STM investigation of molecular architectures of porphyrinoids on a Ag(111) surface: supramolecular ordering, electronic properties and reactivity

The self-assembly of large organic molecules has become a vividly explored and interdisciplinary field in science. One major goal is the tailored fabrication of highly ordered, molecular networks, which are stabilized on a metal surface. Metalloporphyrins receive particular attention, because their distinct intrinsic functionalities make them promising candidates for applications in chemical sensors, solar cells, and for tailored catalytic processes. Based on scanning tunneling microscopy investigations, several novel and fundamental contributions are presented, which has led to a new level of understanding. Highlights are the results with respect to intramolecular conformation and supramolecular ordering, electronic interactions with the substrate, surface confined synthesis such as in-situ metallation reactions, and ligand effects.The number of publications this work has led to emphasises its quality and significance. INDICE: Introduction.- Principle of the STM.- Origin of the Tunneling Current.- Scanning Tunneling Spectroscopy.- Contrast Mechanism of Molecular Adsorbates.- Temperature Programmed Desorption.- Low Energy Electron Diffraction.- UHV System.- Scanning Tunneling Microscope.- Control Electronics and Vibration Isolation.- Ag(111).- Porphyrinoids.- Preparation of thin Porphyrinoid Layers.- Vapor-deposition of Cobalt and Iron.- Self-Assembly and Individual Appearance of Tetraphenylporphyrins on.- Ag(111).- Self-Assembly and Individual Appearance of Cobalt(II)-Tetrakisditertbutylphenylporphyrins.- on Ag(111).- Coordination of Iron and Cobalt Atoms by Tetraphenylporphyrin Monolayers.- on Ag(111) and Formation of Metal(II)-Tetraphenylporphyrin.- Different Aspects of 2H-Tetrakisditertbutylphenylporphyrin on Ag(111).- Direct Metalation of a Phthalocyanine Monolayer on Ag(111) with coadsorbed.- Iron Atoms.- Multicomponent Adlayersof Tetraphenylporphyrins on Ag(111).- Modification of the Growth of Iron on Ag(111) by Predeposited Organic.- Monolayers.- Geometric and Electronic Aspectsof CoTPP upon Dosage of NO.- Self-Assembly and Voltage-dependent Appearance of Octaethylporphyrins.- Summary and Outlook.

• ISBN: 978-3-642-14839-2
• Editorial: Springer
• Encuadernacion: Cartoné
• Páginas: 170
• Fecha Publicación: 01/10/2010
• Nº Volúmenes: 1
• Idioma: Inglés