计算物理 ›› 2012, Vol. 29 ›› Issue (3): 453-458.

• 论文 • 上一篇    下一篇

PtIrn0,±(n=1~5)团簇结构与稳定性的理论研究

郭文录1, 饶倩2, 张秀荣3   

  1. 1. 江苏科技大学生物与化学工程学院, 镇江, 212003;
    2. 江苏科技大学材料科学与工程学院, 镇江, 212003;
    3. 江苏科技大学数理学院, 镇江, 212003
  • 收稿日期:2011-06-28 修回日期:2011-10-06 出版日期:2012-05-25 发布日期:2012-05-25
  • 作者简介:郭文录(1954-),男,教授,主要从事涂料和量化计算研究,E-mail:guowenlul954@163.com
  • 基金资助:
    江苏省普通高校研究生科研创新计划(批准号:CX09S_002Z)资助项目

Theoretical Study on Structure and Stability of PtIrn0,± (n=1~5) Clusters

GUO Wenlu1, RAO Qian2, ZHANG Xiurong3   

  1. 1. School of Biologic and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China;
    2. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China;
    3. School of Mathematics and Physics, Jiangsu University of Science and Technology, Zhenjiang 212003, China
  • Received:2011-06-28 Revised:2011-10-06 Online:2012-05-25 Published:2012-05-25

摘要: 采用密度泛函理论(DFT)中的b3lyp方法,在lanl2dz基组水平上对PtIrn0,±(n=1~5)团簇的各种可能构型进行几何参数全优化,得到它们的基态构型,并对其稳定性进行计算研究.结果表明:PtIrn0,±(n=1~5)团簇存在多种异构体,在原子数较少时均为二维平面结构,随着原子数的增加其基态结构变为三维结构;团簇的热力学稳定性随着原子个数的增加越来越好,PtIr3+团簇稳定性最好,与纯Ir团簇相比,PtIrn(n=1~5)团簇更易得到电子,非金属性增强;Ir原子对团簇的稳定性起到了主导作用.

关键词: PtIrn0, ±, (n=1~5)团簇, 结构与稳定性, 密度泛函理论

Abstract: Possible geometrical configurations of PtIrn0,± (n=1~5) clusters are optimized with density functional theory(b3lyp) at lanl2dz level.For ground state structures of PtIrn0,± (n=1~5) clusters,stability is calculated and analyzed.It shows that there are many isomerides in PtIrn0,± (n=1~5) clusters.Clusters with less atoms are two-dimensional graphic structures,while clusters with more atoms are three-dimensional graphic structures.With increase of atoms,thermodynamics stability of clusters is better.And stability of PtIr3+ cluster is the best.Compared with pure iridium clusters,it is easier for PtIrn(n=1~5) clusters to get an electron,Nonmetallicity of PtIrn(n=1~5) clusters is stronger.iridium atoms play a dominant action in stability of PtIrn0,± (n=1~5) clusters.

Key words: PtIrn0,± (n=1~5)clusters, structures and stability, density functional theory

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