[Ru(bpy) 2(dppp2) ]2+2的低层3MLCT状态的超快动态
Yujie Sun1, Yao Liu, Claudia Turro
1Department of Chemistry, The Ohio State University, Columbus, Ohio 43210, USA.
复合物的兴奋状态动态[Ru(bpy) ((2) ((dppp2))) ((2+),显示出强烈依赖于溶剂极性. 这与相关的[Ru(bpy) ((2) ((dppz) ] ((2+) 复合体形成鲜明对比,表明了独特的兴奋状态行为.
科学领域:
- 摄影化学的使用.
- 协调化学 协调化学
- 频谱学是一种光谱学.
背景情况:
- 金属复合物的兴奋状态动态对于理解它们的光化学性质至关重要.
- "DNA光开关"复合体[Ru(bpy) ((2) ((dppz) ] ((2+) 呈现出独特的光物理行为.
- 结构相似的复合体可能会显示出不同的激发状态路径.
研究的目的:
- 为了研究[Ru(bpy) ((2) ((dppp2))) ((2+)) 的兴奋状态动态的溶剂依赖性.
- 为了比较[Ru(bpy) ((2) ((dppp2))) ((2+) 的光物理行为与[Ru(bpy) ((2) ((dppz))) ((2+).
- 阐明溶剂极性和结在激发状态过程中的作用.
主要方法:
- 使用了超快速的短暂吸收光谱法.
- 该研究的重点是皮秒和纳秒时间尺度.
- 通过使用各种有机溶剂,系统地研究了溶剂的影响.
主要成果:
- [Ru ((bpy) ((2) ((dppp2))) ((2+)) 显示了从 (3) MLCT ((prox) 状态中离散形成最低层的 (3) MLCT ((dis) 状态.
- [Ru(bpy) ((2) ((dppp2))) ((2+) 的相互转换率和兴奋状态寿命强烈依赖于溶剂极性和键.
- 这些依赖溶剂的效应没有观察到[Ru(bpy) ((2) ((dppz) ] ((2+).
结论:
- 溶剂极性和键显著影响[Ru(bpy) ((2) ((dppp2))) ((2+) 的兴奋状态动态.
- (3) MLCT (((dis) 状态的稳定受溶剂特性的影响.
- [Ru ((bpy) ((2) ((dppp2) ]](2+) 显示出独特的依赖溶剂的光物理行为,与[Ru ((bpy) ((2) ((dppz) ](2+) 不同.
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