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词汇 Silsesquioxane
分类 英语词汇 英语翻译词典
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Silsesquioxane

英语百科

Silsesquioxane

A cubic silsesquioxane.
Reaction of OAS-POSS-Cl with CF3SO3H in DMSO. B-E constitute intermediates isolated during A → F cage-rearrangement.
Poly(phenylsilsesquioxane) does not adopt a cage structure, but is a polymer with a ladder-like repeating unit.
Partially condensed silsesquioxane.

A silsesquioxane is an organosilicon compound with the chemical formula [RSiO3/2]n (R = H, alkyl, aryl or alkoxyl). Silsesquioxanes are colorless solids that adopt cage-like or polymeric structures with Si-O-Si linkages and tetrahedral Si vertices. Silsesquioxanes are members of polyoctahedral silsesquioxanes ("POSS"), which have attracted attention as precursors to ceramic materials and nanocomposites. Diverse substituents (R) can be attached to the Si centers. The molecules are unusual because they feature an inorganic silicate core and an organic exterior. The silica core confers rigidity and thermal stability.

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