ELECTRONIC AND GEOMETRIC STRUCTURES OF ALUMINUM BORON NEGATIVE CLUSTER IONS (ALNBM-)

被引：69

作者：

NAKAJIMA, A

KISHI, T

SUGIOKA, T

KAYA, K

机构：

[1] Department of Chemistry, Faculty of Science and Technology, Keio University, Kohoku-ku, Yokohama, 223

来源：

CHEMICAL PHYSICS LETTERS | 1991年 / 187卷 / 03期

关键词：

D O I：

10.1016/0009-2614(91)90419-A

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Aluminum-boron negative cluster ions (AlnBm-, n = 5-30, m = 1-3) were generated by two independent laser-vaporization sources. The mass distribution of AlnB1- exhibits one peak at n=12 and one step between n = 22 and 23 as magic numbers. whereas that of AlnB2- exhibits only one step between n = 21 and 22. The loss of the magic number of Al11B2- can be explained by the geometric structures: Al12B1- is stabilized by both an electronic shell closing of the 2p shell and a close-packing structure of icosahedron. In contrast, Al11B2- can satisfy the electronic shell closing but cannot take the stable geometric structure because the diameters of Al and B atoms differ largely. The structure of Al12B1- can be an icosahedron with a B atom located at the center.

引用

页码：239 / 244

页数：6

共 23 条

[1] ELECTRONIC SHELL STRUCTURE IN SIMPLE METAL-CLUSTERS [J].