摘要
在相对论有效原子实势(RECP)近似下,用密度泛函中的B3LYP/LANL2DZ方法,对纯Pbn(n=2—5)团簇、PdnPbm(n+m≤5)混合团簇的各种可能几何构型进行全优化计算,得到它们的基态结构和光谱性质;从结构和振动光谱两个方面分析了其形成规律;最后计算了团簇的能级分布和最高占据轨道(HOMO)与最低空轨道(LUMO)之间的能级间隙(HLG),分析了团簇的化学活性.
The possible geometrical and electronic structures of small bimetallic Pd-Pb clusters including Pbn ( n = 2,3,4,5) and Pdn Pbm (n + m ≤5) have been optimized by density functional theory(B3LYP/LANL2DZ) method with relativistic effective core potential(RECP) using Gaussian 98 code. The shaping regularities of small bimetallic Pd-Pb clusters is analyzed based on structures and vibration spectrum. Finally, the energy level distribution, HOMO-LUMO gaps and the chemical activation are discussed.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第5期2241-2248,共8页
Acta Physica Sinica
基金
国家自然科学基金(批准号:10176021
10276028)资助的课题~~
关键词
团簇
有效原子实势
密度泛函
cluster, effective core potential, denstiy function