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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
Supramolecular architectures on surfaces formed through hydrogen bonding optimized in three dimensions
Miao Yu1, Nataliya Kalashnyk, Wei Xu
1Interdisciplinary Nanoscience Center (iNANO) and Department of Physics and Astronomy Aarhus University, 8000 Aarhus, Denmark.
ACS Nano
|June 17, 2010
Summary
Researchers created novel 3-D molecular Landers that form extended hydrogen-bonded networks on surfaces. These structures, including 1-D chains and 2-D networks, offer new possibilities for nanostructure fabrication.
Area of Science:
- Supramolecular chemistry
- Surface science
- Nanotechnology
Background:
- Surface self-assembly often uses planar molecules in 2-D geometries.
- Molecular Landers are 3-D molecules with bulky groups acting as spacer legs.
- Hydrogen bonding is a key interaction driving self-assembly.
Purpose of the Study:
- To demonstrate extended, hydrogen-bonded surface architectures using molecular Landers.
- To investigate the formation of 1-D and 2-D supramolecular networks from molecular Landers.
- To explore the potential of these structures as molds for metallic nanostructures.
Main Methods:
- Utilized high-resolution scanning tunnelling microscopy (STM) under ultrahigh vacuum.
- Designed and synthesized a Lander molecule with dual diamino-triazine (DAT) functional moieties.
- Performed STM image calculations and molecular mechanics structural modeling.
Main Results:
- Successfully formed 1-D chains and five distinct long-range ordered 2-D supramolecular networks on a Au(111) surface.
- Observed characteristic intermolecular hydrogen bonding motifs enabled by 3-D configurations.
- Confirmed that these motifs are not possible in purely planar 2-D surface assembly.
Conclusions:
- Molecular Landers can form extended hydrogen-bonded surface architectures.
- The 3-D nature of Landers allows for unique hydrogen bonding configurations.
- These ordered Lander-DAT patterns show potential as molecular molds for metallic nanostructures.
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