基于硫酸盐-铜协调键的扩展二维金属有机框架.
Hermann Walch1, Jürgen Dienstmaier, Georg Eder
1Department for Earth and Environmental Sciences and Center for NanoScience, Ludwig-Maximilians-Universität, Theresienstrasse 41, 80333 München, Germany.
Journal of the American Chemical Society
|May 4, 2011
概括
在铜和银表面上立烯分子的自我组装揭示了明显的多孔网络. 铜表面促进金属协调键,导致与银相比较低的温度下独特的结构.
科学领域:
- 表面科学是一门科学.
- 超分子化学 超分子化学
- 材料科学是一种材料科学.
背景情况:
- 1,3,5-tris(4-mercaptophenyl) 二烯是一种三重对称的芳香三甲基.
- 了解基板介导的自我组装对于设计功能性纳米材料至关重要.
研究的目的:
- 研究1,3,5-tris(4-mercaptophenyl) 在Cu(111) 和Ag(111) 上的自我组装和表面介导反应.
- 阐明分子间键的性质和基质在它们形成中的作用.
- 在不同的热条件下对不同金属表面的结构结果进行比较.
主要方法:
- 在超高真空 (UHV) 条件下扫描道显微镜 (STM).
- 室温沉积和热回火实验.
- 密度函数理论 (DFT) 计算以确定结合.
主要成果:
- 密集的三角形结构在室温下在Cu{111}和Ag{111}上形成.
- 在Cu{111}上,在150°C时出现了明显的多孔网络,而Ag{111}需要300°C的结构变化,形成具有二度体的无序结构.
- 在Cu{111}上由原子气体促进的金属协调键被确定为观察到的差异的关键.
结论:
- 基板在指导三醇分子的自我组装和结构演变方面发挥着至关重要的作用.
- 111) 在较低的温度下,由于金属协调结合,促进有序的多孔网络的形成.
- 德富特的分析证实了两个表面上不同的结合几何形状和距离.
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