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Distribution of Amino Groups on a Mesoporous Silica Surface after Submonolayer Deposition of Aminopropylsilanes from an Anhydrous Liquid Phase


Salmio, H; Brühwiler, D (2007). Distribution of Amino Groups on a Mesoporous Silica Surface after Submonolayer Deposition of Aminopropylsilanes from an Anhydrous Liquid Phase. Journal of Physical Chemistry C, 111(2):923-929.

Abstract

The reaction of mesoporous silica MCM-41 with various aminopropylsilanes was investigated. The distribution of grafted amino groups after submonolayer deposition from anhydrous toluene was probed by fluorescein labeling in conjunction with photoluminescence spectroscopy and pore size analysis. Monoalkoxysilanes generally distributed more uniformly than monopodal and dipodal trialkoxysilanes. The outcome of the grafting reaction additionally depended on the nature of the amino group. Secondary amines grafted more efficiently than their primary analogues. Further, it could be shown that the polarity of the solvent considerably affects the distribution of the amino groups in the case of strongly interacting aminopropylsilanes.

The reaction of mesoporous silica MCM-41 with various aminopropylsilanes was investigated. The distribution of grafted amino groups after submonolayer deposition from anhydrous toluene was probed by fluorescein labeling in conjunction with photoluminescence spectroscopy and pore size analysis. Monoalkoxysilanes generally distributed more uniformly than monopodal and dipodal trialkoxysilanes. The outcome of the grafting reaction additionally depended on the nature of the amino group. Secondary amines grafted more efficiently than their primary analogues. Further, it could be shown that the polarity of the solvent considerably affects the distribution of the amino groups in the case of strongly interacting aminopropylsilanes.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Language:English
Date:2007
Deposited On:24 Jun 2008 13:20
Last Modified:05 Apr 2016 12:23
Publisher:American Chemical Society
ISSN:1932-7447
Publisher DOI:https://doi.org/10.1021/jp0651440
Permanent URL: https://doi.org/10.5167/uzh-2617

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