Mechanochemical Synthesis of Poly(germanium and tin organosiloxanes)

Капустина, А. А.; Шапкин, Н. П.; Ivanova, E. B.; Lyakhina, A. A.

doi:10.1007/s11176-005-0273-3

Cited by 9 publications

(5 citation statements)

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“…The research strategy is to obtain and isolate the maximum amount of polycalcium organylsiloxanes using the method of mechanochemical activation. The conditions of mechanochemical activation for obtaining different polycalcium organylsiloxanes are optimized and elaborated [ 42 , 43 , 44 , 45 , 46 ]. Due to the friable, permeable structure of the sea urchin skeleton, synthesis is much faster and yields higher yields than with crystalline CaCO 3 or CaO [ 39 ].…”

Section: Methodsmentioning

confidence: 99%

Silica-Containing Biomimetic Composites Based on Sea Urchin Skeleton and Polycalcium Organyl Silsesquioxane

Shapkin,

Khalchenko,

Drozdov

et al. 2023

Biomimetics

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The paper presents an original approach to the synthesis of polycalciumorganyl silsesquioxanes through the reaction of polyorganyl silsesquioxanes [RSiO1.5]n (where R is an ethyl and phenyl radical) with sea urchin skeleton under the conditions of mechanochemical activation. The novelty and practical significance of the present study lies in the use of an available natural raw source as a source of calcium ions to initiate the reaction of calcium silicate formation and create a matrix for the formation of a porous inorganic composite framework. The thermal stability of the introduced silicates, i.e., the ability to maintain a porous structure at high temperatures, is key to the production of an ordered porous material. The reaction scheme was proposed to be based on the interaction of calcium carbonate with the siloxane bond. FTIR, XRD, GPC, and TGA were used to study the composition and structure of the obtained materials. The cross-sectional area of the polymer chain and the volumes of the coherent scattering regions of the polymers obtained were calculated from the XRD data. To prepare the composites, the sea urchin skeleton was further modified with polycalciumorganyl silsesquioxanes in a toluene solution. To remove the sea urchin skeleton, the obtained biomimetic composites were treated with hydrochloric acid. The results of the morphological and surface composition studies are reported. The method proposed in the paper could be of fundamental importance for the possibility of obtaining structured porous composite materials for a wide range of practical applications, including for the purpose of creating a composite that may be a promising carrier for targeted delivery of chemotherapy agents.

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Section: Methodsmentioning

confidence: 99%

Silica-Containing Biomimetic Composites Based on Sea Urchin Skeleton and Polycalcium Organyl Silsesquioxane

Shapkin,

Khalchenko,

Drozdov

et al. 2023

Biomimetics

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“…The method of mechanochemical activation is becoming more and more popular not only in the synthesis of inorganic and organic compounds [1][2][3][4][5][6][7][8], but also in the modi cation of elementorganic polymers [9][10][11][12][13][14]. It is widely used as one of the methods for modifying high molecular weight compounds, as well as for processing secondary polyole ns [15], removing persistent organic pollutants [16].…”

Section: Introductionmentioning

confidence: 99%

Interaction of Polyphenylsilsesquioxane With Various β-diketonate Complexes of Titanium By Mechanochemical Activation

Libanov

Капустина²,

Шапкин³

et al. 2022

Preprint

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In the present work, we studied the interaction of polyphenylsilsesquioxane with various β-diketonate complexes of titanium by mechanochemical activation. Polyphenylsilsesquioxane, bis-(2,4-pentanedionate) titanium dichloride, bis-(1-phenyl-1,3-butanedionate) titanium dichloride and bis-(1,3-diphenyl-1,3-propanedionate) titanium dichloride were used as starting reagents. Synthesis products were studied by various chemical and physicochemical methods of analysis. The composition of the obtained compounds has been determined. It is shown that under conditions of mechanochemical activation, high molecular weight products with a Si/Ti ratio different from the specified ones are formed. In addition, under the action of mechanical stresses, the initial titanium complexes (with the exception of acetylacetonate) polymerize with the formation of coordination high-molecular compounds, which are destroyed by the addition of ethyl alcohol. The work is fundamental and contributes to the understanding of the mechanisms of mechanochemical synthesis. The work is aimed at finding effective and environmentally friendly methods for the synthesis and modification of elementorganic high-molecular compounds.

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“…The possibility of the fabrication of polycuprophenylsiloxanes was studied by A.A. Kapustina et al [11]. Syntheses based on polyphenylsiloxane, polydialkyltinphenylsiloxane [12], and polygermanophenylsiloxane [13] under mechanochemical activation conditions were conducted with different yields depending on the nature of metal-containing precursors. In particular, in the first case, difunctional dibutyltin oxide was used, while in the second one -tin and germanium oxides.…”

Section: Introductionmentioning

confidence: 99%

“…Analyzing the obtained data on the synthesis of polymetallosiloxanes under mechanochemical activation, one should mention that the interaction of polyorganylsiloxane with metal acetylacetonate proceeded in depth for elements that formed acidic oxides, for example, boron [17], phosphorus [19], and compounds of amphoteric elements [12,13]. In case of d-metal complexes, the reaction proceeded with difficulty [11,16,18] and at an increased temperature [18].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Magnesium-Silicon Nanocomplexes by the Interaction of Polyphenylsiloxane with Magnesium Carbonate

Шапкин

Maslova

Papynov

et al. 2021

MSF

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The interaction of magnesium carbonate with polyphenylsiloxane under the conditions of mechanochemical activation with subsequent heating has been investigated. Based on the TGA and DTA data, it has been shown that, upon heating up to 420°C, the reaction proceeded completely with the release of carbon dioxide. The polymer was dissolved in DMFA and purified by repeated precipitation with water. The polymer yield was 64%. The residue insoluble in organic solvents has been obtained by evaporation of an aqueous solution. The composition and structure of the synthesis products have been analyzed by means of element analysis, IR spectroscopy, and diffractometry. It has been demonstrated that the fraction soluble in DMFA had a silicon-to-magnesium ratio equal to 4.2, while the fraction isolated from water had this ratio equal to 1.0. The IR and XRD data enabled one to conclude that, regardless of the different compositions, the structures of all fractions were similar and corresponded to mesomorphic layered polymers produced by the ion exchange method.

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Mechanochemical Synthesis of Poly(germanium and tin organosiloxanes)

Cited by 9 publications

References 0 publications

Silica-Containing Biomimetic Composites Based on Sea Urchin Skeleton and Polycalcium Organyl Silsesquioxane

Silica-Containing Biomimetic Composites Based on Sea Urchin Skeleton and Polycalcium Organyl Silsesquioxane

Interaction of Polyphenylsilsesquioxane With Various β-diketonate Complexes of Titanium By Mechanochemical Activation

Fabrication of Magnesium-Silicon Nanocomplexes by the Interaction of Polyphenylsiloxane with Magnesium Carbonate

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