Corner- and Side-Opened Cage Silsesquioxanes: Structural Effects on the Materials Properties
Corner- and Side-Opened Cage Silsesquioxanes: Structural Effects on the Materials Properties
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DOI：
10.1002/ejic.201901182
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发表时间：
2020-02-11
影响因子：
2.3
通讯作者：
Naka, Kensuke
中科院分区：
文献类型：
--
作者：
Imoto, Hiroaki;Ueda, Yukiho;Naka, Kensuke
开笼型倍半硅氧烷是传统的闭笼型倍半硅氧烷部分水解而成的，是一类很有前途的用于构建有机-无机杂化物的结构单元。它具有高的热稳定性，低结晶度，透明性，可设计性等优点，虽然闭笼型倍半硅氧烷的结构效应已详细阐明到目前为止，那些开放的笼从来没有被研究。本文中，我们合成了在开放部分具有咔唑单元的开角和侧开笼型倍半硅氧烷。前者在固态和聚合物基体中为非晶态，而后者形成晶态结构。这些不同的填充结构导致作为有机发光器件的发光层的性能的显著差异。
Open-cage silsesquioxane, in which traditional closed-cage silsesquioxane is partially hydrolyzed, is a promising class of building blocks for constructing organic-inorganic hybrids. It has advantages of high thermal stability, low crystallinity, transparency, designability, etc. Although the structural effects of closed-cage silsesquioxanes have been elucidated in detail so far, those of open-cages have never been studied. Herein, we synthesized corner- and side-opened cage silsesquioxanes having carbazole units at the open moieties. The former was amorphous in the solid state and polymer matrix, while the latter formed crystalline structures. These different packing structures caused significant difference in the performance as an emission layer of organic light emitting device.