driven by electron acceptor properties of copper but is of completely different donation/back-donation mechanism between molecular pi-like orbitals and sp-like metal states. Our findings show that the nature of bonds between constituents adsorbed on surfaces does not have to follow the common categories.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SCANNING TUNNELING MICROSCOPE; ATOMIC-FORCE MICROSCOPY; QUARTZ TUNING FORK; COORDINATION NETWORK; SUPRAMOLECULAR ARCHITECTURES; CU(111); RESOLUTION; CHEMISTRY; INTERMEDIATE; ORGANIZATION; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Giessibl > Group Jascha Repp |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 05 Dec 2019 13:10 |
| Last Modified: | 05 Dec 2019 13:10 |
| URI: | https://pred.uni-regensburg.de/id/eprint/13699 |
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