降低性转化Imine共价有机框架成排放性聚合物:关于排放灭的见解
Agata Tyszka-Gumkowska1, Mateusz Brzeziński2, Sylwester Gawinkowski2
1Centre of Excellence ENSEMBLE3 Sp. zo.o., Wólczyńska 133, 01-919 Warsaw, Poland.
概括
研究人员将非排放性因胺结合的共价有机框架 (COF) 转化为高排放性氨基基基共价有机聚合物 (COP). 这种转变通过使固态发射成为可能,提高了它们在光电子应用中的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 有机化学 有机化学
- 光物理学的光学物理学
背景情况:
- 胺联共价有机框架 (COF) 很容易合成,但缺乏内在排放,限制了它们在光电子中的使用.
- 了解COF和相关材料中的兴奋状态能量消散对于开发新的功能材料至关重要.
研究的目的:
- 开发一种方法,从非排放前体中制造出排放性共价有机材料.
- 阐明控制因胺和氨基基共价有机框架和聚合物的兴奋状态能量消散的机制.
主要方法:
- 通过使用NaBH3CN/酸,将以烯为基础的imine-COFs减少为以胺为基础的共价有机聚合物 (am-COPs).
- 具有 imine 和 amine 功能的分子参考化合物的合成.
- 光物理特征和密度函数理论 (DFT) 计算.
主要成果:
- 在转换的am-COPs中,获得的固态排放量子产量高达30%.
- 证明imine和amine激发状态都表现出弱电荷转移 (CT) 特性.
- 表明CT过程中的聚合物排放受材料内在极性影响.
结论:
- 一个简单的减排策略有效地将无排放的imine-COF转化为高排放的am-COP.
- 这项研究为COF和COP的光物理行为提供了基本的见解,将排放与电荷转移过程和极性联系起来.
- 这些发现为设计用于先进应用的新型排放性多孔材料铺平了道路.
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