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Tailoring of organically-modified silica MCM-41 type materials with dye molecules

Published online by Cambridge University Press:  01 February 2011

Bénédicte Lebeau ,
Christabel E. Fowler  and
Stephen Mann
Bénédicte Lebeau
Affiliation:
Laboratoire de Matériaux Minéraux, ENSCMu, Mulhouse, France
Christabel E. Fowler
Affiliation:
School of Chemistry, University of Bristol, Bristol, United Kingdom.
Stephen Mann
Affiliation:
School of Chemistry, University of Bristol, Bristol, United Kingdom.
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Abstract

Micelle templated co-condensation of tetraethoxysilane and 3-(2,4-dinitrophenylamino)-propyltriethoxysilane was used to covalently attach an organic chromophore into silica materials with MCM-41 architecture. Hexagonally highly-ordered mesoporous dye-functionalized silica materials with various dye contents (up to 43 wt%) were precipitated from alkaline and acidic aqueous solutions containing cetyltrimethylammonium bromide (C16TMAB) surfactant. These materials were obtained in the form of powders, excluding their use in thin film applications, such as required for membrane and optical devices. Therefore, an evaporation-induced self assembly process was used to prepare transparent mesostructured dye-functionalized silica thin films and monoliths. Analogous materials with increased pore channel sizes were fabricated by addition of the micelle swelling agent 1,3,5-trimethylbenzene to the reaction mixture or by replacing C16TMAB surfactant by an amphiphilic triblock copolymer (poly (ethylene oxide)-block-poly (propylene oxide)-block-poly (ethylene oxide)). This synthetic route was also used to produce bimodal mesostructured dye-modified silica materials using both latex spheres and C16TMAB micelles as organic structure-directing agents.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 628: Symposium CC – Hybrid Organic/Inorganic Materials , 2000 , CC4.1
Copyright
Copyright © Materials Research Society 2000

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References

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