Title: The effect of water on the functionalization of mesoporous silica with 3-aminopropyltriethoxysilane
Authors : Gartmann, Nando
Schütze, Christina
Ritter, Hanna
Brühwiler, Dominik
Published in : The Journal of Physical Chemistry Letters
Volume(Issue) : 1
Issue : 1
Pages : 379
Pages to: 382
Publisher / Ed. Institution : American Chemical Society
Issue Date: 2010
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : ICBC; Mesopores; Functionalization
Subject (DDC) : 540: Chemistry
Abstract: The effect of water on the reaction of 3-aminopropyltriethoxysilane (APTES) with mesoporous silica is investigated on two model systems. A MCM-41-type material with a well-defined pore size is used to investigate changes in the pore size distribution upon reaction with APTES in toluene containing various amounts of water. It is found that, with increasing amount of water, clustering of APTES occurs, leading to a nonuniform distribution of the grafted amino groups and a scarcely functionalized pore body. A second model system with defined particle morphology and one-dimensional channels is employed to visualize the distribution of the grafted amino groups by fluorescent labeling and confocal laser scanning microscopy. The combination of nitrogen sorption and confocal laser scanning microscopy provides valuable insights concerning the role of trace water in the functionalization of mesoporous silica with alkoxysilanes.
Departement: Life Sciences und Facility Management
Organisational Unit: Institute of Chemistry and Biotechnology (ICBT)
Publication type: Article in scientific Journal
DOI : 10.1021/jz9002795
ISSN: 1948-7185
URI: https://digitalcollection.zhaw.ch/handle/11475/2931
Appears in Collections:Publikationen Life Sciences und Facility Management

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