Carbon-Free Fullerenes: Condensed and Stuffed Anionic Examples in Indium Systems
Carbon-Free Fullerenes: Condensed and Stuffed Anionic Examples in Indium Systems
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DOI：
10.1126/science.262.5135.880
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发表时间：
1993-11
期刊：
影响因子：
56.9
通讯作者：
S. C. Sevov;J. Corbett
中科院分区：
文献类型：
--
作者：
S. C. Sevov;J. Corbett
浓缩、有序的富勒烯类似物出现在六方相 Na96In97Z2（Z = 镍、钯或铂）中。 In74 (D3h) 和 M60 (= In48Na12, D3d) 的大笼共享五边形面，生成 NiAs 的双六边形密排类似物。所有这些多面体都以钠原子三角面体内部分无序的In10Z簇为中心，覆盖了笼子的所有内表面，即Z@In10@Na39@In74和Z@In10@Na32@Na12In48“洋葱”。这些化合物中的最高填充带显然涉及In74基层表面特征上的局域电子对。金刚石和Naln（填充金刚石结构）之间的结构和电子关系与某些富勒烯和Na96In97Z2以及可能的其他价驱动金属间相之间的结构和电子关系相似。
Condensed, well-ordered analogs of the fullerenes occur in the hexagonal phases Na96In97Z2 (Z = nickel, palladium, or platinum). Large cages of In74 (D3h) and M60 (= In48Na12, D3d) share pentagonal faces to generate a double—hexagonal close-packed analog of NiAs. All these polyhedra are centered by partially disordered In10Z clusters within deltahedra of sodium atoms that cap all inner faces of the cages, namely, Z@In10@Na39@In74 and Z@In10@Na32@Na12In48 "onions" The highest filled bands in these compounds apparently involve localized electron pairs on surface features on In74-based layers. Structural and electronic relations between diamond and Naln (stuffed diamond structure) parallel those between certain fullerenes and Na96In97Z2 and, presumably, other valence-driven intermetallic phases.