Hybrid Porous Microparticles Based on a Single Organosilica Cyclophosphazene Precursor

Porous organosilica microparticles consisting of silane-derived cyclophosphazene bridges were synthesized by a surfactant-mediated sol-gel process. Starting from the substitution of hexachlorocyclotriphosphazene with allylamine, two different precursors were obtained by anchoring three or six alkoxy...

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Bibliographic Details
Published in:International journal of molecular sciences 2020-11, Vol.21 (22), p.8552
Main Authors: Poscher, Vanessa, Pappas, George S, Brüggemann, Oliver, Teasdale, Ian, Salinas, Yolanda
Format: Article
Language:English
Subjects:
Anchoring
Atoms & subatomic particles
Catalysis
cyclophosphazenes
degradability
Ethanol
hybrid materials
Hybrids
Nanoparticles
Nitrogen
Organosilicon Compounds - chemical synthesis
Organosilicon Compounds - chemistry
Particle Size
Phosphorus
Photoaddition
Porosity
porous organosilica microparticles
post-functionalization
Precursors
Sol-gel processes
Spectrum analysis
Substitution reactions
Surfactants
Transmission electron microscopy
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Summary:Porous organosilica microparticles consisting of silane-derived cyclophosphazene bridges were synthesized by a surfactant-mediated sol-gel process. Starting from the substitution of hexachlorocyclotriphosphazene with allylamine, two different precursors were obtained by anchoring three or six alkoxysilane units, via a thiol-ene photoaddition reaction. In both cases, spherical, microparticles (size average of ca. 1000 nm) with large pores were obtained, confirmed by both, scanning and transmission electron microscopy. Particles synthesized using the partially functionalized precursor containing free vinyl groups were further functionalized with a thiol-containing molecule. While most other reported mesoporous organosilica particles are essentially hybrids with tetraethyl orthosilicate (TEOS), a unique feature of these particles is that structural control is achieved by exclusively using organosilane precursors. This allows an increase in the proportion of the co-components and could springboard these novel phosphorus-containing organosilica microparticles for different areas of technology.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms21228552