Hg-Hg结合及其对 (HgS) 集群稳定性的影响
1Atomic and Molecular Physics Division, Physics Group Bhabha Atomic Research Centre Trombay, Mumbai-400085, India. jsekhar@barc.gov.in.
Physical chemistry chemical physics : PCCP
|September 2, 2024
概括
对硫化 (HgS) 的脉冲激光切除揭示了稳定的环团离子,高达 (HgS) 4+. 较弱的Hg-Hg结合会影响环稳定性,而链则会随着长度的增加而变得更加稳定.
科学领域:
- 材料科学 材料科学 材料科学
- 计算化学计算化学
- 化学物理 化学物理
背景情况:
- 二硫化物 (HgS) 的脉冲激光切除是一种产生集群离子的方法.
- 了解HgS集群的稳定性和电子性质对于材料科学应用至关重要.
研究的目的:
- 研究 (II) 硫化物 (HgS) 集群离子的结构性,能量性和电子性质.
- 阐明控制环和链 HgS 集群稳定性的因素.
- 为了验证稳定的HgS集群离子的实验观测.
主要方法:
- 对HgS前体进行脉冲激光切除.
- 密度函数理论 (DFT) 的计算,包括B3LYP和PBE0函数.
- 计算结构,原子化能量,HOMO-LUMO间隙和键导电量.
主要成果:
- 观察到 (HgS) n+,HgS±和[(HgS) n + S]±集群离子的形成.
- 最低能量单环 (HgS) n表现出稳定性,受弱Hg-Hg结合的影响.
- 链三联 (HgS) n集群的稳定性和键导电性随着大小的增加而增加.
- 稳定的集群离子到 (HgS) 4+ 的实验发现得到了验证.
结论:
- Hg2+离子之间的弱Hg-Hg键对环HgS团的稳定性产生重大影响.
- 性相互作用驱动长链HgS集群的稳定性,反映晶体结构.
- 计算方法成功地预测了HgS集群离子的行为和稳定性.
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