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Updated: Jan 15, 2026

Fabrication, Densification, and Replica Molding of 3D Carbon Nanotube Microstructures
Published on: July 2, 2012
Expanded segments of three-dimensional carbonaceous nets with chirality: synthesis and structures
Toshiya M Fukunaga1, Kiyofumi Takaba2, Satoshi Yoshida3
1Department of Chemistry, The University of Tokyo Hongo 7-3-1, Bunkyo-ku Tokyo 113-0033 Japan isobe@chem.s.u-tokyo.ac.jp.
Researchers synthesized a novel two-story carbon cage molecule, phenine dipolluxene, based on the (10,3)-a net. This structure unexpectedly formed an interpenetrated network with a complex helical arrangement.
Area of Science:
- Materials Science
- Organic Chemistry
- Nanotechnology
Background:
- The (10,3)-a net, a chiral carbon allotrope, has been rediscovered as a diamond twin (pollux).
- Phenine, with its trigonal planar structure, enabled the synthesis of the cage molecule phenine polluxene.
- Expanding polluxene structures presents significant synthetic challenges, similar to polymantanes.
Purpose of the Study:
- To construct a novel, expanded phenine-based cage molecule.
- To explore the self-assembly and structural properties of the new molecule.
- To investigate the potential for creating complex interpenetrated networks.
Main Methods:
- Utilized a three-component covalent assembly strategy for cage formation.
- Employed synthetic organic chemistry techniques to build the phenine dipolluxene structure.
- Characterized the resulting molecular architecture and network topology.
Main Results:
- Successfully synthesized a two-story phenine dipolluxene structure exhibiting a homohelical sextuple helix of the (10,3)-a net.
- Observed unexpected dimeric entanglements within the dipolluxene structure.
- Formed an interpenetrated (10,3)-a net featuring a homohelical duodecuple helix.
Conclusions:
- Demonstrated the feasibility of constructing complex, multi-story carbon cages using three-component assembly.
- Revealed the propensity of phenine dipolluxene to form intricate interpenetrated networks.
- Highlighted the potential of the (10,3)-a net framework for designing novel carbon materials with unique helical architectures.
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