基于比西奥芬的灵活路易斯对的可调节发光
Yang Cao1, Jeffrey K Nagle2, Michael O Wolf1
1†Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.
Journal of the American Chemical Society
|April 11, 2015
概括
基于比西奥芬的灵活的易斯对可以在开放和封闭结构之间切换. 开放形式呈现电荷转移发光,受溶剂极性和温度的影响,导致可调节的发射特性.
科学领域:
- 超分子化学 超分子化学
- 有机电子 有机电子
- 光物理学的光学物理学
背景情况:
- 易斯对在催化和材料科学中至关重要.
- 设计可切换的分子系统是先进应用的关键.
- 比提奥芬支架具有独特的电子和结构性质.
研究的目的:
- 为了合成和表征基于比西奥芬的灵活的易斯对.
- 为了研究这些易斯对的结构切换行为.
- 探索光物理性质,特别是电荷转移 (CT) 发光,以及它们对环境的依赖.
主要方法:
- 与易斯酸性 (BMes2) 和易斯基本性 (P(O) R2) 基团功能化的比西奥芬衍生物的合成.
- 光谱技术 (NMR,UV-Vis,光) 用于研究结构转变.
- 可变温度和取决于溶剂的排放研究,以探测发光机制.
主要成果:
- 基于比提奥芬的易斯对表现出关闭 (附加) 和开放 (不结合) 状态之间的可逆切换.
- 开放状态,受键捐赠溶剂和更高温度的青,显示强烈的电荷转移 (CT) 发光.
- 水溶液和中间溶剂导致混合发射,可通过激发波长调节,由于两种状态的平衡.
结论:
- 基于比提奥芬的柔性易斯对显示出可控制的结构动态.
- 观察到的可调节CT发光为开发响应性材料和传感器提供了潜力.
- 这项工作突出了功能性有机材料中分子结构,环境和光物理性质之间的相互作用.
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