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Institut für Polymerchemie |
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Lehrstuhl für Makromolekulare Stoffe und Faserchemie |
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Prof. Dr. Michael R. Buchmeiser
Supported Ionic Liquids and Ionic Catalysts for Continuous Biphasic Reactions |
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We are designing and synthesizing novel ionic Grubbs-type and Schrock-type catalysts
for biphasic metathesis reactions. These specialized catalysts contain ion-containing ligands
and are immobilized in a supported ionic liquid phase (SILP) on monolithic columns for the
preparation of catalyst-free metathesis products in a continuous process [1]. While the products
are eluted, the ion-containing catalysts remain in the ionic liquid phase. Recycling of the columns
is facile and requires simple removal of ionic liquid and dissolved catalyst with solvent.
Future
projects involve the synthesis of various Grubbs-type and Schrock-type catalysts with ion-containing
ligands and the evaluation of their catalytic activity in biphasic, continuous reactions.
The study of the type and the placement of the ionic group as they affect coordination to different
substrates and catalytic activity under various conditions will be evaluated.
Figure 1. A biphasic continuous metathesis reaction using a cationic catalyst dissolved in ionic liquids immobilized on the surface of a monolith
Figure 2. Structure of an ionic Ru-alkylidene complex used for metathesis reactions under SILP conditions [1].
Reference:
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A Dicationic Ruthenium Alkylidene Complex for Continuous Biphasic Metathesis Using Monolith-Supported Ionic Liquids
B. Autenrieth, W. Frey and M. R. Buchmeiser, Chem. Eur. J., in press (2012), DOI: 10.1002/chem.201201199
All research topics
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