Carbon-boron clathrates as a new class of sp3-bonded framework materials
L Zhu , Gustav M. Borstad , Hanyu Liu , Piotr Guńka , Michael Guerette , Juli-Anna Dolyniuk , Yue Meng , Eran Greenberg , Vitali B. Prakapenka , Brian L. Chaloux , Albert Epshteyn , Ronald E. Cohen , Timothy A. Strobel
AbstractCarbon-based frameworks composed of sp3bonding 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 C12B12host cages that trap Sr2+guest cations. The clathrate not only maintains the robust nature of diamond-like sp3bonding but also offers potential for a broad range of compounds with tunable properties through substitution of guest atoms within the cages.
|Journal series||Science advances, ISSN 2375-2548, e-ISSN 2375-2548|
|Score||= 200.0, 02-07-2020, ArticleFromJournal|
|Publication indicators||= 0; = 0; : 2018 = 12.804 (2) - 2018=13.293 (5)|
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