This work describes the first rigorous example of a single-component block copolymer system forming unconventional spherical phases. A library of discrete block polymers with uniform chain length and diverse architectures were modularly prepared through a combination of a step-growth approach and highly efficient coupling reactions. The precise chemical structure eliminates all the molecular defects associated with molar weight, dispersity, and compositional ratio. Complex spherical phases, including the Frank–Kasper phase (A15 and σ) and quasicrystalline phase, were experimentally captured by meticulously tuning the composition and architectures. A phase portrait with unprecedented accuracy was mapped out (up to one monomer resolution), unraveling intriguing details of phase behaviors that have long been compromised by inherent molecular weight distribution. This study serves as a delicate model system to bridge the existing gaps between experimental observations and theoretical assessments and to provide insights into the formation and evolution of the unconventional spherical phases in soft matter systems.

中文翻译：

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具有多种结构的离散嵌段​​共聚物：以一种单体分辨率拆分复杂的球形相。

这项工作描述了形成非常规球形相的单组分嵌段共聚物体系的第一个严格的例子。通过逐步增长方法和高效偶联反应的组合，模块化制备了具有均匀链长和不同结构的离散嵌段​​聚合物库。精确的化学结构消除了与分子量，分散度和组成比有关的所有分子缺陷。复杂的球形相，包括Frank-Kasper相（A15和σ）和准晶相，是通过精心调整组成和结构来实验捕获的。绘制出了前所未有的精度的相像（高达一个单体分辨率），揭示长期以来一直被固有分子量分布所损害的相行为的有趣细节。这项研究是一个精致的模型系统，可以弥合实验观察和理论评估之间的现有差距，并为软物质系统中非常规球形相的形成和演化提供见解。