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Issue 26, 2008
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Sequential transformations of organic nitrogen functionalities in periodic mesoporous silica

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Abstract

New methods for the sequential organic functionalisation of periodic mesoporous silica materials have been established. In a first step, organic-inorganic hybrid materials were synthesized by direct substitution at the silicon atoms of the channel structure with metalorganic reagents such as lithiated aromatics. The resulting nitrogen-containing nanostructured hybrid materials were subsequently converted in a second step by reactions such as azo-coupling and the Meerwein–Schuster reaction, respectively. These efficient and economic reactions lead to the formation of complex organic-inorganic hybrid materials with new functionalities, including quaternized ammonium salts, aromatic imines and peptides, as well as azo-compounds and stilbenes. The new nanostructured materials were characterized with a comprehensive set of structural and spectroscopic methods, including X-ray diffraction, thermoanalysis, nitrogen sorption, as well as Raman, IR, UV-vis and solid-state NMR spectroscopy.

Graphical abstract: Sequential transformations of organic nitrogen functionalities in periodic mesoporous silica

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Article information


Submitted
07 Nov 2007
Accepted
11 Feb 2008
First published
01 May 2008

J. Mater. Chem., 2008,18, 3103-3108
Article type
Paper

Sequential transformations of organic nitrogen functionalities in periodic mesoporous silica

S. Angloher, J. Kecht and T. Bein, J. Mater. Chem., 2008, 18, 3103
DOI: 10.1039/B717221D

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