Palladium nanoparticles in ionic liquids stabilized by mono-phosphines. Catalytic applications

Authors

  • Gustavo Chacón Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069, Université de Toulouse 3 – Paul Sabatier, 118 route de Narbonne, 31062 Toulouse cedex 9, France. Current address: Institute of Chemistry, Laboratory of Molecular Catalysis UFRGS, Av. Bento Gonçalves, 9500, 91501-970 P.O. Box 15003, Porto Alegre, RS, Brazil.
  • Christian Pradel Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069, Université de Toulouse 3 – Paul Sabatier, 118 route de Narbonne, 31062 Toulouse cedex 9, France.
  • Nathalie Saffon-Merceron Institut de Chimie de Toulouse, FR 2599, Université de Toulouse 3 – Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex 9, France.
  • David Madec Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069, Université de Toulouse 3 – Paul Sabatier, 118 route de Narbonne, 31062 Toulouse cedex 9, France.
  • Montserrat Gomez Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069 Université de Toulouse 3 - Paul Sabatier

DOI:

https://doi.org/10.17721/fujcV4I1P37-50

Keywords:

ionic liquids, palladium nanoparticles, mono-phosphines, C-C cross-coupling, hydrogenation

Abstract

Palladium nanoparticles generated from organometallic complexes in the presence of functionalized mono-phosphines (L1-L3), in both THF and imidazolium-based ionic liquids (ImILs), were successfully synthesized. Depending on the phosphine and solvent nature, PdNPs with different extent of aggregation were observed. Actually, the ligand L1, P(CH2CH2CH2Ph)3, led to small and well-dispersed nanoparticles in both ILs, [BMI][PF6] and [EMI][HP(O)2OMe], in contrast to more agglomerated PdNPs obtained in THF. PdNPs in ILs were catalytically active and chemoselective in C-C cross-coupling (Suzuki-Miyaura and Heck-Mizoroki) and hydrogenation reactions. Well-defined Pd(0) and Pd(II) organometallic complexes containing L1, [PdCl2(L1)2] and [Pd(ma)(L1)2], were also prepared for comparative purposes. 

Supplementary information

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Published

2016-05-31

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Vol. 4 No. 1 (2016): Ionic Liquids: from Neoteric Solvents to New Materials

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