The development of complex topologies such as macromolecular cages constitutes a fascinating aspect of polymer chemistry. In the present work, a novel strategy involving self-closing bifunctional end-groups, which under specific conditions, are allowed to assemble themselves into a predefined thermodynamically favored macrostructure, was designed to fulfill the topological conversion of star-shaped polymers to their respective cage-shaped polymers. A series of four different well-defined four-arm star-shaped poly(ε-caprolactone) polymers varying in molar masses were successfully synthesized, end-functionalized, and closed into cage-shaped polymers by formation of [3₄]triazolophane macrocycle units. The obtained cage-shaped polymers feature interesting properties that depend drastically on the chain length of the arms and seem to differ from previous reported polymer cages.

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大环和大分子拓扑结构的协同作用：基于三唑啉的高效 [34] 笼形聚合物合成

大分子笼等复杂拓扑结构的发展构成了聚合物化学的一个迷人方面。在目前的工作中，设计了一种涉及自闭合双功能端基的新策略，该策略在特定条件下被允许组装成预定义的热力学有利的宏观结构，旨在实现星形聚合物到各自笼的拓扑转换。形聚合物。成功合成了一系列四种不同的定义明确的四臂星形聚（ ε-己内酯）聚合物，其摩尔质量不同，末端官能化，并通过形成 [3 ₄]三唑烷大环单元。获得的笼形聚合物具有有趣的特性，这些特性在很大程度上取决于臂的链长，并且似乎与以前报道的聚合物笼不同。