The controlled synthesis of star-shaped bottlebrush polymers with tunable topologies is a challenge. However, such materials may exhibit distinct photoluminescence properties. Bottlebrush polymers have polymerization-induced emission (PIE) properties due to their aggregated side chains, and aggregation-induced emission (AIE) is also a unique luminescent property. In this work, we prepared a variety of highly active alkyne Pd catalysts and polymerized poly(L/D-lactic acid) macromonomers containing polymerizable phenylisocyanide groups as end groups to obtain a variety of topologically structured bottlebrush polymers with controllable molecular weights and narrow molecular weight distributions. Bottlebrush polymers with tetraphenyl ethylene (TPE) units as the core exhibit tunable photoluminescence and circularly polarized luminescence properties. We propose that such properties are due to the unique AIE characteristics of the TPE unit combined with the PIE characteristics of the bottlebrush polymer.

中文翻译：

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螺旋星形 Bottlebrush 聚合物：从受控合成到可调光致发光和圆偏振发光


具有可调拓扑结构的星形瓶刷聚合物的受控合成是一项挑战。然而，此类材料可能表现出不同的光致发光特性。Bottlebrush 聚合物由于其聚集侧链而具有聚合诱导发射 （PIE） 特性，而聚集诱导发射 （AIE） 也是一种独特的发光特性。在这项工作中，我们制备了多种高活性炔烃 Pd 催化剂和含有可聚合苯基异氰化物基团作为端基的聚合聚（L/D-乳酸）大分子单体，以获得多种分子量可控、分子量分布窄的拓扑结构瓶刷聚合物。以四苯乙烯 （TPE） 单元为核心的 Bottlebrush 聚合物表现出可调谐的光致发光和圆偏振发光特性。我们提出，这种特性是由于 TPE 单元独特的 AIE 特性与 bottlebrush 聚合物的 PIE 特性相结合。