基于共晶转换的可调色升级转换发射开关
Yu Wang1, Huang Wu1, Leighton O Jones1
1Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States.
Journal of the American Chemical Society
|January 16, 2023
概括
研究人员使用两种相互转换的共晶来开发了可调色的上转换-发射开关. 这一突破可以精确控制固态材料的颜色, 为先进的光学材料提供一个新的平台.
科学领域:
- 材料科学
- 超分子化学
- 光物理学
背景情况:
- 晶工程是固态材料光物理特性调整的关键.
- 实现可逆转换和控制的组装/拆卸多组件共晶仍然是一个重大挑战.
- 向上转换的发射,特别是双光子激发,对于先进的光学应用至关重要.
研究的目的:
- 开发一个可调色的升级转换-发射开关.
- 为了证明可逆的共晶转化.
- 探索分子间电荷转移在调节辐射特性中的作用.
主要方法:
- 两种不同的共晶体的合成,使用基于纳二胺的宏循环和不同的电子捐赠者.
- 同晶体结构及其固态特性.
- 研究由电子捐赠者交换引发的可逆转换.
- 测量两个光子激发上升转换的辐射光谱.
主要成果:
- 两种红色和黄色的共晶体已经成功合成.
- 通过交换电子捐赠者来实现红色和黄色发射共晶之间的可逆互转.
- 由于分子间的电荷转移,共晶体表现出强烈的两光子激发上转换辐射.
- 一个双色上转换-排放开关被证明通过cocrystal交换.
结论:
- 精确控制共晶转化是可以实现的.
- 这项工作提供了一种新的双色上转换-排放开关.
- 这些发现为设计可调色的非线性光学材料提供了宝贵的参考.
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