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H2O-H2O分子相互作用势能面的从头算
  • 期刊名称:四川大学学报(自然科学版), 2007, 44(3): 627.
  • 时间:0
  • 分类:O56[理学—原子与分子物理;理学—物理]
  • 作者机构:[1]四川大学物理科学与技术学院,成都610064
  • 相关基金:国家自然科学基金(10576020)
  • 相关项目:高密度氮、一氧化碳和碳混合物相互作用势与混合法
中文摘要:

我们阐述了基于从头算的H2O-H2O四维分子间势能面(IPS).利用超分子方法MP3理论基准面,计算6305个能量点,用完全均衡校正法消除基组重叠误差.势能曲线特征如井深、势能最小值的位置也做了详细研究,对变化位置的震动频率也做了全面分析.

英文摘要:

A new four-dimensional intermolecular potential energy surface(IPS) for H2O dimer on the basis of ab initio calculations is presented. 6305 energy points were calculated with the supermolecular approach MP3 level of theory. Full counterpoise correction has been used to eliminate the basis set superposition error. Characteristics of the potential energy curves, such as well-depth, position of the potential minimum, etc. have been studied in detail. Vibrational frequencies for the variable positions have been completely analysed.

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