Incompletely-Condensed Fluorinated Silsesquioxane: Synthesis and Crystal Structure

Abstract

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% yield). The structure was confirmed with 29Si NMR, elemental analysis, and Xray 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 based compounds and polymers.

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Document Details

Document Type
Technical Report
Publication Date
Nov 29, 2011
Accession Number
ADA555880

Entities

People

  • Joseph M Mabry
  • Sean M. Ramirez
  • Timothy S. Haddad
  • Yvonne J. Diaz

Organizations

  • Air Force Research Laboratory

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Air Force
  • Air Force Research Laboratories
  • Boundaries
  • Crystal Structure
  • Crystals
  • Department Of Defense
  • Diffraction
  • Elements
  • Information Operations
  • Military Research
  • Surface Energy
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Chemistry

Readers

  • Materials Science and Engineering.
  • Polymer Science and Engineering.
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