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Platinum complex catalysts immobilized on epoxy resins cured with polythiourethane hardeners

100%
Strzelec K., Bączek N.
Open Chemistry
|
2015
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vol. 13
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issue 1
EN
Some efficient polymer-supported platinum catalysts have been synthesized through the novel application of epoxy resin D.E.R.TM332 cured with polythiourethanes. Epoxide supports were obtained as a result of the use of polythiourethane hardeners. The activity, stability and selectivity during long-term use of the investigated catalytic systems were tested in a hydrogenation reaction of cinnamaldehyde. The results of this study indicate that polythiourethanes used to cure epoxy resin can also greatly affect the catalytic properties of the epoxide-supported platinum catalysts. To fully characterize both polymeric supports and heterogenized catalysts numerous research methods like time-of-flight secondary ion mass spectrometry (ToF-SIMS), infrared spectroscopy (IR), X-Ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM-EDX) and nitrogen BET surface area measurements were used.
2
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Magnetic recykling of complex catalysts immobilized on thiol-functionalized polymer supports

81%
Bączek N., Strzelec K., Wąsikowska K.
Polish Journal of Chemical Technology
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2013
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vol. 15
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issue 3
65-68
EN
In this work, the application of the thiol-functionalized epoxy resin encapsulated on magnetic core as supports for palladium catalysts is reported. The study focuses on obtaining of heterogeneous catalysts which can be separated by magnetic field. Palladium complex catalyst [PdCl2(PhCN)2] has been heterogenized by anchoring to these supports via ligand exchange reaction. The characterization of polymeric supports and heterogenized palladium catalysts has involved research methods like time-of-flight secondary ion mass spectrometry (TOF-SIMS), scanning electron microscopy (SEM) and nitrogen BET surface area measurements. The activity and stability during long-term use of the investigated catalytic systems were tested in a Heck and hydrogenation reaction. The influence of the type of thiols used as epoxy hardeners and the morphology of the supports on the catalytic properties of epoxy-supported palladium catalysts was discussed.
3
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Hydrogenation of cinnamaldehyde over supported palladium catalysts

61%
Wąsikowska K., Dmowska P., Bączek N., Strzelec K., Pernak J., Markiewicz B.
Polish Journal of Chemical Technology
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2013
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vol. 15
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issue 4
28-32
EN
The selective hydrogenation of cinnamaldehyde has been studied using palladium catalysts based on epoxy resin cured with ionic liquids. Characterization of palladium catalysts has involved the following methods: IR spectroscopy, X-ray photoelectron spectroscopy (XPS), AAS spectroscopy and time-of-flight secondary ion mass spectrometry (TOF-SIMS). The investigated catalysts showed high stability and good recycling efficiency what makes them useful for a prolonged use. The factors influencing the selectivity of the supported catalysts were discussed.
4
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Oxidative modification of ovalbumin

61%
Olszowski S., Olszowska E., Stelmaszyńska T., Krawczyk A., Marcinkiewicz J., Bączek N.
Acta Biochimica Polonica
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1996
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vol. 43
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issue 4
661-672
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