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Corner‐ and Side‐Opened Cage Silsesquioxanes: Structural Effects on the Materials Properties
Author(s) -
Imoto Hiroaki,
Ueda Yukiho,
Sato Yuri,
Nakamura Masashi,
Mitamura Koji,
Watase Seiji,
Naka Kensuke
Publication year - 2020
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201901182
Subject(s) - silsesquioxane , chemistry , cage , thermal stability , crystallinity , polymer , amorphous solid , polymer chemistry , chemical engineering , crystallography , organic chemistry , mathematics , combinatorics , engineering
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.