定制58电子金纳米集群的结构:Au103S2(S-Nap) 41及其影响
Tatsuya Higaki1, Chong Liu2, Meng Zhou1
1Department of Chemistry, Carnegie Mellon University , Pittsburgh, Pennsylvania 15213, United States.
Journal of the American Chemical Society
|June 30, 2017
概括
我们合成了一个金纳米团, Au103S2 ((S-Nap) 41, 这项研究强调了表面连接物如何独立于核心结构来修改黄金纳米集群属性.
科学领域:
- 无机化学
- 材料科学
- 纳米技术
背景情况:
- 黄金纳米集群表现出独特的电子和光学属性,由其核心结构和表面连接体来控制.
- 了解黄金核心和表面连接体之间的相互作用对于设计具有定制功能的纳米集群至关重要.
研究的目的:
- 合成和描述一个新的金纳米集群,Au103S2(S-Nap) 41,重点是其晶体结构和电子特性.
- 调查基于纳米的大型酸盐配体在影响纳米表面结构和整体特性方面的作用.
- 阐明纳米集核和表面配体对其电子和光学特征的各自贡献.
主要方法:
- 黄金纳米集群的合成.
- 单晶X射线衍射用于结构确定.
- 暂时吸收光谱用于分析激发状态的动态.
主要成果:
- 确定了Au103S2 ((S-Nap) 41的晶体结构,其中包括马克斯十面体Au79核和表面四面体硫酸盐排列.
- 酸通过C-H··π和π··π堆叠形成局部四基体,导致鱼骨模式和齐克扎克的晶体结构.
- Au103和Au102纳米团表现出类似的HOMO-LUMO间隙能量,表明核的优势,但显示出不同的激发状态寿命,表明对电子动态的联体影响.
结论:
- 十面体内核结构坚固且独立于连接体大小.
- 表面配体显著影响纳米团的表面结构和电子动态,尽管保留了核.
- 这项工作在确定58电子金纳米集群的电子和光学性质方面区分了核心和表面连接体的作用.
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