Carbon-boron clathrates as a new class of sp
| Autor: | Li, Zhu, Gustav M, Borstad, Hanyu, Liu, Piotr A, Guńka, Michael, Guerette, Juli-Anna, Dolyniuk, Yue, Meng, Eran, Greenberg, Vitali B, Prakapenka, Brian L, Chaloux, Albert, Epshteyn, Ronald E, Cohen, Timothy A, Strobel |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Science Advances |
| ISSN: | 2375-2548 |
| Popis: | The realization of a novel guest/host carbon-boron sp3 framework opens the door for a new class of 3D carbon-based materials. Carbon-based frameworks composed of sp3 bonding represent a class of extremely lightweight strong materials, but only diamond and a handful of other compounds exist despite numerous predictions. Thus, there remains a large gap between the number of plausible structures predicted and those synthesized. We used a chemical design principle based on boron substitution to predict and synthesize a three-dimensional carbon-boron framework in a host/guest clathrate structure. The clathrate, with composition 2Sr@B6C6, exhibits the cubic bipartite sodalite structure (type VII clathrate) composed of sp3-bonded truncated octahedral C12B12 host cages that trap Sr2+ guest cations. The clathrate not only maintains the robust nature of diamond-like sp3 bonding but also offers potential for a broad range of compounds with tunable properties through substitution of guest atoms within the cages. |
| Databáze: | OpenAIRE |
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