C_nAl^+小团簇结构的几何特征与稳定性  

Structural Characteristics and Stability of C_nAl^+ Small-Size Clusters

作　　者：马文瑾[1] 宋翔[1] 张献明[1] 武海顺[1] 

机构地区：[1]山西师范大学化学与材料科学学院,山西临汾041004

出　　处：《物理化学学报》2010年第5期1396-1400,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(20771069;20871077);山西省高校科技项目(20091015)资助~~

摘　　要：采用密度泛函理论(DFT)的B3LYP方法,研究了CnAl+(n=2-12)团簇的几何结构与电子性质.在6-311++G**水平上对CnAl+(n=2-12)团簇进行了几何构型优化和振动频率计算.结果表明,CnAl+团簇的基态结构为Al原子与Cn链端基配位形成的直线或折线形结构,以及Al原子与Cn环上1个C原子端位相连或打开Cn环与2个C原子相连形成的环状结构.分子总的平均键长随着n的增大逐渐趋于定值(0.138nm).通过对基态结构的能量分析,得到了CnAl+团簇的稳定性信息.The geometric and electronic properties of CnA^l＋（n=2-12） clusters were investigated using the B3LYP method of density functional theory（DFT）.Structural optimization and frequency analyses were performed with the 6311＋＋G^＊＊ basis set.Calculation results showed that the ground state of the CnAl^＋ clusters was a linear or polyline structure with a terminal aluminum atom,and an aluminum atom was inserted into the Cn ring to form a new ring structure or an aluminum atom bonded to one side of the monocyclic Cn ring.With an increase in n,the total average molecular bond length gradually approached 0.138 nm.We obtained stability information by an energy analysis of the ground state.

关 键 词：密度泛函理论 CnAl+团簇 基态结构 稳定性 

分 类 号：O641.1[理学—物理化学]