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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Possibility of the Existence of Non-Carbon Fullerenes: Ab Initio HF and DFT/B3LYP Studies of the IV Main Group Fullerene-Like Species
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Possibility of the Existence of Non-Carbon Fullerenes: Ab Initio HF and DFT/B3LYP Studies of the IV Main Group Fullerene-Like Species

机译:非碳富勒烯存在的可能性:从头算HF和DFT / B3LYP研究第四类富勒烯的主要物种

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摘要

A comprehensive investigation of the equilibrium geometries, cohesive energies, and electronic properties of the IV main group fullerene-like compounds C_(60), Si_(60),Ge_(60), Sn_(60), and Pb_(60), has been performed by ab initio molecular modeling at the HF/Lanl1DZ and B3LYP/LanllDZ levels. In addition, the effect of the basis set on the structure and properties of C_(60) and Si_(60) has been examined at the STO-3G, LanllDX, and 6-31 G(d) levels. Our calculations confirmed the possibility of the existence of these species. It was found that the values of the relative bond alternation, cohesive energy, HOMO-LUMO gap, and the ionization potential of the molecules decrease monotonically in going down the IVth group from C_(60) to Pb_(60). The obtained data for Ge_(60) is rather similar to the one for Si_(60), and also the molecular parameters for Sn_(60) are close to the appropriate values both for Si_(60) and Ge_(60).
机译:对IV主族类富勒烯类化合物C_(60),Si_(60),Ge_(60),Sn_(60)和Pb_(60)的平衡几何构型,内聚能和电子性质进行了全面研究通过从头算分子模型在HF / LanlDZ和B3LYP / LanllDZ水平上进行。此外,已经在STO-3G,LanllDX和6-31 G(d)级别上检查了基集对C_(60)和Si_(60)的结构和性质的影响。我们的计算证实了这些物种存在的可能性。结果发现,当第IV个基团从C_(60)下降到Pb_(60)时,相对键交替,内聚能,HOMO-LUMO间隙和分子的电离势的值单调降低。获得的Ge_(60)数据与Si_(60)的数据非常相似,并且Sn_(60)的分子参数也接近Si_(60)和Ge_(60)的适当值。

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