具有可调节光学特性的N-异环碳素稳定硬币金属基基框架
Alexander M Polgar1, Florian Weigend2,3, Angel Zhang1
1Department of Chemistry, The University of Western Ontario , London, Ontario N6A 5B7, Canada.
Journal of the American Chemical Society
|September 28, 2017
概括
合成了具有硬币金属 (Ag,Au) 和素 (S,Se,Te) 的新发光金团. 它们的可调节光源来自电子转换,可以控制光发射特性.
科学领域:
- 无机化学
- 材料科学
- 摄影化学
背景情况:
- 在有机金属化学中,N- heterocyclic carbenes (NHCs) 是一种多用途的配体.
- 黄金 (I) 石化集群因其光发光特性而有意义.
研究的目的:
- 合成和描述一个新的八核硬币金属化物集群.
- 研究光发光特性和影响发射能量的因素.
主要方法:
- 使用NHC结合黄金I) 前体和金属酸盐合成[Au4M4(μ3-E) 4(IPr) ]集群 (M = Ag,Au;E = S,Se,Te).
- 在77K的光发光谱中,在玻璃状的2-甲基四和固体状态下.
- 时间依赖密度函数理论 (TD-DFT) 计算以分析电子转换.
主要成果:
- 通过NHC连接物稳定了新一类八核金银和金金聚合物的成功合成.
- 从可调节的发射能量中观察合成集群的光.
- TD-DFT计算显示,可调节的发射是由于混合的联体到金属电荷转移 (IPr → AuM2) 和联体间 (IPr → E) 光特性.
结论:
- 通过NHC连接物,可以选择性合成具有受控金属和 chalcogen 组成的发光黄金.
- 可调节的光具有在光电子设备中的应用潜力.
- 这项工作扩大了发光硬币金属化物化学的范围.
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