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A two-dimensional TiB4 monolayer exhibits planar octacoordinate Ti
Qu, X.; J. H. Yang; Y. C. Wang; J. Lv; Z. F. Chen and Y. M. Ma
2017
发表期刊Nanoscale
卷号9期号:45
摘要At present, the concept of planar hypercoordination in chemistry meets the fast development of twodimensional (2D) nanomaterials, leading to considerable interest in searching for 2D materials with planar hypercoordinate atoms. In this work, by means of the swarm-intelligence structure search method and first-principles calculations, we predict a hitherto unknown 2D TiB4 monolayer with a planar octacoordinate Ti moiety, in which each Ti atom binds to eight B atoms with equal distances in a perfect plane, and has the highest coordination of Ti known for 2D materials thus far. Systematic ab initio calculations demonstrate the superior thermodynamic and dynamic stabilities of the predicted TiB4 monolayer, indicating the high feasibility for experimental synthesis. The stabilization of this perfect planar structure originates from the geometric fit between the atomic radius of Ti and the size of the 8-membered B ring, as well as the electron transfer from Ti to B atoms which compensates the electron deficiency of the full sp(2) hybridized B network. Motivated by the unforeseen geometry of the TiB4 monolayer, a series of other 2D transition metal borides (TMB4, TM = V, Cr, Mo, W and Os) with quasi-planar octacoordinate TM atoms are further designed and discussed. The present work provides a useful roadmap for the discovery of 2D hypercoordinate materials.
收录类别sci ; ei
语种英语
文献类型期刊论文
条目标识符http://ir.ciomp.ac.cn/handle/181722/59167
专题中科院长春光机所知识产出
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Qu, X.,J. H. Yang,Y. C. Wang,et al. A two-dimensional TiB4 monolayer exhibits planar octacoordinate Ti[J]. Nanoscale,2017,9(45).
APA Qu, X.,J. H. Yang,Y. C. Wang,J. Lv,&Z. F. Chen and Y. M. Ma.(2017).A two-dimensional TiB4 monolayer exhibits planar octacoordinate Ti.Nanoscale,9(45).
MLA Qu, X.,et al."A two-dimensional TiB4 monolayer exhibits planar octacoordinate Ti".Nanoscale 9.45(2017).
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