Journal
NATURE CHEMISTRY
Volume 4, Issue 3, Pages 215-220Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NCHEM.1242
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Funding
- Deutsche Forschungsgemeinschaft (DFG) [SFB 658]
- European Projects ARTIST and AtMol
- Fondo Trieste
- MIUR
- CNR (NOMCIS
- EU (NFFA)
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A key challenge in the field of nanotechnology, in particular in the design of molecular machines, novel materials or molecular electronics, is the bottom-up construction of covalently bound molecular architectures in a well-defined arrangement. To date, only rather simple structures have been obtained because of the limitation of one-step connection processes. Indeed, for the formation of sophisticated structures, step-by-step connection of molecules is required. Here, we present a strategy for the covalent connection of molecules in a hierarchical manner by the selective and sequential activation of specific sites, thereby generating species with a programmed reactivity. This approach leads to improved network quality and enables the fabrication of heterogeneous architectures with high selectivity. Furthermore, substrate-directed growth and a preferred orientation of the molecular nanostructures are achieved on an anisotropic surface. The demonstrated control over reactivity and diffusion during covalent bond formation constitutes a promising route towards the creation of sophisticated multi-component molecular nanostructures.
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