...
首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Bridging gold in electron-deficient Al_2Aun ~(0/-) and BAlAu_n ~(0/-) (n = 1-3) clusters
【24h】

Bridging gold in electron-deficient Al_2Aun ~(0/-) and BAlAu_n ~(0/-) (n = 1-3) clusters

机译:在缺电子的Al_2Aun〜(0 /-)和BAlAu_n〜(0 /-)(n = 1-3)簇中桥接金

获取原文
获取原文并翻译 | 示例
           

摘要

The geometrical and electronic structures of the electron-deficient dialuminum aurides Al_2Aun ~(0/-) and hybrid boron-aluminum aurides BAlAun ~(0/-) (n = 1-3) are systematically investigated based on the density and wave function theories. Ab initio theoretical evidence strongly suggests that bridging gold atoms exist in the ground states of C_(2v) Al_2Au~- (~ 3B_1), C_(2v) Al_2Au (~2B _1), C_(2v) Al_2Au_2 ~- (~2A_1), C_(2v) Al_2Au_2 (~1A_1), C_s Al_2Au_3 ~- (~1A), and D_(3h) Al_2Au_3 (~2A_1), which prove to possess an Al-Au-Al τ bond. For BAlAu_n ~(0/-) (n = 1-3) mixed clusters, bridging B-Au-Al units only exist in C_s BAlAu_3 ~- (~1A) and C_s BAlAu_3 (~2A), whereas C_s BAlAu~- (~3A′), C_s BAlAu (~2A′), C_s BAlAu_2 ~- (~ 2A), and Cs BAlAu_2 (~1A) do not possess a bridging gold, as demonstrated by the fact that B-Al and B-Au exhibit significantly stronger electronic interaction than Al-Au in the same clusters. Orbital analyses indicate that Au 6s contributes approximately 98%-99% to the Au-based orbital in these Al-Au-Al/B-Au-Al interactions, whereas Au 5d contributes 1%-2%. The adiabatic and vertical detachment energies of Al _2Au_n ~- (n = 1-3) are calculated to facilitate future experimental characterizations. The results obtained in this work establish an interesting τ bonding model (Al-Au-Al/B-Au-Al) for electron-deficient systems in which Au 6s plays a major factor.
机译:基于密度和波函数理论,系统地研究了缺电子的二铝铝化物Al_2Aun〜(0 /-)和混合硼铝铝化物BAlAun〜(0 /-)(n = 1-3)的几何和电子结构。 。从头开始的理论证据强烈表明,桥接金原子存在于C_(2v)Al_2Au〜-(〜3B_1),C_(2v)Al_2Au(〜2B _1),C_(2v)Al_2Au_2〜-(〜2A_1)的基态中,C_(2v)Al_2Au_2(〜1A_1),C_s Al_2Au_3〜-(〜1A)和D_(3h)Al_2Au_3(〜2A_1),证明具有Al-Au-Alτ键。对于BAlAu_n〜(0 /-)(n = 1-3)混合簇,桥接B-Au-Al单元仅存在于C_s BAlAu_3〜-(〜1A)和C_s BAlAu_3(〜2A)中,而C_s BAlAuu--( 〜3A'),C_s BAlAu(〜2A'),C_s BAlAu_2〜-(〜2A)和Cs BAlAu_2(〜1A)不具有桥接金,这一事实证明了B-Al和B-Au的存在在相同的簇中,电子相互作用比Al-Au强得多。轨道分析表明,在这些Al-Au-Al / B-Au-Al相互作用中,Au 6s对基于Au的轨道贡献约98%-99%,而Au 5d贡献1%-2%。计算了Al _2Au_n〜-(n = 1-3)的绝热和垂直脱离能,以利于将来的实验表征。在这项工作中获得的结果建立了一个有趣的τ键模型(Al-Au-Al / B-Au-Al),用于其中Au 6s起主要作用的电子缺陷系统。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号