Self-assembly of POSS-Containing Materials

Kowalewska, Anna

doi:10.1007/978-3-030-02327-0_3

Cited by 4 publications

(2 citation statements)

References 315 publications

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“…Well-defined polycyclic silsesquioxanes comprise a unique class of three-dimensional siloxane building blocks that can adopt cube, incomplete-cage, and ladderlike structures. This class has attracted significant attention as potential materials due to their excellent electrical insulating and prominent optical and mechanical properties in addition to their thermal stability. − Over the past decades, numerous synthetic approaches have been explored to use these materials as small silica fillers in composite resins and to incorporate them as monomers targeting various types of inorganic/organic hybrid polymers with novel properties. − Precise construction of the silsesquioxane framework and controlled introduction of functional groups to the silsesquioxane moieties have become increasingly important, as they offer a straightforward synthetic pathway for tailor-made materials.…”

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confidence: 99%

Synthesis of Double-Decker Silsesquioxanes from Substituted Difluorosilane

et al. 2019

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A novel synthetic method for the construction of a double-decker silsesquioxane from fluorosilanes was developed. Phenyl-substituted double-decker silsesquioxane was prepared under mild conditions by coupling difluorodiphenylsilane and a tetrasiloxanolate precursor. A similar reaction was performed using difluorovinylsilane, and a divinyl double-decker silsesquioxane was obtained. The one-step reaction of a functional difluorosilane containing an aminopropyl group afforded a novel double-decker silsesquioxane with two amino groups complexed with BF3, which can react with carboxylic acid anhydrides to afford an amide product. This synthetic method using difluorosilane is tolerant of a wide range of functional groups and is applicable to the synthesis of polycyclic silsesquioxanes bearing amino groups, which are difficult to directly obtain from dichlorosilane.

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confidence: 99%

Synthesis of Double-Decker Silsesquioxanes from Substituted Difluorosilane

et al. 2019

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“…The organic groups on its surface provide functional groups that can easily react with other molecules, allowing for tailored surface modi cations. This property makes APTPOSS useful in areas such as adhesion promotion, surface functionalization, and the development of hybrid materials [11,12].…”

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confidence: 99%

Silica/APTPOSS anchored on MnFe 2 O 4 as an efficient nanomagnetic composite for the preparation of spiro- pyrano[2, 3-c]chromene derivatives

Najafabadi,

Safaei-Ghomi

2024

Preprint

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The synthesis of Octakis [3- (3-amino propyl triethoxysilane) propyl] octa-silsesquioxane (APTPOSS), a derivative of polyhedral oligomeric silsesquioxane, was utilized to produce an efficient nanocomposite. MNPs@Silica/APTPOSS was characterized through scanning electron microscopy, Fourier transform infrared spectroscopy, vibrating sample magnetometry, X-ray diffraction, and thermogravimetric analysis. These magnetic nanoparticles, a combination of organic-inorganic hybrid polyhedral oligomeric silsesquioxane, were utilized as a proficient heterogeneous catalyst in the one-pot synthesis of spirooxindoles derivatives. Furthermore, they could be swiftly isolated and reused six times while maintaining their catalytic efficiency.

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Tuning morphology of siloxane bond‐based polybenzoxazines by controlling the sol–gel and curing processes

Casarino

Bortolato

Estenoz

et al. 2021

Polymer Engineering & Sci

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Novel polybenzoxazine/polysilsesquioxane nanocomposites were synthesized with uniform and reproducible structural morphology, high Tg, and good thermal stability. Polysilsesquioxane was oriented in a nanometer‐size lamellar structure. Benzoxazine monomer based on silane (BA‐3aptms) was synthesized by reaction between bisphenol A, 3‐(trimethoxysilyl)propylamine, and paraformaldehyde in a 1:2:4 molar ratio. Four experimental conditions of the two stage sol–gel process for polysilsesquioxane were studied, and their effect on the material characteristics investigated. In the first stage, hydrolysis was favored, while the second stage mostly consisted of condensation. The reaction condition with the longest hydrolysis time allowed the increase of the concentration of silanol units and the selective condensation, favoring the formation of a higher amount of cage‐like cyclic structures. In addition, this experimental procedure was well controlled so that the sol–gel and oxazine‐ring opening reactions were extremely reproducible from batch to batch. All processes were monitored by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis and dynamic mechanical thermal analysis, scanning electron and transmission electron microscopies, and X‐ray diffraction. A chemometric approach based on a multivariate curve resolution model was applied to the FTIR spectra, which allowed the identification of four reaction components associated with the sol–gel and the curing processes.

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Self-assembly of POSS-Containing Materials

Cited by 4 publications

References 315 publications

Synthesis of Double-Decker Silsesquioxanes from Substituted Difluorosilane

Synthesis of Double-Decker Silsesquioxanes from Substituted Difluorosilane

Silica/APTPOSS anchored on MnFe 2 O 4 as an efficient nanomagnetic composite for the preparation of spiro- pyrano[2, 3-c]chromene derivatives

Tuning morphology of siloxane bond‐based polybenzoxazines by controlling the sol–gel and curing processes

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