Polyfunctional Cubic Silsesquioxanes as Building Blocks for Organic/Inorganic Hybrids

Richard Laine

R.M. Laine, C. Zhang, A. Sellinger, and L. Viculis (1998)

J. Appl. Organometallic Chem., 12:715-23.

Cubic silsesquioxanes, [RSiO1.5]x, potentially
offer access to organic/inorganic hybrids wherein the exact shape, size and mechanical properties of the inorganic component are perfectly
defined. Furthermore, by tailoring the organic
functionality bound to silicon, the inorganic/
organic interface can also be perfectly defined.
Finally, careful selection of the polymerizable
groups in the organic moieties can provide goodto-excellent control of the crosslinked density or
degree of polymerization of the resulting hybrid
materials. Thus, cubic silsesquioxanes may be
exceptional model materials for inorganic/organic hybrids. Methods of synthesizing cubes
with liquid-crystalline and/or polymerizable
organic moieties are described. Some thermal
properties are discussed. The catalytic copolymerization of the octavinyldimethylsiloxy-functionalized cube with the octahydridodimethylsiloxy-functionalized cube to produce a material
with well-defined microporosity and high surface area is described.


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