Investigation of sol-gel supported palladium catalysts for Heck coupling reactions in o/w-microemulsions

I. Volovych; Y. Kasaka; M. Schwarze; Z. Nairoukh; J. Blum; M. Fanun; D. Avnir; R. Schomäcker

doi:10.1016/j.molcata.2014.06.016

Investigation of sol-gel supported palladium catalysts for Heck coupling reactions in o/w-microemulsions

I. Volovych, Y. Kasaka, M. Schwarze^*, Z. Nairoukh, J. Blum, M. Fanun, D. Avnir, R. Schomäcker

^*Corresponding author for this work

Institute of Chemistry

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Sol-gel supported palladium catalysts are investigated for the Heck coupling reaction between styrene and iodo-/bromobenzene to trans-stilbenes in o/w-microemulsions as alternative reaction medium. High conversions and selectivities are obtained with these catalysts and they show better catalytic performance than their commercial analogs Pd@SiO₂ or Pd/C. The influence of the catalyst structure on the activity is investigated in detail showing mass transport limitations that can be optimized by the palladium loading. The catalyst is recyclable >6 times with negligible palladium leaching into the solution. Because of the good recyclability under retention of activity and selectivity, the influence of transport limitations is suppressed and the total catalyst efficiency is increased to more than 2.

Original language	English
Pages (from-to)	210-221
Number of pages	12
Journal	Journal of Molecular Catalysis A: Chemical
Volume	393
DOIs	https://doi.org/10.1016/j.molcata.2014.06.016
State	Published - 1 Nov 2014

Bibliographical note

Funding Information:
We gratefully acknowledge the financial support of this study by Deutsche Forschungsgemeinschaft (DFG) through grant SCHO687/8-2 .

Keywords

Heck coupling
Microemulsion
Palladium acetate
Sol-gel method
Trans-stilbene

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10.1016/j.molcata.2014.06.016

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title = "Investigation of sol-gel supported palladium catalysts for Heck coupling reactions in o/w-microemulsions",

abstract = "Sol-gel supported palladium catalysts are investigated for the Heck coupling reaction between styrene and iodo-/bromobenzene to trans-stilbenes in o/w-microemulsions as alternative reaction medium. High conversions and selectivities are obtained with these catalysts and they show better catalytic performance than their commercial analogs Pd@SiO2 or Pd/C. The influence of the catalyst structure on the activity is investigated in detail showing mass transport limitations that can be optimized by the palladium loading. The catalyst is recyclable >6 times with negligible palladium leaching into the solution. Because of the good recyclability under retention of activity and selectivity, the influence of transport limitations is suppressed and the total catalyst efficiency is increased to more than 2.",

keywords = "Heck coupling, Microemulsion, Palladium acetate, Sol-gel method, Trans-stilbene",

author = "I. Volovych and Y. Kasaka and M. Schwarze and Z. Nairoukh and J. Blum and M. Fanun and D. Avnir and R. Schom{\"a}cker",

note = "Funding Information: We gratefully acknowledge the financial support of this study by Deutsche Forschungsgemeinschaft (DFG) through grant SCHO687/8-2 . ",

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doi = "10.1016/j.molcata.2014.06.016",

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T1 - Investigation of sol-gel supported palladium catalysts for Heck coupling reactions in o/w-microemulsions

AU - Volovych, I.

AU - Kasaka, Y.

AU - Schwarze, M.

AU - Nairoukh, Z.

AU - Blum, J.

AU - Fanun, M.

AU - Avnir, D.

AU - Schomäcker, R.

N1 - Funding Information: We gratefully acknowledge the financial support of this study by Deutsche Forschungsgemeinschaft (DFG) through grant SCHO687/8-2 .

PY - 2014/11/1

Y1 - 2014/11/1

N2 - Sol-gel supported palladium catalysts are investigated for the Heck coupling reaction between styrene and iodo-/bromobenzene to trans-stilbenes in o/w-microemulsions as alternative reaction medium. High conversions and selectivities are obtained with these catalysts and they show better catalytic performance than their commercial analogs Pd@SiO2 or Pd/C. The influence of the catalyst structure on the activity is investigated in detail showing mass transport limitations that can be optimized by the palladium loading. The catalyst is recyclable >6 times with negligible palladium leaching into the solution. Because of the good recyclability under retention of activity and selectivity, the influence of transport limitations is suppressed and the total catalyst efficiency is increased to more than 2.

AB - Sol-gel supported palladium catalysts are investigated for the Heck coupling reaction between styrene and iodo-/bromobenzene to trans-stilbenes in o/w-microemulsions as alternative reaction medium. High conversions and selectivities are obtained with these catalysts and they show better catalytic performance than their commercial analogs Pd@SiO2 or Pd/C. The influence of the catalyst structure on the activity is investigated in detail showing mass transport limitations that can be optimized by the palladium loading. The catalyst is recyclable >6 times with negligible palladium leaching into the solution. Because of the good recyclability under retention of activity and selectivity, the influence of transport limitations is suppressed and the total catalyst efficiency is increased to more than 2.

KW - Heck coupling

KW - Microemulsion

KW - Palladium acetate

KW - Sol-gel method

KW - Trans-stilbene

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SN - 1381-1169

VL - 393

SP - 210

EP - 221

JO - Journal of Molecular Catalysis A: Chemical

JF - Journal of Molecular Catalysis A: Chemical

ER -

Investigation of sol-gel supported palladium catalysts for Heck coupling reactions in o/w-microemulsions

Abstract

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Keywords

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