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A difluoroboron β-diketonate-based luminescent material with tunable solid-state emission and thermally activated delayed fluorescence†
Materials Chemistry Frontiers ( IF 7 ) Pub Date : 2019-11-28 , DOI: 10.1039/c9qm00672a
Han Zhang 1, 2, 3, 4, 5 , Peng-Zhong Chen 1, 2, 3, 4, 5 , Li-Ya Niu 1, 2, 3, 4, 5 , Qing-Zheng Yang 1, 2, 3, 4, 5
Affiliation  

We demonstrate a solid luminescent material based on difluoroboron β-diketonate containing a triphenylamine moiety manifesting tunable solid-state luminescence and thermally activated delayed fluorescence (TADF). The compound shows strong fluorescence in both organic solutions and solid states. It exhibits significantly different emission colours in different aggregation states: bright orange emission in its crystalline solid state and red emission in the amorphous state. The orange and red emissive states are able to be reversibly switched by repetitive grinding–fuming processes with little fatigue. More importantly, the aggregation state plays a key role in the TADF properties. Its solid exhibits TADF properties in the amorphous state but not in the crystalline solid state due to the different ΔEST values in the relative morphologies.

中文翻译:

具有可调节的固态发射和热激活的延迟荧光的基于二氟硼β-二酮酸酯的发光材料

我们展示了一种基于二氟硼β-二酮酸酯的固体发光材料,该材料包含三苯胺部分,该三苯胺部分表现出可调节的固态发光和热激活延迟荧光(TADF)。该化合物在有机溶液和固态下均显示强荧光。它在不同的聚集状态下显示出明显不同的发射颜色:在其结晶固态下为亮橙色,在非晶态下为红色。橙色和红色发射状态可以通过反复磨削-发烟过程可逆地切换,而不会产生疲劳。更重要的是,聚合状态在TADF属性中起着关键作用。由于不同的ΔE ST,其固体在非晶态下表现出TADF特性,而在结晶固态下不表现出TADF特性。 相对形态中的值。
更新日期:2019-12-19
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