控制9H-二苯并[a,c]咔唑衍生物的高效超长室温磷光用于可擦光打印,Materials Chemistry Frontiers

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控制9H-二苯并[a,c]咔唑衍生物的高效超长室温磷光用于可擦光打印
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2023-09-13 , DOI: 10.1039/d3qm00883e
Wei Cai ₁ , Lingqi Zuo ₂ , Shiya Feng ₂ , Pengtao Hu ₂ , Hengshan Wei ₂ , Zhexian Zhang ₂ , Hongru Wu ₁ , Leyu Wang ₁ , Yuhai Wang ₂ , Guang Shi ₂ , Bingjia Xu ₂

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开发在环境条件下同时具有高磷光量子产率（Φ _phos.）和超长磷光寿命（τ _phos.）的智能聚合物材料意义重大，但极具挑战性。在这项工作中，通过钯催化的碳氮偶联反应，将二苯并噻吩和二苯砜分别连接到9 H-二苯并[ a , c ]咔唑的氮原子上，合成了两种新型有机发光体BCzS和BCzSF。随后，将它们作为客体化合物分别掺杂到双酚A二缩水甘油醚和1, 3-丙二胺的混合物中，然后原位聚合生产掺杂环氧聚合物（EP）薄膜BCzS-EP和BCzSF-EP。结果发现，所得聚合物薄膜表现出高Φ _phos。和τ_磷。其值分别高达13.5%和3.01 s，在环境条件下可以产生明显的绿色有机余辉，持续时间超过20 s。此外，BCzS-EP和BCzSF-EP薄膜表现出可控和可逆的光活化UOP特性，其中它们的有机余辉可以在光和热的刺激下轻松打开和关闭。由于具有独特的光物理特性以及优异的柔韧性和透明度，BCzSF-EP薄膜成功用于可擦光印刷。该工作为同时开发高Φ磷的智能柔性高分子材料提供了新的方向_。和τ_磷。价值观。

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Controlling the efficient and ultralong room-temperature phosphorescence of 9H-dibenzo[a,c]carbazole derivatives for erasable light printing

The development of intelligent polymer materials with high phosphorescence quantum yields (Φ_phos.) and ultralong phosphorescence lifetimes (τ_phos.) simultaneously under ambient conditions is significant but very challenging. In this work, two new organic luminogens, namely BCzS and BCzSF, were synthesized by attaching dibenzothiophene and diphenyl sulfone to the nitrogen atom of 9H-dibenzo[a,c]carbazole via a palladium-catalyzed carbon-nitrogen coupling reaction, respectively. Subsequently, they were employed as guest compounds and doped into the mixtures of bisphenol A diglycidyl ether and 1, 3-propylenediamine, respectively, followed by an in situ polymerization to produce doped epoxy polymer (EP) films BCzS-EP and BCzSF-EP. It was found that the resulting polymer films showed high Φ_phos. and τ_phos. values of up to 13.5% and 3.01 s, respectively, and could produce conspicuous green organic afterglow with a duration time of over 20 s under ambient conditions. Moreover, the BCzS-EP and BCzSF-EP films exhibited controllable and reversible photoactivated UOP properties, in which their organic afterglow could be facilely turned on and off by the stimuli of light and heat. Given the unique photophysical properties and excellent flexibility and transparency, the BCzSF-EP film was successfully used for erasable light printing. This work provides a new direction for developing intelligent and flexible polymer materials simultaneously with high Φ_phos. and τ_phos. values.

更新日期：2023-09-13

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