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A Highly Efficient and Stable Palladium Catalyst Entrapped within the Cross-Linked Chitosan Membrane for Heck Reactions

Zeng, Minfeng ; Qi, Chenze ; Yang, Jing ; Wang, Baoyi ; Zhang, Xian-Man Zeng, Minfeng (correspondence author)

Industrial & Engineering Chemistry Research, Jun 18, 2014, Vol.53(24), pp.10041-10050-10041-10050 [Peer Reviewed Journal]

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  • Title:
    A Highly Efficient and Stable Palladium Catalyst Entrapped within the Cross-Linked Chitosan Membrane for Heck Reactions
  • Author: Zeng, Minfeng ; Qi, Chenze ; Yang, Jing ; Wang, Baoyi ; Zhang, Xian-Man
  • Zeng, Minfeng (correspondence author)
  • Subjects: Membranes ; Crosslinking ; Cations ; Chitosan ; Networks ; Catalysts ; Stability ; Specific Surface ; Palladium ; Analysis (MD) ; Chemical Analysis (Ep) ; Chemical Analysis (Ed) ; Chemical Analysis (EC)
  • Is Part Of: Industrial & Engineering Chemistry Research, Jun 18, 2014, Vol.53(24), pp.10041-10050-10041-10050
  • Description: In this study, chitosan directly cross-linked by Pd super(II) cation membranes (Pd-cr-CSM) with good mechanical strength and thermal stabilities have been prepared. Although the prepared Pd-cr-CSM has neither open porous structure nor high specific surface areas, it has similar good catalytic activity and much higher stability as compared with typical prepared chitosan-stabilized palladium heterogeneous catalysts for Heck reactions. It is highly active for the Heck reactions of aryl iodides and bromides with a strong electron-withdrawing group at a palladium catalyst loading of 0.15 mol %. It can be recycled 12 times in dimethyl sulfoxide (DMSO) solution or 7 times in aqueous solution. The high activity and extreme stability of the Pd-cr-CSM catalyst are mainly attributed to the well-entrapped palladium nanoparticles inside the chitosan matrix, which might catalyze the coupling reactions in the free volume holes (open spaces) of the swollen cross-linked chitosan gel...
  • Language: English
  • Identifier: ISSN: 0888-5885 ; E-ISSN: 1520-5045 ; DOI: 10.1021/ie501315a

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