Selected POSS
Polyhedral oligosilsesquioxanes comprise a group of nanometer-scaled organosilicon compounds with well-defined and highly symmetrical structures. These compounds em-body the hybrid organic-inorganic architectures, with inner inorganic frameworks con-sisting of silicon and oxygen atoms surrounded by organic substituents in three-dimensional arrangements. With diameters between 1 and 3 nm, polyhedral silsesquiox-anes can be considered the smallest possible particles of silica with surface organic groups. The properties of these hybrid compounds are combinations of those of the two components, making them really nanocomposite materials.
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