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第一性原理对Ga_nP_m~-阴离子团簇结构及其光电子能谱的研究(英文)
First principles Study on structures and photoelectron spectroscopy about Ga_nP_m~- anions
【摘要】 本文利用密度泛函理论(DFT)对GanP-(n=2-7)和GanP2-(n=1-6)阴离子团簇的几何结构、电子态及稳定性进行了研究.在B3LYP/6-31G*水平上进行了结构优化和频率分析,得到了GanP-(n=2-7)和GanP2-(n=1-6)团簇的基态结构.这些阴离子团簇的几何结构随着n的增大,在n=5时由平面结构转化为立体结构;在GanP2-(n=1-6)团簇中,P-P比Ga-P容易成键;在GanP-(n=2-7)和GanP2-(n=1-6)阴离子团簇中,Ga3P2-,Ga4P2-,Ga5P2-和Ga6P-的基态结构最稳定.
【Abstract】 The density functional theory(DFT) is carried out on the low lying geometric structure,electronic state and energy of GanP-(n=2-7) and GanP-2(n=1-6) anionic clusters.Structural optimization and frequency analysis are performed at the level B3LYP/6-31+G*.The ground state of GanP-(n=2-7) and GanP-2(n=1-6) anion clusters are found.With increasing cluster size we find transitions from planar to nonplanar structures at n=5.The strong P-P bond is favored over P-Ga in GanP-2(n=1-6) anionic clusters.Among different GanP-(n=2-7) and GanP-2(n=1-6) clusters,Ga3P-2,Ga4P-2,Ga5P-2 and Ga6P-are more stable.
【Key words】 Ga_nP~-_m anionic clusters; density functional theory(DFT); geometric structure;
- 【文献出处】 原子与分子物理学报 ,Journal of Atomic and Molecular Physics , 编辑部邮箱 ,2006年02期
- 【分类号】O561.3
- 【被引频次】9
- 【下载频次】138