Moses Melanie J, Fettinger James C, Eichhorn Bryan W
Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20782, USA.
Science. 2003 May 2;300(5620):778-80. doi: 10.1126/science.1082342.
The [As@Ni12@As20]3- ion was prepared from As7(3-) and Ni(COD)2 in ethylenediamine solutions and isolated as the Bu4P+ salt (As, arsenic; Ni, nickel; COD, cyclooctadiene; Bu, butyl; P, phosphorus). The anion contains an icosahedral [Ni12(mu12-As)]3- fragment that resides at the center of an As20 dodecahedral (fullerene) cage to give an onion-skin-like [As@Ni12@As20]3- cluster with Ih point symmetry. The icosahedron and pentagonal dodecahedron are reciprocal platonic solids, and the 32 surface atoms form a dimpled geodesic sphere composed of 60 triangular faces. In the gas phase, the [As@Ni12@As20]3- ion sequentially loses all 21 As atoms to form a series of Ni12As(21-x) clusters where 0 </= x </= 21, inclusively.
[As@Ni12@As20]3-离子是由As7(3-)和Ni(COD)2在乙二胺溶液中制备而成，并以Bu4P+盐的形式分离出来（As，砷；Ni，镍；COD，环辛二烯；Bu，丁基；P，磷）。该阴离子包含一个二十面体[Ni12(μ12-As)]3-片段，它位于As20十二面体（富勒烯）笼的中心，形成一个具有Ih点对称性的类似洋葱皮的[As@Ni12@As20]3-簇。二十面体和正十二面体是互反的柏拉图立体，32个表面原子形成一个由60个三角形面组成的有凹痕的测地球体。在气相中，[As@Ni12@As20]3-离子依次失去所有21个As原子，形成一系列Ni12As(21-x)簇，其中0 ≤ x ≤ 21，包含两端值。
