Minar Norma K, Hou Kun, Westermeier Christian, Döblinger Markus, Schuster Jörg, Hanusch Fabian C, Nickel Bert, Ozin Geoffrey A, Bein Thomas
Department of Chemistry and Center for NanoScience (CeNS), University of Munich (LMU), Butenandtstrasse 5-13, 81377 Munich (Germany).
Department of Physics and Center for NanoScience (CeNS), University of Munich (LMU), Geschwister-Scholl-Platz 1, 80539 Munich (Germany).
Angew Chem Int Ed Engl. 2015 Jun 22;54(26):7577-81. doi: 10.1002/anie.201411344. Epub 2015 May 8.
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.
本文展示了一种高度有序的三维共价富勒烯框架，其结构基于八面体功能化的富勒烯构建单元，其中每个富勒烯通过六个官能团与相邻的富勒烯隔开，并且其介孔率通过与液晶嵌段共聚物的协同自组装来控制。通过将合成溶液直接旋涂在玻璃或硅基板上，然后进行热处理，以支撑膜的形式获得了这种新型富勒烯框架材料。气体吸附、核磁共振光谱、小角X射线散射（SAXS）和透射电子显微镜（TEM）表明，富勒烯构建单元与液晶嵌段共聚物共同组装，形成了具有正交Fmmm对称性、可及孔径为7.5 nm且表面积高的高度有序的共价富勒烯框架。我们还注意到，三维共价富勒烯框架的介电常数明显低于无孔前驱体材料。
