Preparation and reactivity of metal-containing monomers

Rozenberg, A. S.; Aleksandrova, E. I.; Джардималиева, Г. И.; Kiryakov, N. P.; Chizhov, P. E.; Petinov, V. I.; Pomogailo, A. D.

doi:10.1007/bf00696917

Cited by 14 publications

(14 citation statements)

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“…The polymer-connected carbonyls (both for Co and Fe) generates the systems with uniformly distributed ferromagnetic particles having 5-10 nm in size and mean surface from 80 to 700 nm 2 per particle. The electron diffraction analysis of such systems [81] have revealed the formation of g-Fe 2 O 3 and FeF 2 particles for initial Fe(CO) 5 and revealed Co, Co 2 O 3 , and CoF 2 for initial Co 2 (CO) 8 . The metal fluoride formation is connected with the reactions involving the polymer chain and is accompanied by the C-F bond splitting: It follows that in such systems the two processes take place simultaneously.…”

Section: )mentioning

confidence: 98%

“…The ferrotricarbonyl complexes having two double nonconjugated bonds are nonstable, and the intermolecular products in such a situation can be formed. A distinctive feature of the process is that the same type of ferrotricarbonyl complexes connected with allylic fragments were identified [66] at the Co 2 (CO) 8 or Fe 3 (CO) 12 interactions with polystyrenepolydiene block-copolymers. For polystyrene the M(CO) 3 fragments connected through the p-complexes with phenyl ring are formed from M(CO) 6 (M = Cr, Mo, W) [67].…”

Section: The Formation Of Metal Sols In Polymers By Thermal Decomposimentioning

confidence: 99%

“…It is of interest that metal carbonyls such as Co 2 (CO) 8 form complexes with polyionic ligands (such as ethynylbensene-Co 2 (CO) 6 ) and can be decomposed explosively [73] at 513 K (generating CH 4 and H 2 ) and at 1070 K (forming multilayer nanotubes). It is possible that a metallized polyione pyrolysis can lead to the single-wall nanotube formation too [74], just as the Fe(CO) 5 pyrolysis (at 1320 K) in the presence of other carbon sources [75].…”

Section: )mentioning

confidence: 99%

“…The most common situation is that nanoparticles, derived in a polar solvent, are forming the complicated complexes with metal carbonyls that are able to react with fluoropolymers. The main factors affecting a selective interaction of Fe(CO) 5 or CO 2 (CO) 8 2-2 -PETF complex formation during adsorption that allows us to perform the kinetic studies of the process as a whole and perform the thermal decomposition in particular. The intermediates thermolysis (413 K, DMF) is a first-order reaction, but these processes' rate constants and activation energies differ essentially (Table 3.9).…”

Section: )mentioning

confidence: 99%

“…Particularly the Fe(CO) 5 thermolysis in a xylol solution (cis-PB or styrene-butadiene copolymer at 408 K, 24 hr, Ar atmosphere) has gone through the successive stages and led to the formation gave rise to the ferrum tricarbonyl(diene) chains [C 8 5 Natural rubber 8% solution 17% Fe 57 dioxanexylol, 398 K Fe(CO) 5 Polystyrene-blockDichlorobenzene, 7-8 5 3 polybutadiene 418 K Fe(CO) 5 Styrene-butadiene Decalin,~6 60 copolymer (5.8 : 1) 423 K Fe(CO) 5 Styrene-4-o-Dichlorobenzene 2% Fe; ~6 61 vinylpyridine copolymer (1 : 0.05) At the thermolysis initial stage a very active Fe(CO) 4 -anion is formed by reacting with the isolated double bonds, after which the chain double-bond isomerization proceeds generating p complexes with the ferrotricarbonyl residues. The product composed from the h 4 -(butadienyl)ferrotricarbonyl chains with trans-trans and cis-trans units.…”

Section: The Formation Of Metal Sols In Polymers By Thermal Decomposimentioning

confidence: 99%

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Controlled Pyrolysis of Metal‐Containing Precursors as a Way for Synthesis of Metallopolymer Nanocomposites

Pomogailo

Rozenberg

Джардималиева

2004

Metal–Polymer Nanocomposites

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The processes of thermal decomposition play an important role in various practical fields including metallurgy, mineral conversion processes, pyrogenic chemical technology, pyrolysis and thermal treatment of wood and coal, combustion of natural and synthetical fuels, coal carbonization, the prevention of grain spontaneous ignition, and so on. There is still a need for scientifically well-founded approaches to control the thermal decomposition of materials. Many studies focus attention on the chemical transformations and reactions in the pyrolized systems and on the creation of mathematical models of such processes as the major parts of the theory of chemical decomposition of complex substances.Thermolysis is widely used in the synthesis of nano-sized metallopolymer composites. This is a result of the specifics of the preparation of such materials. In spite of a variety of the methods for the preparation of metallopolymer nanocomposites, there are two principal routes: "bottom-up" and "top-down."

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Section: )mentioning

confidence: 98%

Section: The Formation Of Metal Sols In Polymers By Thermal Decomposimentioning

confidence: 99%

Section: )mentioning

confidence: 99%

Section: )mentioning

confidence: 99%

Section: The Formation Of Metal Sols In Polymers By Thermal Decomposimentioning

confidence: 99%

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Controlled Pyrolysis of Metal‐Containing Precursors as a Way for Synthesis of Metallopolymer Nanocomposites

Pomogailo

Rozenberg

Джардималиева

2004

Metal–Polymer Nanocomposites

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LiFe5O8 and BaFe12O19 Fine Particles Crystallised in a Glassy Matrix

Rezlescu

Craus

et al. 1999

Cryst. Res. Technol.

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glass strips (with dimensions 50 mm long, 6 mm wide and about 30÷100 µm thick) subjected to various heat treatments. The irreversible structure changes produced by heat treatments, were investigated by X-ray diffraction and magnetic measurements. The magnetic behaviour is discussed in terms of the evolution of the size of LiFe 5 O 8 and BaFe 12 O 19 crystals dispersed in the glassy matrix, with thermal annealing.

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Magnetic Metallopolymer Nanocomposites: Preparation and Properties

Джардималиева

Pomogailo

Rozenberg

et al. 2009

Magnetic Nanoparticles

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IntroductionThe various physical and mechanical parameters of metallopolymeric nanocomposites can be considerably improved with retention or sometimes even with the increase in the conventional magnetic characteristics (saturation magnetization, coercive force, etc.) that show considerable promise for various applications. Such substances are very perspective as high-density information media, materials for permanent magnets, magnetic cooling systems, or fabrication of magnetic sensors. They can also be used for medical and biological applications, e.g., for magnetic resonance tomography, magnetic targeted drug delivery systems, magnetic resonance imaging (MRI) contrast enhancement, color imaging, and cell sorting [1,2].Ferromagnetic metal particles can be formed in a polymer matrix (ferroplastics or ferroelastics) by practically all methods for synthesis of metal nanoparticles in polymers. The manufacturing method can be subdivided into three large groups: physical, chemical, and physicochemical. The division is very conventional and is based mostly on the method of nanoparticle formation and the character of their interactions with the matrix. The first group of methods includes the procedures seemingly devoid of any chemical interactions between the dispersed phase and the dispersion medium. Composites of this type are rare. More popular chemical methods of manufacturing nanocomposites are based on interactions between components anticipated or detected. The reduction reactions and precursors are well known. Nevertheless, the new approaches have been elaborated from practical demands and many details of the chemical reduction are still unclear. The third group of methods are those when metal or their oxide nanoparticles are formed using high-energy processes of atomic metal evaporation, including low-temperature discharge plasma, radiolysis, and photolysis in the presence of monomer and polymer. Recently, such methods have become widely used in vacuum metallization Magnetic Nanoparticles. Sergey P. Gubin

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Preparation and reactivity of metal-containing monomers

Cited by 14 publications

References 3 publications

Controlled Pyrolysis of Metal‐Containing Precursors as a Way for Synthesis of Metallopolymer Nanocomposites

Controlled Pyrolysis of Metal‐Containing Precursors as a Way for Synthesis of Metallopolymer Nanocomposites

LiFe5O8 and BaFe12O19 Fine Particles Crystallised in a Glassy Matrix

Magnetic Metallopolymer Nanocomposites: Preparation and Properties

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