NDLI: Gallium-containing polymer brush film as efficient supported Lewis acid catalyst in a glass microreactor

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Gallium-containing polymer brush film as efficient supported Lewis acid catalyst in a glass microreactor

Content Provider	Directory of Open Access Journals (DOAJ)
Author	Uwe Karst Rajesh Munirathinam Jurriaan Huskens Roberto Ricciardi Richard J. M. Egberink Willem Verboom Michael Holtkamp Herbert Wormeester
Abstract	Polystyrene sulfonate polymer brushes, grown on the interior of the microchannels in a microreactor, have been used for the anchoring of gallium as a Lewis acid catalyst. Initially, gallium-containing polymer brushes were grown on a flat silicon oxide surface and were characterized by FTIR, ellipsometry, and X-ray photoelectron spectroscopy (XPS). XPS revealed the presence of one gallium per 2–3 styrene sulfonate groups of the polymer brushes. The catalytic activity of the Lewis acid-functionalized brushes in a microreactor was demonstrated for the dehydration of oximes, using cinnamaldehyde oxime as a model substrate, and for the formation of oxazoles by ring closure of ortho-hydroxy oximes. The catalytic activity of the microreactor could be maintained by periodic reactivation by treatment with GaCl3.
Related Links	https://doi.org/10.3762/bjoc.9.194
e-ISSN	18605397
DOI	10.3762/bjoc.9.194
Journal	Beilstein Journal of Organic Chemistry
Issue Number	1
Volume Number	9
Language	English
Publisher	Beilstein-Institut
Publisher Date	2013-01-01
Publisher Place	Germany
Access Restriction	Open
Subject Keyword	Science Organic Chemistry Dehydration of Oximes Flow Chemistry Gallium Microreactors Lewis Acid Catalysis Polymer Brushes
Content Type	Text
Resource Type	Article

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