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过渡金属混合簇Nb2Rh2的密度泛函研究
Density Functional Theory Study of Mixed Transition-Metal Clusters Nb2Rh2
【摘要】 采用密度泛函方法(DFT)研究了过渡金属混合簇NbmRhn(m,n≤2)的结构、稳定性规律及它们的成键情况.结果表明,Nb—Nb键较强,Rh—Rh键较弱,而Nb—Rh键的强度则介于两者之间.在Nb2Rh2直线和折线构型中,金属键有强弱交替的现象.Nb2Rh2的各种构型在自旋多重度较小时稳定.
【Abstract】 The mixed transition-metal clusters NbmRhn (m, n≤2) have been calculated using density func-tional theory and the structures, stabilities and bond formation discussed. The results show that the bond Nb—Nb is stronger than that of Nb—Rh, and the weakest bond is Rh—Rh. The straight line and fold line structures of Nb2Rh2 have the weak-strong alternately bonds and all the structures are stable under low spin multiplicity.
【关键词】 密度泛函理论;
过渡金属团簇;
金属键;
【Key words】 density functional theory; transition-metal cluster; metal bond;
【Key words】 density functional theory; transition-metal cluster; metal bond;
【基金】 国家自然科学资金(Nos.90206038,20373053);福建省重大项目基金(No.2002F010)资助项目.
- 【文献出处】 化学学报 ,Acta Chimica Sinica , 编辑部邮箱 ,2005年21期
- 【分类号】O611.2;
- 【被引频次】1
- 【下载频次】121