Influences of reducing conditions on the state of palladium on polymeric supports

Huang, Shao-Ming; Ho, Bing-Lin

doi:10.1007/bf02068388

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…In contrary, for more active ESR/DODT‐HDI/Pd reused catalyst, we observed greater content of Pd(0) and Pd δ+ valence states, so it can be supposed that microporous matrix od ESR/DODT‐HDI resin plays the role of stabilizers of formed nanoparticles, which are generally considered the catalytic active form in Heck coupling. There are many reports in the literature indicating that the catalysts containing a mixture of valence states of Pd(II), Pd(0), and Pd δ+ alone, are more active than Pd(II) catalysts …”

Section: Resultsmentioning

confidence: 99%

Thiirane resins cured with polythiourethane hardeners as novel supports for metal complex catalysts

Strzelec

Bączek

Szynkowska

et al. 2014

J of Applied Polymer Sci

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The application of thiirane resin cured with polythiourethane (PTU) hardeners as novel and efficient support for palladium complex catalyst is reported. Stability and activity efficiency in Heck reactions were determined. IR and X-ray photoelectron spectroscopy provided information of metal coordination to the polymer matrix. Characterization of polymer supports and palladium catalysts has involved the measurements of the structural parameters in the dry state by the nitrogen BET adsorption, time-of-flight secondary ion mass spectrometry, scanning electron microscopy, and energy dispersive X-ray analysis. The results of this study indicate that PTU used to cure thiirane resin can greatly affect the catalytic properties of the episufide resin-supported palladium catalyst. These new type of polymer supports comparing to other organic carriers offers several practical advantages such as ability to control the crosslinking density, porosity and the chemical structure of the polymeric matrix, which influence the catalytic properties of the immobilized metal complex. V C 2014 Wiley Periodicals, Inc. J.Appl. Polym. Sci. 2014, 131, 40330.

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Section: Resultsmentioning

confidence: 99%

Thiirane resins cured with polythiourethane hardeners as novel supports for metal complex catalysts

Strzelec

Bączek

Szynkowska

et al. 2014

J of Applied Polymer Sci

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Polymer‐supported palladium and platinum species as hydrogenation catalysts

Xavier

Mahadevan

1992

J. Polym. Sci. A Polym. Chem.

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SYNOPSISThe synthesis of new hydrogel copolymers and their use for anchoring Pd and Pt species is described. The supported catalysts are effective for the reduction of alkenes, dienes, alkynes, and nitroaromatics under mild conditions. The catalysts have been characterized by chemical analysis, particle size measurement, IR, TGA, and x-ray photoelectron spectra. Relative reactivities and the effects of substrate structure, solvents, catalyst loading, particle size of the catalysts, and partial pressure of hydrogen have been determined. The kinetics of hydrogenation have been analyzed using concepts useful under slurry reaction conditions. The recycling efficiencies of the catalysts and product analysis to establish selectivities have been assessed. 0 1992 John Wiley & Sons, Inc.

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