A Highly-Ordered 3D Covalent Fullerene Framework

A highly‐ordered 3D covalent fullerene framework is presented with a structure based on octahedrally functionalized fullerene building blocks in which every fullerene is separated from the next by six functional groups and whose mesoporosity is controlled by cooperative self‐assembly with a liquid‐c...

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Bibliographic Details
Published in:Angewandte Chemie 2015-06, Vol.127 (26), p.7687-7691
Main Authors: Minar, Norma K., Hou, Kun, Westermeier, Christian, Döblinger, Markus, Schuster, Jörg, Hanusch, Fabian C., Nickel, Bert, Ozin, Geoffrey A., Bein, Thomas
Format: Article
Language:eng ; ger
Subjects:
Block copolymers
Chemistry
Copolymers
Covalence
Elektronenbeweglichkeit
Fullerene
Fullerenes
Glass
Heat treatment
Kovalente Gerüste
Mesoporöse Materialien
Selbstorganisation
Self assembly
Spin coating
Three dimensional
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Summary:A highly‐ordered 3D covalent fullerene framework is presented with a structure based on octahedrally functionalized fullerene building blocks in which every fullerene is separated from the next by six functional groups and whose mesoporosity is controlled by cooperative self‐assembly with a liquid‐crystalline block copolymer. The new fullerene‐framework material was obtained in the form of supported films by spin coating the synthesis solution directly on glass or silicon substrates, followed by a heat treatment. The fullerene building blocks coassemble with a liquid‐crystalline block copolymer to produce a highly ordered covalent fullerene framework with orthorhombic Fmmm symmetry, accessible 7.5 nm pores, and high surface area, as revealed by gas adsorption, NMR spectroscopy, small‐angle X‐ray scattering (SAXS), and TEM. We also note that the 3D covalent fullerene framework exhibits a dielectric constant significantly lower than that of the nonporous precursor material. C60‐Selbstorganisation: Ein hoch geordnetes 3D‐Netzwerk wurde hergestellt, dessen Struktur auf oktaedrisch funktionalisierten Fulleren‐Bausteinen beruht. Die C60‐Baueinheiten bilden gemeinsam mit einem flüssigkristallinen Blockcopolymer ein kovalentes Gerüst mit orthorhombischer Fmmm‐Symmetrie und 7.5 nm großen Poren.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201411344