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B111, B112, B113, and B114: The most stable core-shell borospherenes with an icosahedral B12 core at the center exhibiting superatomic behaviors
Nano Research ( IF 9.5 ) Pub Date : 2021-03-27 , DOI: 10.1007/s12274-021-3411-x
Min Zhang , Hai-Gang Lu , Si-Dian Li

Boron allotropes are known to be predominately constructed by icosahedral B12 cages, while icosahedral-B12 stuffing proves to effectively improve the stability of fullerene-like boron nanoclusters in the size range between B98–B102. However, the thermodynamically most stable core-shell borospherenes with a B12 icosahedron at the center still remains unknown. Based on the structural motif of D5h C70 and extensive first-principles theory calculations, we predict herein the high-symmetry C5v B111+ (3) which satisfies the Wade’s n+1 and n+2 skeletal electron counting rules exactly and the approximately electron sufficient Cs B111 (4), Cs B112 (5), Cs B113 (6), and Cs B114 (7) which are the most stable neutral core-shell borospherenes with a B12 icosahedron at the center reported to date in the size range between B68–B130, with Cs B112 (5) being the thermodynamically most favorite species in the series. Detailed orbital and bonding analyses indicate that these spherically aromatic species all contain a negatively charged icosahedral B122− core at the center which exhibits typical superatomic behaviors in the electronic configuration of 1S21P61D101F8, with its dangling valences saturated by twelve radial B-B 2c-2e σ bonds between the B12 inner core and the B70 outer shell. The infrared (IR) and Raman spectra of the concerned species are computationally simulated to facilitate their future characterizations.



中文翻译:

B111、B112、B113 和 B114:最稳定的核壳硼球烯,其中心有一个二十面体 B12 核,表现出超原子行为

已知硼同素异形体主要由二十面体 B 12笼构成,而二十面体-B 12填料证明有效提高了尺寸范围在 B 98 -B 102之间的富勒烯类硼纳米团簇的稳定性。然而,在中心具有 B 12二十面体的热力学最稳定的核壳硼烯仍然未知。基于D 5 h C 70的结构基序和广泛的第一性原理理论计算,我们在这里预测了高对称性C 5 v B 111 + ( 3) 完全满足韦德的n +1 和n +2 骨架电子计数规则,并且近似电子充足C s B 111 ( 4 ), C s B 112 ( 5 ), C s B 113 ( 6 ), 和C s B 114 ( 7 ) 是迄今为止最稳定的中性核壳硼球烯,其中心有一个 B 12二十面体,尺寸范围在 B 68 – B 130之间,Cs B 112 ( 5 ) 是该系列中热力学最喜欢的物种。详细的轨道和键合分析表明,这些球形芳香族物质都在中心含有带负电荷的二十面体 B 12 2−核,在 1S 2 1P 6 1D 10 1F 8的电子构型中表现出典型的超原子行为,其悬空价由B 12内核和B 70之间有12个径向BB 2c-2e σ键外壳。相关物种的红外 (IR) 和拉曼光谱经过计算模拟,以促进其未来的表征。

更新日期:2021-03-27
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