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Network Covalent Solids

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
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Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding

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Published on: September 23, 2018

A Geometrically Flexible Three-Dimensional Nanocarbon.

Chun Tang^1,2, Han Han^1,2, Ruihua Zhang^1,2

¹Department of Chemistry, The University of Hong Kong, Hong Kong SAR 999077, China.

Journal of the American Chemical Society

|July 9, 2024

Summary

This summary is machine-generated.

Researchers developed a flexible 3D nanocarbon, GFN-1, with unique electronic properties. This molecular nanocarbon demonstrates strong fullerene binding and rapid photoinduced electron transfer, enabling new functional coassemblies.

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Area of Science:

Organic Chemistry
Materials Science
Nanotechnology

Background:

Bottom-up organic synthesis is crucial for creating novel molecular nanocarbons.
Functional organic materials are needed for advancements in energy, electronics, and biomedicine.

Purpose of the Study:

To design and synthesize a geometrically flexible, three-dimensional (3D) nanocarbon (GFN-1).
To investigate the electronic properties and structural characteristics of GFN-1.
To explore the potential of GFN-1 in forming host-guest complexes with fullerenes.

Main Methods:

Bottom-up organic synthesis.
Electron paramagnetic resonance (EPR) and UV-vis-NIR spectroscopies.
Microcrystal electron diffraction and single-crystal X-ray diffraction.

Main Results:

Synthesis of GFN-1, a triptycene-based 3D nanocarbon with flexible peripheral π-panels.
Observation of through-space electronic communication in the GFN-1 monocationic radical, with delocalized spin density.
Structural analysis revealing propeller and tweezer conformations in the solid state and strong fullerene binding.
Formation of host-guest complexes with rapid photoinduced electron transfer (picosecond timescale).

Conclusions:

GFN-1 possesses a flexible 3D architecture and unique electronic properties.
GFN-1 forms stable complexes with fullerenes, facilitating rapid photoinduced electron transfer.
This research opens avenues for utilizing shape- and electronically complementary nanocarbons in functional coassemblies.