A recently developed sub-class of POSS, fluorinated polyhedral oligomeric silsesquioxane (F-POSS), consists of a Si-O core with a periphery of fluorinated chains ranging from 6-12 carbon atoms in length. These structures possess some of the lowest surface energies for any known crystalline solid. This sub-class has been based on completely-condensed silsesquioxane cages with no means of chemical functionalization. Herein an incompletely-condensed silsesquioxane, (CF3(CF2)7CH2CH2)8Si8O11(OH)2, has been synthesized via a multi-step synthesis (52% overall yield). The structure was confirmed with 29Si NMR, elemental analysis, and X-ray diffraction. X-ray diffraction revealed an incompletely-condensed structure that contains inter- and intramolecular hydrogen bonding between silanols. This structure is currently being functionalized to produce a wide variety of functional F-POSS compounds and polymers.

Incompletely-condensed fluorinated silsesquioxane: Synthesis and crystal structure

243rd National Meeting (2012)

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