1. A Highly-Ordered 3D Covalent Fullerene Framework
- Author
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Geoffrey A. Ozin, Norma K. Minar, Kun Hou, Christian Westermeier, Markus Döblinger, Jörg Schuster, Thomas Bein, Fabian C. Hanusch, and Bert Nickel
- Subjects
Fullerene ,Silicon ,chemistry.chemical_element ,02 engineering and technology ,mesoporous materials ,010402 general chemistry ,01 natural sciences ,Catalysis ,Condensed Matter::Materials Science ,Physics::Atomic and Molecular Clusters ,Copolymer ,Organic chemistry ,Spin coating ,Chemistry ,Small-angle X-ray scattering ,fullerenes ,General Medicine ,self-assembly ,General Chemistry ,021001 nanoscience & nanotechnology ,Communications ,covalent frameworks ,0104 chemical sciences ,Condensed Matter::Soft Condensed Matter ,Crystallography ,Covalent bond ,Orthorhombic crystal system ,Self-assembly ,0210 nano-technology ,electron mobility - Abstract
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.
- Published
- 2015
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