Journal article
Synthesis of Inorganic and Organic–Inorganic Hybrid Hollow Particles Using a Cationic Surfactant with a Partially Fluorinated Tail
Advanced functional materials, Vol.17(14), pp.2500-2508
09/2007
DOI: 10.1002/adfm.200600635
Abstract
A new partially fluorinated cationic surfactant, 1‐(10‐perfluorooctyldecyl)pyridinium bromide monohydrate, is synthesized and used as the template for mesoporous ceramic and inorganic–organic hybrid particles. Several hydrolyzed alkoxide precursors are shown to co‐assemble with this surfactant to form hollow vesicle‐like particles, and the effect of changing the alkoxide chemical structure on the formation of these particles is examined. Tetramethoxysilane produces cubic or columnar particles without hollow cavities, but all other tetra‐n‐alkoxysilanes tested up to the n‐butoxide produce hollow particles. As the alkoxide length increases, the shell structure changes from multilayered (with Si(OC2H5)4) to a single thin layer (with Si(OC3H7)4) to a single thick layer (with Si(OC4H9)4). The stability of the fluorocarbon bilayers allows similar vesicular structures to be obtained in organic–inorganic hybrids prepared with bridged alkoxysilanes. Ethylene‐bridged silanes display similar structures to tetraalkoxysilanes. However, the hollow structures appear to partially collapse when the bridging chain is too long (octylene) and no hollow particles are formed with bis(trialkoxysilylpropyl)amines.
Unusually ordered porous structures, including hollow multilamellar particles with either silica walls or alkylene‐bridged organosilica walls such as ethylene‐bridged hollow silsesquioxane particles (see figure) are prepared by co‐assembly of the surfactant 1‐(10‐perfluorooctyldecyl)pyridinium bromide and hydrolyzed alkoxysilane precursors.
Details
- Title: Subtitle
- Synthesis of Inorganic and Organic–Inorganic Hybrid Hollow Particles Using a Cationic Surfactant with a Partially Fluorinated Tail
- Creators
- B TanS. M VyasH.‐J LehmlerB. L KnutsonS. E Rankin
- Resource Type
- Journal article
- Publication Details
- Advanced functional materials, Vol.17(14), pp.2500-2508
- DOI
- 10.1002/adfm.200600635
- ISSN
- 1616-301X
- eISSN
- 1616-3028
- Publisher
- WILEY‐VCH Verlag; Weinheim
- Number of pages
- 9
- Grant note
- National Science Foundation (CTS‐0348234; DMR‐0210517)
- Language
- English
- Date published
- 09/2007
- Academic Unit
- Occupational and Environmental Health; Iowa Neuroscience Institute
- Record Identifier
- 9984000922102771
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