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Oxidations with bonded salen-catalysts in microcapillaries

Chiral vanadium(IV)-salen complexes with variable spacer length were immobilized on polysiloxanes, which were used as catalytically active stationary phase in on-column reaction gas chromatography, on-column reaction electrophoresis, in flow-through reactors and as coating of laboratory glassware. T...

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Hauptverfasser: Sandel, Simone (VerfasserIn) , Weber, Sven K. (VerfasserIn) , Trapp, Oliver (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 2012
In: Chemical engineering science
Year: 2011, Jahrgang: 83, Pages: 171-179
ISSN:1873-4405
DOI:10.1016/j.ces.2011.10.034
Online-Zugang:Verlag, Volltext: http://dx.doi.org/10.1016/j.ces.2011.10.034
Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0009250911007391
Volltext
Verfasserangaben:Simone Sandel, Sven K. Weber, Oliver Trapp

MARC

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520 |a Chiral vanadium(IV)-salen complexes with variable spacer length were immobilized on polysiloxanes, which were used as catalytically active stationary phase in on-column reaction gas chromatography, on-column reaction electrophoresis, in flow-through reactors and as coating of laboratory glassware. These devices modified with the catalytically active stationary phase were employed in asymmetric sulfoxidations using hydrogen peroxide as the oxidant. The here presented approach combines catalysis and chromatographic analysis in a single step and allows to study the kinetics of reactions and to optimize reaction conditions. The initial reaction kinetics and enantioselectivity of the sulfoxidation of benzylphenylsulfide was studied in dependency of the spacer length of the immobilized salen ligand. A drastic influence of the spacer length on the enantioselectivity in the here investigated sulfoxidation was measured. 
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650 4 |a Catalysis 
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650 4 |a On-column reaction chromatography 
650 4 |a Reaction kinetics 
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