Dresden 2006 – wissenschaftliches Programm
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O: Oberflächenphysik
O 39: Nanostructures III
O 39.10: Vortrag
Donnerstag, 30. März 2006, 17:15–17:30, PHY C213
A Two-dimensional Porphyrin-based Porous Network Featuring Communicating Cavities — •Nikolai Wintjes1, Hannes Spillmann1, Andreas Kiebele1, Meike Stöhr1, Thomas Jung2, Davide Bonifazi3, Fuyong Cheng3, and François Diederich3 — 1Department of Physics, University of Basel, CH-4056 Basel — 2Paul Scherrer Institute, CH-5232 Villigen PSI — 3Laboratory for Organic Chemistry, ETH-Zürich, CH-8093 Zürich
The unique electrochemical and photophysical properties of porphyrin and [60]fullerene compounds make them promising candidates for the construction of two- and three-dimensional organic-based materials. Therefore, a detailed understanding of these molecular systems is crucial for a further and targeted development of new molecularly based materials. Metallo-porphyrins and their derivatives have been shown to be exceedingly useful building blocks for the construction of 3D supramolecular functional networks due to their excellent thermal and chemical stability and synthetic versatility. Nonetheless, no 2D analogon has been reported so far, although these could be interesting for various potential applications such as catalysts, molecular sieves, or chemical sensors. Herein we report on an unprecedented two-dimensional porphyrin network featuring dynamic pores capable of hosting fullerenes following a bottom-up approach at a single crystal silver surface. Surface- and porphyrin-driven long-range interactions between the C60 guest molecules and porphyrin layer resulted in the formation of exceptionally large supramolecular hybrid chains and islands as evidenced by Scanning Tunneling Microscopy (STM).