| Title | Electron transfer phenomena at the molecular scale: organic charge transfer complexes on metal surfaces |
| Authors | I. Fernández Torrente, K.J. Franke, J. I. Pascual |
| Book | Atom and Molecule Manipulation, Elsevier, ed. by A.J. Mayne and G. Dujardin |
| Vol. 2, 2011, pg. 51 |
| Abstract | This chapter reports novel electronic properties exhibited by a charge transfer complex thin film, TTF-TCNQ, on a Au(111) surface. The individual adsorption of TTF and TCNQ leads to different charge states of the metal/organic interface, i.e., formation of a molecular Wigner lattice due to electrostatic repulsion in the first case, and molecular nucleation in neutral islands in the second. Donor-acceptor recognition governs the arrangement of mixed TTF-TCNQ domains, where the charge transfer process forms negatively charged molecular radicals (TCNQ−). These radicals have a spin ½ state, as evidenced by a Kondo resonance in STM spectroscopy analysis. Organic donor-acceptor interactions are thus a promising avenue towards the spontaneous self-assembled organization of metal-free molecular magnets. |
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