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Materials 2011, 4(6), 1096-1103; doi:10.3390/ma4061096
Article

Correlation of Nitrogen Sorption and Confocal Laser Scanning Microscopy for the Analysis of Amino Group Distributions on Mesoporous Silica

 and
*
Institute of Inorganic Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
* Author to whom correspondence should be addressed.
Received: 18 May 2011 / Revised: 31 May 2011 / Accepted: 1 June 2011 / Published: 9 June 2011
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Abstract

Aminopropylalkoxysilanes are frequently used for the functionalization of mesoporous silica. The analysis of amino group distributions on arrays of silica nanochannels by a combination of nitrogen sorption and confocal laser scanning microscopy provides valuable insight into the mechanisms underlying the interaction of these silanes with mesoporous silica surfaces. Tendencies towards external surface functionalization, non-uniform distribution in the pores, and hydrolysis of the silica framework are shown to depend to a large extent on the mobility of the aminopropylalkoxysilane molecules, which can be adjusted by the number and type of alkoxy groups.
Keywords: mesoporous silica; nanochannels; amines; silanes; distribution; confocal microscopy; nitrogen sorption
mesoporous silica; nanochannels; amines; silanes; distribution; confocal microscopy; nitrogen sorption
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Gartmann, N.; Brühwiler, D. Correlation of Nitrogen Sorption and Confocal Laser Scanning Microscopy for the Analysis of Amino Group Distributions on Mesoporous Silica. Materials 2011, 4, 1096-1103.

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