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Boosting Organic Afterglow Performance via a Two-Component Design Strategy Extracted from Macromolecular Self-Assembly
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2022-06-02 , DOI: 10.1021/acs.jpclett.2c00861
Dahua Li 1 , Minjian Wu 2 , Xuefeng Chen 2 , Jiahui Liu 2 , Yan Sun 2 , Ju Huang 2 , Yunlong Zou 2 , Xuepu Wang 2 , Daoyong Chen 1 , Kaka Zhang 2
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2022-06-02 , DOI: 10.1021/acs.jpclett.2c00861
Dahua Li 1 , Minjian Wu 2 , Xuefeng Chen 2 , Jiahui Liu 2 , Yan Sun 2 , Ju Huang 2 , Yunlong Zou 2 , Xuepu Wang 2 , Daoyong Chen 1 , Kaka Zhang 2
Affiliation
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Because intersystem crossing and phosphorescence decay are spin-forbidden in organic systems, it is challenging to obtain high-performance organic afterglow materials. Inspired by two-component design strategy from macromolecular self-assembly, here we report the utilization of synthetic polymers to control the excited state properties of difluoroboron β-diketonate (BF2bdk) and deuterated BF2bdk compounds for the fabrication of room-temperature organic afterglow materials. The polymer component can interact with BF2bdk excited states by dipole–dipole interactions, lower BF2bdk S1 levels with insignificant effect on T1 levels, reduce ΔEST, and thus enhance intersystem crossing of BF2bdk excited states. The polymer component can also suppress intramolecular motion of BF2bdk triplets and protect BF2bdk triplets from oxygen quenching. The obtained BF2bdk-polymer afterglow materials exhibit emission lifetimes up to 2.2 s and high photoluminescence quantum yields under ambient conditions, display excellent processability and flexibility, and can function as efficient donors for excited state energy transfer to construct red afterglow materials.
中文翻译：
通过从大分子自组装中提取的双组分设计策略提高有机余辉性能
由于系统间交叉和磷光衰减在有机系统中是自旋禁止的，因此获得高性能有机余辉材料具有挑战性。受大分子自组装的双组分设计策略的启发，我们在此报告了利用合成聚合物来控制二氟硼 β-二酮酸酯 (BF 2 bdk) 和氘代 BF 2 bdk 化合物的激发态性质，以制备室温有机余辉材料。聚合物组分可以通过偶极-偶极相互作用与BF 2 bdk激发态相互作用，降低BF 2 bdk S 1水平，对T 1水平影响不显着，降低ΔE ST, 从而增强 BF 2 bdk 激发态的系间交叉。该聚合物组分还可以抑制BF 2 bdk 三联体的分子内运动并保护BF 2 bdk 三联体免受氧猝灭。所获得的BF 2 bdk-聚合物余辉材料在环境条件下表现出高达2.2 s的发射寿命和高光致发光量子产率，表现出优异的可加工性和柔韧性，可作为激发态能量转移的有效供体来构建红色余辉材料。
更新日期：2022-06-02
中文翻译：
通过从大分子自组装中提取的双组分设计策略提高有机余辉性能
由于系统间交叉和磷光衰减在有机系统中是自旋禁止的，因此获得高性能有机余辉材料具有挑战性。受大分子自组装的双组分设计策略的启发，我们在此报告了利用合成聚合物来控制二氟硼 β-二酮酸酯 (BF 2 bdk) 和氘代 BF 2 bdk 化合物的激发态性质，以制备室温有机余辉材料。聚合物组分可以通过偶极-偶极相互作用与BF 2 bdk激发态相互作用，降低BF 2 bdk S 1水平，对T 1水平影响不显着，降低ΔE ST, 从而增强 BF 2 bdk 激发态的系间交叉。该聚合物组分还可以抑制BF 2 bdk 三联体的分子内运动并保护BF 2 bdk 三联体免受氧猝灭。所获得的BF 2 bdk-聚合物余辉材料在环境条件下表现出高达2.2 s的发射寿命和高光致发光量子产率，表现出优异的可加工性和柔韧性，可作为激发态能量转移的有效供体来构建红色余辉材料。
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