AbstractPolyhedral oligomeric silsesquioxane (POSS) is an important building block for constructing organic-inorganic hybrid molecules or polymers. In this work, we report amphiphilic, incompletely condensed POSSs (IC-POSSs) possessing various substituents on the seven silicon atoms and two kinds of poly(ethylene glycol)s (PEGs) with different chain lengths. The IC-POSS cores possessed comparable thermal stability to that of the completely condensed POSS (CC-POSS) analogs, despite their open cage structure. The amphiphilic IC-POSSs formed micelles of different sizes and had polydispersity indices (PDIs) that were dependent on the substituents and the PEG chain length. Additionally, the lower critical solution temperatures (LCSTs) were observed for amphiphilic IC-POSSs possessing shorter PEG chains, while aqueous solutions of those with longer PEG chains showed high transmittance even at 80 °C.Amphiphilic incompletely condensed polyhedral oligomeric silsesquioxanes possessing various substituents and poly(ethylene glycol)s of different chain lengths have been developed. It has been elucidated that their self-association behaviors in water are dependent on the substituents and chain lengths of poly(ethylene glycol)s. Precise molecular design, excellent thermal stability, and good dispersibility have been realized at once.

中文翻译：

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基于不完全缩合笼型倍半硅氧烷和聚乙二醇的两亲分子的自缔合行为

摘要 多面体低聚倍半硅氧烷 (POSS) 是构建有机-无机杂化分子或聚合物的重要组成部分。在这项工作中，我们报告了在七个硅原子上具有各种取代基的两亲性不完全缩合 POSS（IC-POSS）和两种不同链长的聚（乙二醇）（PEG）。尽管 IC-POSS 核具有开放的笼状结构，但其热稳定性与完全凝聚的 POSS (CC-POSS) 类似物相当。两亲性 IC-POSS 形成不同大小的胶束，并具有取决于取代基和 PEG 链长的多分散指数 (PDI)。此外，对于具有较短 PEG 链的两亲 IC-POSS，观察到较低的临界溶解温度 (LCST)，而那些具有较长 PEG 链的水溶液即使在 80 °C 下也显示出高透光率。 已经开发出具有各种取代基的两亲性不完全缩合多面体低聚倍半硅氧烷和不同链长的聚（乙二醇）。已经阐明它们在水中的自缔合行为取决于聚（乙二醇）的取代基和链长。精确的分子设计、优异的热稳定性和良好的分散性一下子实现了。已经阐明它们在水中的自缔合行为取决于聚（乙二醇）的取代基和链长。精确的分子设计、优异的热稳定性和良好的分散性一下子实现了。已经阐明它们在水中的自缔合行为取决于聚（乙二醇）的取代基和链长。精确的分子设计、优异的热稳定性和良好的分散性一下子实现了。