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Title: Carbon-boron clathrates as a new class of sp3-bonded framework materials

Journal Article · · Science Advances
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1];  [3]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [1]
  1. Carnegie Inst. for Science, Washington, DC (United States)
  2. Carnegie Inst. for Science, Washington, DC (United States); Warsaw Univ. of Technology, Warszawa (Poland)
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Carnegie Inst. for Science, Argonne, IL (United States). High Pressure Collaborative Access Team (HPCAT) and Geophysical Lab.
  4. Univ. of Chicago, IL (United States). Center for Advanced Radiation Sources (CARS)
  5. Naval Research Lab. (NRL), Washington, DC (United States)
  6. Carnegie Inst. for Science, Washington, DC (United States); Ludwig Maximilian Univ., Munich (Germany); Univ. College London (United Kingdom)

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.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Energy Frontier Research Centers (EFRC) (United States). Energy Frontier Research in Extreme Environments (Efree)
Sponsoring Organization:
Defense Advanced Research Projects Agency (DARPA); European Research Council (ERC); National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division
Grant/Contract Number:
AC02-06CH11357; FG02-94ER14466; SC0001057
OSTI ID:
1599069
Journal Information:
Science Advances, Journal Name: Science Advances Journal Issue: 2 Vol. 6; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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