Formation of metal-containing nanoparticles in polymer matrix. Computer simulation of clusterization kinetics during the solid-phase thermal decomposition of metal-containing precursors

Rozenberg, A. S.; Rozenberg, A. A.; Dzardimalieva, G. I.; Pomogailo, A. D.

doi:10.1007/s10595-005-0007-6

Cited by 2 publications

(4 citation statements)

References 5 publications

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“…The thermal co-polymerization of Pd(AAMA) 2 resulted in the pre-catalyst (Scheme 1) characterized by an atomic Pd(II) polymeric network. However, the formation of primary Pd NPs could also occur, albeit in low extent, during the thermal decomposition of metal-containing precursors, in accordance with the simulated process proposed by Rozenberg et al [30].…”

Section: Resultssupporting

confidence: 87%

“…Once more, no contamination from other elements was recorded. Pd reduction was both thermal (being the reaction temperature 100 °C) [30] and chemical (being the excess of phenylboronic acid the reductant).…”

Section: Resultsmentioning

confidence: 99%

“…In this procedure, the preparation of the suitable Pd organometallic monomer to be linked with co-monomer units is critical, and a second reduction treatment was necessary. A reduced number of monomers could be easily bonded to Pd ion ligands, but when the ligands themselves could reticulate in a stable polymer, the preparation of the Pd NP catalyst was successful [28,29,30,31,32]. The convenience of NP formation concurrent with monomer reticulation has undoubtedly important implications as far as the process sustainability is concerned; the choice of cross-linking ligands is an additional step forward, but the lowest environmental impact in the catalytic process can be reached when water substitutes for the organic solvent as reaction medium.…”

Section: Introductionmentioning

confidence: 99%

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Resin-Immobilized Palladium Nanoparticle Catalysts for Organic Reactions in Aqueous Media: Morphological Aspects

et al. 2015

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An insight into the nano-and micro-structural morphology of a polymer supported Pd catalyst employed in different catalytic reactions under green conditions is reported. The pre-catalyst was obtained by copolymerization of the metal-containing monomer Pd(AAEMA)2 [AAEMA − = deprotonated form of 2-(acetoacetoxy) ethyl methacrylate] with ethyl methacrylate as co-monomer, and ethylene glycol dimethacrylate as cross-linker. This material was used in water for the Suzuki-Miyaura cross-coupling of aryl bromides, and for the reduction of nitroarenes and quinolines using NaBH4 or H2, as reductants. TEM analyses showed that in all cases the pristine Pd(II) species were reduced in situ to Pd(0), which formed metal nanoparticles (NPs, the real active species). The dependence of their average size (2-10 nm) and morphology on different parameters (temperature, reducing agent, presence of a phase transfer agent) is discussed. TEM and micro-IR analyses showed that the polymeric support retained its porosity and stability for several catalytic cycles in all reactions and Pd NPs did not aggregate after reuse. The metal nanoparticle distribution throughout the polymer matrix after several recycles provided precious information about OPEN ACCESSMolecules 2015, 20 18662 the catalytic mechanism, which was truly heterogeneous in the hydrogenation reactions and of the so-called "release and catch" type in the Suzuki coupling.

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Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Resin-Immobilized Palladium Nanoparticle Catalysts for Organic Reactions in Aqueous Media: Morphological Aspects

et al. 2015

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“…I N RECENT YEARS, a great deal of attention has been paid to various approaches to producing metal-polymer nanocomposites containing ultrafine particles of metals or their compounds in polymer matrices through polymer synthesis [1,2]. The development of effective processes for the fabrication of high-temperature composites based on refractory compounds, such as hafnium (Hf) oxides and carbides, is of considerable interest for the preparation of thermally stable, high-strength coatings.…”

Section: Introductionmentioning

confidence: 99%

Hafnium-containing Nanocomposites

Pomogailo

Джардималиева²,

Rozenberg

et al. 2007

Journal of Thermoplastic Composite Materials

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Hafnium-containing nanocomposites are prepared using polymermediated synthesis and controlled thermolysis. The new types of Hf-containing monomers and polymers were synthesized. The composition and structure of the synthesized hafnium-containing precursors and thermolysis products are determined by elemental analysis, IR spectroscopy, mass spectrometry, optical and scanning electron microscopies, and x-ray diffraction. Thermodynamic analysis is used to assess the equilibrium composition of the Hf-C-H-O system and establish the conditions under which HfC and HfO 2 are formed.

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Formation of metal-containing nanoparticles in polymer matrix. Computer simulation of clusterization kinetics during the solid-phase thermal decomposition of metal-containing precursors

Cited by 2 publications

References 5 publications

Resin-Immobilized Palladium Nanoparticle Catalysts for Organic Reactions in Aqueous Media: Morphological Aspects

Resin-Immobilized Palladium Nanoparticle Catalysts for Organic Reactions in Aqueous Media: Morphological Aspects

Hafnium-containing Nanocomposites

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