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Citation: XU Can, ZHU Li-fang, GAO Chen-yang, CAO Juan. Density Functional Study on Silica Clusters (SiO₂)nO₂H₄[J]. Acta Physico-Chimica Sinica, ;2006, 22(02): 152-155. doi: 10.3866/PKU.WHXB20060205 shu

Density Functional Study on Silica Clusters (SiO₂)nO₂H₄

1.
School of Physical Science and Technology, Lanzhou University, Lanzhou Gansu 730000, P. R. China; Key Laboratory for Magnetism and Magnetic Materials of MOE, Lanzhou University, Lanzhou Gansu 730000, P. R. China

Received Date: 21 July 2005
Available Online: 22 January 2006

Two new structures of cage (terminal cage) and ring for silica clusters (SiO2)nO2H4 (n＝2～22, n is even) are presented and compared with line structure. Geometric structures, average binding energies, energy gaps and second order difference of energy are systematically studied by density function theory (DFT) B3LYP with basis set 6-31G(d). The results indicate that for cage structures of (SiO2)nO2H4 (n＝2～22, n is even) magic number clusters exist not only at n=4, 8, but also at n=14. Ring structures of (SiO2)nO2H4 clusters are different from that of (SiO2)n. For the latter they are more stable than line structures from n=11. However, for the former it is from n=4 ring structures begin to be more stable than line structures. It means that the addition of water has an important effect on the stabilities of silica clusters.
- Cluster;Magic number;Density functional theory;Structure;Mechanism
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沈阳化工大学材料科学与工程学院沈阳 110142

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Density Functional Study on Silica Clusters (SiO2)nO2H4

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通讯作者: 陈斌, bchen63@163.com

Density Functional Study on Silica Clusters (SiO₂)nO₂H₄