Synthesis, Self‐assembly, and Fluorescence Application of Bottlebrush Polyfluorene‐g‐Polycaprolactone with Conjugated Backbone and Crystalline Brushes,Macromolecular Rapid Communications

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Synthesis, Self‐assembly, and Fluorescence Application of Bottlebrush Polyfluorene‐g‐Polycaprolactone with Conjugated Backbone and Crystalline Brushes
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2020-12-16 , DOI: 10.1002/marc.202000544
Mi Zhou ₁ , Zejian He ₁ , Yulong Chen ₁ , Liangliang Zhu ₁ , Li Li ₁ , Jie Li ₁

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A series of bottlebrush copolymers with conjugated backbone and crystalline branch chains, polyfluorene‐g‐polycaprolactone (PF‐g‐PCL), are synthesized by combining Suzuki cross‐coupling polymerization and cationic ring‐opening polymerization. The PF‐g‐PCLs are prepared to self‐assembled in solution and thin film. Due to the J‐type aggregation of the polyfluorene main chains, the self‐assembly spherical micelles have been observed. Meanwhile, in film, they exhibited self‐assembly ringed spherulites because of the PF microregions in the bottlebrush copolymer. As a result of the interruption of PCL side chains, the aggregation tendency of PF main chains is weakened. And both the polymer solution and solid can overcome the aggregation‐caused quenching to provide more pronounced fluorescence. Especially, owing to the good processability of the PF‐g‐PCL, as a fluorescent ink for different substrates, they can easily be prepared as high‐brightness fluorescent films that are invisible under ambient light.

中文翻译：

带有共轭骨架和结晶刷的聚芴-g-聚己内酯瓶刷的合成，自组装和荧光应用

通过结合Suzuki交叉偶联聚合和阳离子开环聚合反应，合成了一系列具有共轭主链和结晶支链的洗瓶刷共聚物，即聚芴g聚己内酯（PFg g PCL）。PF- g‐PCL准备在溶液和薄膜中自组装。由于聚芴主链的J型聚集，已观察到自组装球形胶束。同时，在薄膜中，由于洗瓶刷共聚物中的PF微区，它们表现出自组装的环状球晶。由于PCL侧链的中断，PF主链的聚集趋势减弱。聚合物溶液和固体均可克服聚集引起的猝灭，从而提供更明显的荧光。尤其是由于PF‐ g‐ PCL具有良好的可加工性，作为用于不同基材的荧光墨水，可以很容易地将它们制备成在环境光下不可见的高亮度荧光膜。

更新日期：2021-02-18

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