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首页> 外文期刊>Chinese science bulletin >Formation, structure and properties of GeC_n~(+-) and Ge_2C_n~(+-) binary clusters
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Formation, structure and properties of GeC_n~(+-) and Ge_2C_n~(+-) binary clusters

机译:GeC_n〜(+-)和Ge_2C_n〜(+-)二元簇的形成,结构和性质

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The binary cluster ions Ge_2C_n~+/Ge_2C_n~- and GeC_n~+ have been produced by laser ablation. The parity effect is present in the negative ions Ge_2C_n~-, though it is not very prominent. While the experiments tell that the parity effect is totally not shown in the positive ions Ge_2C_n~+. An extensive theoretical investigation on GeC_n/GeC_n~+/GeC_n~-(n = 1-10) and Ge_2C_n/Ge_2C_n~+/Ge_2C_n~-(n = 1-9) has been carried out by density functional theory at B3LPY level. The calculation shows that the low-lying states of GeC_n/GeC_n~+/GeC_n~-(n = 1-10) and Ge_2C_n/Ge_2C_n~+/Ge_2C_n~- (n = 1-9) are linear structure with germanium atoms locating at terminals respectively. The electronic distributions, ionization potential (IP_(ad)), electron affinity (EA) and increasing bonding energy reveal that the parity effect of neutral species is much stronger than that of ions, which is attributed to the valence pi-electrons. It is explained that the differences between experiments and calculations are due to the kinetic factor in the formation of Ge_2C_n~(+-).
机译:通过激光烧蚀产生了二元簇离子Ge_2C_n〜+ / Ge_2C_n〜-和GeC_n〜+。奇偶效应存在于负离子Ge_2C_n〜-中,尽管不是很明显。实验表明,在正离子Ge_2C_n〜+中完全没有显示奇偶效应。通过密度泛函理论在B3LPY级别对GeC_n / GeC_n〜+ / GeC_n〜-(n = 1-10)和Ge_2C_n / Ge_2C_n〜+ / Ge_2C_n〜-(n = 1-9)进行了广泛的理论研究。计算表明,GeC_n / GeC_n〜+ / GeC_n〜-(n = 1-10)和Ge_2C_n / Ge_2C_n〜+ / Ge_2C_n〜-(n = 1-9)的低态为线性结构,锗原子位于在终端。电子分布,电离电势(IP_(ad)),电子亲和力(EA)和增加的键能表明,中性物质的奇偶效应比离子强得多,这归因于价电子。据解释,实验和计算之间的差异是由于形成Ge_2C_n〜(+-)的动力学因素。

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