Palladium (Pd) nanoparticles were prepared using the phase transfer method and coated with alkylamines as stabilizing agents stably dispersed in nonpolar solvents. Spherical Pd nanoparticles with an average diameter of 4 nm and a relatively narrow size distribution were obtained using hexylamine or dodecylamine, and they were successfully incorporated in microemulsion-based gelatin organogel (OG); also, an OG network containing Pd nanoparticles was prepared via drying. For the Mizoroki–Heck cross-coupling reaction of iodobenzene with methyl acrylate in supercritical carbon dioxide, the Pd nanoparticles in the OG network exhibited much higher reactivity than those in powder state. Preparation conditions of OG (e.g., gelatin concentration) affected the apparent reactivity of the supported Pd nanoparticles. The Pd nanoparticles in the OG network with high gelatin concentration were recycled with no appreciable change of reactivity. In contrast, the reactivity of the Pd nanoparticles with low gelatin concentration decreased during recycling.
‡Presented at the 42nd International Conference of SSCHE, High Tatras, Slovakia, May 25–29, 2015
Acknowledgements.
The authors are grateful to Dr. Takeshi Furuya, Nanosystem Research Institute, AIST, for his support in setting up the scCO2 reactor system. This research was partially supported by a Grant-in-Aid for Scientific Research (C) (No. 21560787) from the JSPS.
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© 2015 Institute of Chemistry, Slovak Academy of Sciences
Artikel in diesem Heft
- Erratum
- Erratum to “Arzugul Muslim, Dilnur Malik, Mehriban Hojiahmat: RAFT polymerization of linear ABC triblock copolymer PtBA-b-PS-b-P2VP and regulation of its hierarchical self-assembly structure in solution”, Chemical Papers 69 (11) 1512-1518 (2015)*
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Artikel in diesem Heft
- Erratum
- Erratum to “Arzugul Muslim, Dilnur Malik, Mehriban Hojiahmat: RAFT polymerization of linear ABC triblock copolymer PtBA-b-PS-b-P2VP and regulation of its hierarchical self-assembly structure in solution”, Chemical Papers 69 (11) 1512-1518 (2015)*
- Original Paper
- Nanoscale lanthanum oxide catalysts for self-condensation of acetone: preparation via self-assembly on anodic aluminum oxide, structure, and properties
- Original Paper
- Measuring the three forms of ellagic acid: suitability of extraction solvents
- Original Paper
- Relationship between acidification factors and methylene blue uptake by Ca-bentonite: optimisation and kinetic study
- Original Paper
- Reactivity of palladium nanoparticles supported on a microemulsion-based organogel network in supercritical carbon dioxide‡
- Original Paper
- Transport of iron ions from chloride solutions using cellulose triacetate matrix inclusion membranes with an ionic liquid carrier‡
- Original Paper
- Effect of active acidic compounds on storage stability of coker naphtha
- Original Paper
- Plant-derived surfactants as an alternative to synthetic surfactants: surface and antioxidant activities
- Original Paper
- Interaction of metallic zirconium and its alloys Zry-2 and E110 with molten eutectic salt of LiF–NaF–KF containing zirconium fluoride components
- Original Paper
- Assessment of two prop-2-enamide-based polyelectrolytes as property enhancers in aqueous bentonite mud
- Original Paper
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- Original Paper
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- Original Paper
- Iron cross-linked carboxymethyl cellulose–gelatin complex coacervate beads for sustained drug delivery