采用密度泛函理论(DFT)的B3LYP方法,在6-311++G^**水平上对CnAl(n=2-11)团簇的几何构型和电子结构进行了结构优化和振动频率计算.结果表明,n=2的CnAl团簇基态结构为Al原子与两个C原子相连形成的环状结构,n=3-11均为Al原子端基配位的线状结构.通过对基态结构的能量分析,得到了n为偶数的CnAl团簇比n为奇数团族稳定的结论.
The density functional theory (DFT) method was used to investigate the geometries, electronic structures, and frequencies of CnAl (n=2-11) clusters. At the B3LYP/6-311++G^** level, the ground state of C2Al was a planar structure while other CnAl (n=3-11) were linear structures with terminal aluminum atom. The energetic analysis showed that CnAl clusters with even n were more stable than those with odd n.