一个新的结合图案的硬质要求的酸盐在一个黄金集群上的结合图案
Jun-ichi Nishigaki1, Risako Tsunoyama, Hironori Tsunoyama
1Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
Journal of the American Chemical Society
|August 21, 2012
概括
研究人员使用重的阿雷尼醇配体合成了一种新的黄金集群,Au{41) }{S-Eind}{12). 这种方法抑制了黄金硫酸盐寡合体的形成,与传统的黄金集群保护策略不同.
科学领域:
- * 纳米材料科学 科学 纳米材料科学
- * 无机化学 无机化学
- * 表面的化学成分
背景情况:
- * 黄金集群是具有独特光学和电子特性的有前途的纳米材料.
- * 传统合成通常涉及酸盐连接体,这可能导致黄金-酸盐接口的不必要的寡合化.
- * 控制接口结构对于定制黄金集群的特性至关重要.
研究的目的:
- * 合成和描述一个由重的阿雷尼醇连接体保护的新型黄金集群.
- * 为了研究体积庞大的配体对黄金-硫酸盐寡合物的形成的影响.
- * 为了比较接口结构与传统合成的酸盐保护黄金集群.
主要方法:
- * 通过将1,1,3,3,5,5,7,7-octaethyl-s-hydrindacene-4-thiol (Eind-SH) 结合到预制的黄金集群,合成黄金集群Au{41) }{S}-Eind{12}.
- *使用扩展X射线吸收细结构 (EXAFS) 进行了表征.
- *通过X射线光电子光谱 (XPS) 进行表面分析.
- * 通过质谱 (MS) 分碎模式进行结构调查.
主要成果:
- *成功合成了Au{41) }{S-Eind) }{12) 的黄金团.
- *EXAFS,XPS和MS分析证实了 gold-thiolate在界面上的寡合体形成的抑制.
- * Eind-SH 配体的体积庞大性质有效地防止了界面寡合化.
结论:
- *使用重的阿雷尼醇配体为合成明确定义的黄金集群提供了一种新策略.
- * 抑制界面寡合化导致与传统集群相比具有独特的结构和潜在的电子特性.
- *这种方法可以更好地控制黄金集群结构和稳定性.
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