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Synthesis of a “Butterfly Cage” Based on a Double‐Decker Silsesquioxane
Author(s) -
Kunthom Rungthip,
Adachi Takuto,
Liu Yujia,
Takeda Nobuhiro,
Unno Masafumi,
Tanaka Ryoji
Publication year - 2019
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201901361
Subject(s) - silsesquioxane , siloxane , cage , materials science , crystal structure , crystallography , polymer chemistry , chemistry , polymer , composite material , mathematics , combinatorics
Novel polyhedral structures were prepared with a butterfly‐shape composed of oligosiloxane wings and a double‐decker silsesquioxane (DDSQ) body. The compounds were synthesized in two steps from commercially available alkoxysilanes, and their structures were confirmed using spectroscopic methods and X‐ray crystallography. Not like other phenyl‐substituted cage silsesquioxanes, these butterfly cages show very good solubility in common organic solvents. The crystal structures clearly showed their unique features: a larger space with longer siloxane chains and a very flexible framework. Moreover, these compounds are thermally stable with a Td 5 (5 % weight loss temperature) over 320 °C.