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- W2004185777 abstract "Abstract We have studied the effects and applications of high intensity ultrasound in the reductive condensation synthesis of polysilanes and polysilynes, a new class of amorphous [RSi]n alkyl silicon network polymers. Best results were obtained in the sonication of liquid Na/K alloy with R2SiCl2 and RSiCl3 monomers. Sonochemically activated reactions in Na/K alloy-hydrocarbon emulsions proceed without the normal complications associated with surface passivation, and allow more precise control of reaction rate, stoichiometry, and polymer molecular weight. In the reactions of RSiCl3 monomers, sonication also decreases the tendency towards formation of insoluble and incompletely reduced network products. These procedures allowed the isolation of the first soluble polymers with the simple composition [RSi]n, (for R = alkyl substituents of at least three carbons). All spectroscopic data indicated these materials, termed polysilynes, are constructed primarily from (sp3) hybridized alkylsilyne [RSi] fragments, irregularly assembled via Si Si single bonds into random networks." @default.
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- W2004185777 date "1990-09-01" @default.
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- W2004185777 title "Sonochemical Na/K alloy emulsion synthesis of polysilynes" @default.
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- W2004185777 doi "https://doi.org/10.1016/0041-624x(90)90037-o" @default.
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