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Title: Membrane occluded catalysts: A higher order mimic with improved performance
Authors: Parton, RF ×
Vankelecom, Ivo
Tas, D
Janssen, KBM
Knops-Gerrits, PP
Jacobs, Pierre #
Issue Date: 1996
Publisher: ELSEVIER SCIENCE BV
Series Title: Journal of molecular catalysis. A: Chemical vol:113 issue:1-2 pages:283-292
Abstract: A general method to immobilise homogeneous catalysts and to improve the performance of heterogeneous catalysts is discussed. The method consists in embedding the catalysts in hydrophobic PDMS (polydimethylsiloxane)-membranes. Inspired on a complete structural mimic of cytochrome P-450 up to the level of the membrane, this technique gives superior properties to the membrane resident catalyst. The scope and limitations of this method are discussed by two examples of heterogeneous catalysts, i.e., FePc-Y (iron phthalocyanine zeolite Y) and [Mn(bpy)(2)](2+)-Y (manganese bis(bipyridyl) zeolite Y), and three examples of homogeneous complexes, i.e., FePc, Ru-binap ([2,2'-bis(diphenylphosphino-1,1'-binaphtyl]chloro(p-cymene)-ruthenium chloride) and the Jacobsen catalyst (N,N'-bis(3,5-di-tert-butylsalicylidene) cyclohexane-diamine manganese chloride). Due to changed sorption in the zeolites, catalyst activity is enhanced and deactivation is suppressed. Furthermore, the membrane incorporation makes the use of a solvent redundant. For homogeneous complexes, this procedure represents a general method for heterogenisation. Moreover, the technique opens new ways in the field of oxidation chemistry, where solvents are necessary to homogenise reagents which usually differ in polarity.
ISSN: 1381-1169
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Surface Chemistry and Catalysis
× corresponding author
# (joint) last author

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