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Enhancement of Red Thermally Assisted Fluorescence in Bottlebrush Block Copolymers
Macromolecules ( IF 5.1 ) Pub Date : 2021-08-27 , DOI: 10.1021/acs.macromol.1c01524 Alexander M. Polgar 1 , Jade Poisson 1 , Cheyenne J. Christopherson 1 , Zachary M. Hudson 1
Macromolecules ( IF 5.1 ) Pub Date : 2021-08-27 , DOI: 10.1021/acs.macromol.1c01524 Alexander M. Polgar 1 , Jade Poisson 1 , Cheyenne J. Christopherson 1 , Zachary M. Hudson 1
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The morphology of a material used in organic electronics can be equally as important as the functional properties of its components. This is particularly true of polymers, which may be hierarchically constructed to regulate the interface between different functional monomers. Here, we examine four topologically distinct polymers for red thermally assisted fluorescence emission. The polymers consist of thermally activated delayed fluorescence sensitizer and fluorescent acceptor monomers arrayed in (i) linear random, (ii) linear block, (iii) bottlebrush random, or (iv) bottlebrush block polymer architectures. The crucial factor for achieving efficient red thermally assisted fluorescence in the thin film is found to be the separation of sensitizer and acceptor monomers into discrete nanoscale domains, which is best accomplished in the bottlebrush block morphology. This allows for rapid energy transfer from sensitizer to acceptor, while minimizing deleterious emission quenching interactions due to chain entanglement. This work demonstrates that nanosegregation is a viable approach to engineer the donor–acceptor architectures needed for efficient thermally assisted fluorescence.
中文翻译：
瓶刷嵌段共聚物中红色热辅助荧光的增强
用于有机电子产品的材料的形态与其组件的功能特性同样重要。聚合物尤其如此，它可以分层构建以调节不同功能单体之间的界面。在这里，我们检查了四种拓扑不同的聚合物的红色热辅助荧光发射。聚合物由热活化延迟荧光敏化剂和荧光受体单体组成，它们排列在 (i) 线性无规、(ii) 线性嵌段、(iii) 瓶刷随机或 (iv) 瓶刷嵌段聚合物结构中。发现在薄膜中实现有效的红色热辅助荧光的关键因素是将敏化剂和受体单体分离成离散的纳米级域，最好在瓶刷块形态中完成。这允许从敏化剂到受体的快速能量转移，同时最大限度地减少由于链缠结造成的有害发射淬灭相互作用。这项工作表明，纳米隔离是一种可行的方法来设计高效热辅助荧光所需的供体-受体结构。
更新日期：2021-09-14
中文翻译：
瓶刷嵌段共聚物中红色热辅助荧光的增强
用于有机电子产品的材料的形态与其组件的功能特性同样重要。聚合物尤其如此，它可以分层构建以调节不同功能单体之间的界面。在这里，我们检查了四种拓扑不同的聚合物的红色热辅助荧光发射。聚合物由热活化延迟荧光敏化剂和荧光受体单体组成，它们排列在 (i) 线性无规、(ii) 线性嵌段、(iii) 瓶刷随机或 (iv) 瓶刷嵌段聚合物结构中。发现在薄膜中实现有效的红色热辅助荧光的关键因素是将敏化剂和受体单体分离成离散的纳米级域，最好在瓶刷块形态中完成。这允许从敏化剂到受体的快速能量转移，同时最大限度地减少由于链缠结造成的有害发射淬灭相互作用。这项工作表明，纳米隔离是一种可行的方法来设计高效热辅助荧光所需的供体-受体结构。
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