化学学报 ›› 2004, Vol. 62 ›› Issue (18): 1669-1677.    下一篇

研究论文

CnP44(n=1~7)团簇结构与能量的密度泛函研究

陈明旦, 党丽, 梁晖, 刘明宏, 张乾二   

  1. 固体表面物理化学国家重点实验室, 厦门大学化学系, 理论化学研究中心, 厦门, 361005
  • 投稿日期:2004-04-19 修回日期:2004-05-18 发布日期:2014-02-17
  • 通讯作者: 陈明旦,E-mail:mdchen@xmu.edu.cn E-mail:mdchen@xmu.edu.cn
  • 基金资助:
    国家自然科学基金、福建省科技计划重大基金(No.2002F010)资助项目.

A Density Functional Study on the Structures and Energies of CnP44(n=1~7) Clusters

CHEN Ming-Dan, DANG Li, LIANG Hui, LIU Ming-Hong, ZHANG Qian-Er   

  1. State Key Laboratory for Physics Chemistry of Solid Surfaces, Department of Chemistry, Center for Theoretical Chemistry, Xiamen University, Xiamen 361005
  • Received:2004-04-19 Revised:2004-05-18 Published:2014-02-17

使用分子图形软件设计出多种CnP4-(n=1~7)的结构模型,并进行B3LYP密度泛函几何构型优化和振动频率计算.最稳定的C4-和C2P3-都是平面环状结构.最稳定的CnP4-(n=3,5,7)结构在直碳链的一端连接1个磷原子且另一端是P3C的四元环的平面结构.最稳定的CnP4-(n=4,6)结构在直碳链的一端连接1个磷原子且另一端是P3的三元环的锄状结构.直碳链可与平面环的磷原子生成大π键.大多数构型是由C2,C3,C4子结构以环状或链状方式组成的.碳原子与磷原子以交替方式排列的结构数量少、能量高.

关键词: 碳/磷二元团簇, B3LYP, 密度泛函

Using molecular graphics software, numerous models of CnP4- (n=1~7) have been designed. Geometry optimization and calculation on vibrational frequency were carried out by means of the B3LYP density functional method. After comparing the total energies of the isomers, it was found that the ground state structures of CP4- and C2P4- are planar ring ones. The most stable structures of CnP4- (n=3, 5, 7) are straight carbon chains connected a P3C ring at one end and a phosphorus atom at the other. The ground state structures of CnP4- (n=4, 6) are not planar with straight carbon chains with a P3 ring connected at one end and a phosphorus atom at the other. Other than a number of individual isomers, the structures with carbon and phosphorus atoms connected alternately are less and unstable. Most of the stable models are with C2, C3 and C4 units in the form of ring or chain connected to different phosphorus units.

Key words: C/P binary cluster, B3L YP, density functional study