可见光驱动的氧化和基替代 鲁二胺复合物的光化学
Guocan Li1, Matthew D Brady1, Gerald J Meyer1
1Department of Chemistry , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599-3290 , United States.
Journal of the American Chemical Society
|March 30, 2018
概括
复合物RuBPZ2+与化物形成离子对,通过静态和动态灭途径影响其光发光. 这项研究阐明了电子转移机制,并确定了光产物,提供了对复杂光化学的见解.
科学领域:
- 协调化学
- 摄影化学
- 光物理学
- 复合物
背景情况:
- 在室温下,复合体 (RuBPZ) 呈现光发光 (PL).
- 了解RuBPZ2+与化物等反离子的相互作用对于调整其光物理性质至关重要.
- 离子配对可以显著改变金属复合物的兴奋状态行为和反应性.
研究的目的:
- 研究RuBPZ2+与乙烯酸之间的离子对形成.
- 用化物灭光发光的机制.
- 描述激发状态路径,电子转移动力学和光产物.
主要方法:
- 光谱技术包括光发光 (PL) 光谱和时间分辨率的PL测量.
- 纳米秒短暂吸收光谱用于研究反应中间体和动力学.
- 分析离子对结构的H NMR光谱和分析离子对结构的H NMR光谱以及估计氧化还原潜力的马库斯理论.
主要成果:
- RuBPZ2+与化物 ([RuBPZ2+,Br-+]) 形成一个单一的离子对,其平衡常数高 (K=8400M-1).
- 化物通过静态 (离子对) 和动态 (自由复合体) 路径灭RuBPZ2+ PL,具有不同的激发状态寿命和速率常数.
- 电子转移导致RuBPZ+和Br2•-,它们重组;在长时间的光解过程中形成了配体替代的光产物.
结论:
- 离子配对化物对RuBPZ2+的光物理性质有显著影响,导致不同的火机制.
- 详细的动力分析提供了电子转移,重组和Br2形成的速率常数.
- 这项研究揭示了复杂的光化学途径,涉及激发状态电子转移以及随后的产品形成和重组.
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