在多态有机纳米晶体中通过光采集能量转移进行光发光异性放大
Meng-Jia Sun1,2, Yingying Liu1,2, Wei Zeng1,2
1Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences , Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190 , China.
Journal of the American Chemical Society
|April 5, 2019
概括
这项研究探讨了多态有机晶体中的光发光异性. 黄色发射纳米板显示高异性,而绿色纳米棒则由于明显的分子包装而表现出非极化发射.
科学领域:
- 材料科学
- 固态化学
- 光物理学
背景情况:
- 多态性和异态性是晶体材料的关键性质.
- 有机晶体中的结构依赖光发光 (PL) 异质性在很大程度上尚未被探索.
- 了解这些特性对于开发先进的光学材料至关重要.
研究的目的:
- 调查来自 (II) -β-二酸复合物的两个多态纳米晶体中的光发光异性.
- 将观察到的极化现象与纳米晶体的分子包装结构相关联.
- 展示异性晶体在增强极化辐射中的应用.
主要方法:
- 两种多态纳米晶体的合成:绿色发射纳米棒 (PtD-g) 和黄色发射纳米板 (PtD-y).
- 光发光 (PL) 属性的表征,包括异质性比测量.
- 分析晶体结构和分子包装安排.
- 用于放出偏振放大器的能量转移的演示.
主要成果:
- PtD-y纳米板表现出显著的PL异性 (比率高达0. 87).
- 几乎没有极化辐射.
- 分子包装差异被确定为变化的极化原因.
- 不同类型的PtD-y晶体成功地放大了受体 (PtA) 的极化发射.
结论:
- 多态有机晶体中的分子包装决定了它们的光发光异质性.
- 可以利用非同位素纳米晶体来增强光辐射的极化.
- 这项工作为设计极化发光有机材料开辟了道路.
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