A series of acrylic monomers exhibiting bright and tunable thermally activated delayed fluorescence was synthesized based on a D−π–A design with a pyrimidine acceptor and heterocyclic amine donors. Cu(0) reversible deactivation radical polymerization of these monomers in a phenylcarbazole-based host yielded random copolymers with emission quantum yields up to 0.98 in thin films and short delayed fluorescence lifetimes as low as 2.5 μs. In all cases, monomer conversions of >95% were achieved with dispersities as low as 1.14. Kinetic studies of the polymerizations revealed differences in the rates at which host and emitter monomers react, leading to either homogeneous or gradient random copolymers, depending on the nature of the electronic donor moiety. The results indicate a complex interplay between the electronic influence of the donors on the photophysical properties and their steric involvement in polymerization, which may influence their performance in optoelectronic devices.

中文翻译：

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在基于D-π-A嘧啶的丙烯酸聚合物中，蓝色到黄色的热活化延迟荧光具有接近统一的量子产率。

在具有嘧啶受体和杂环胺供体的D-π–A设计的基础上，合成了一系列显示出明亮且可调谐的热激活延迟荧光的丙烯酸单体。这些单体在苯基咔唑基主体中的Cu（0）可逆失活自由基聚合反应生成的无规共聚物，薄膜中的发射量子产率高达0.98，延迟的荧光寿命短至2.5μs。在所有情况下，分散度低至1.14，均可实现> 95％的单体转化率。聚合反应的动力学研究表明，取决于电子给体部分的性质，主体和发射体单体反应的速率存在差异，导致均质或梯度无规共聚物。