同时热刺激的延迟光 (TSDP) 和热激活的延迟光 (TADF) 在两个协调的Au (I) 双金属复合体中,具有并联的碳素结构
Shu-Jia Zheng1, Jie Ma2, Junru Su2
1Department of Chemistry, University of Science and Technology Beijing, 30 XueYuan Road, Beijing 100083, China.
Journal of the American Chemical Society
|July 1, 2024
概括
研究人员合成了一种具有独特扭曲结构的新型黄金 (I) 复合物. 这种复合体具有双重发射,由于其结构灵活性,显示了热刺激延迟光 (TSDP) 和热激活延迟光 (TADF).
科学领域:
- 有机金属化学
- 材料科学
- 光物理学
背景情况:
- 碳金属胺 (cMa) 复合物因其独特的电子和光物理性质而有趣.
- 黄金中的调联体结构 (I) 复合物可以影响排放特性.
- 了解激发状态的动态对于开发先进的发光材料至关重要.
研究的目的:
- 合成和描述一种新的双金属,双协调的碳金属胺 (cMa) Au (I) 复合物.
- 研究光物理特性,包括热刺激延迟光 (TSDP) 和热激活延迟光 (TADF).
- 将分子结构和形状灵活性与观察到的双辐射现象相关联.
主要方法:
- 一个双金属Au(I) 复合物的合成,具有扭曲的合碳结构 (NHC1-Au-NHC2-Au-carbazolyl).
- 单晶X射线衍射用于详细的分子结构分析.
- 用光谱学研究 (发射光谱,寿命测量) 来描述晶体和合聚合物薄膜的光物理性质.
主要成果:
- 合成的复合体具有两个碳素连接体之间的大二面角,具有特定的共平面桥梁连接体.
- 在晶体中观察到超过70μs的蓝色绿色TSDP,归因于发射三重状态的旋转允许的糖尿病人群.
- 在合聚合物薄膜中观察到双排放 (TSDP和TADF),与S1状态的形状灵活性和稳定性有关,使得有效的系统间交叉.
结论:
- 在Au(I) 复合体中,基体的形状灵活性是实现双排放的关键.
- 该研究展示了设计具有可调节的TADF和TSDP属性的发光黄金复合物的策略.
- 这项工作有助于开发具有光电子领域潜在应用的新型有机发光材料.
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