18138-35-7

Upstream product

• 6838-45-5 1,1,3,3-tetrachloro-1,3-diphenyldisiloxane 
• 2996-92-1 phenyl trimethylsiloxane 
• 780-69-8 triethoxyphenylsilane 
• 3047-74-3 phenylsilanetriol 

Downstream Products

• 18758-91-3 1,1,1,7,7,7-hexamethyl-3,5-diphenyl-3,5-bis(trimethylsiloxy)tetrasiloxane 

Relevant academic research and scientific papers

The enzymatic cleavage of Si-O bonds: A kinetic analysis of the biocatalyzed hydrolysis of phenyltrimethoxysilane

Previously we reported the ability of trypsin to mediate the cross-linking of alkoxysily-functionalized silicone polymers. Although enzymes and silicon-containing compounds are not necessarily incompatible species, the exact mechanism of how enzymes process silicon substrates is not fully understood. The focus of this current work was to examine the reaction kinetics associated with the processing of an alkoxysilane substrate by enzymes using 29Si NMR so as to gain a greater insight into the actual reaction mechanism, especially those involving more complex silicone systems. A series of time course 29Si NMR experiments using D2O revealed that the trypsin-mediated hydrolysis of a single alkoxy moiety in water is a pseudo-first order reaction. The relative effect of the enzyme was determined to be β = 3.549 while the relative effect of water was γ = 3.325. Prolonged contact with phenyltrimethoxysilane was not sufficiently deleterious to the enzyme and did not induce the complete and irreversible denaturation of trypsin. Computational evidence suggests that while in the active site of the enzyme, serine addition to silicon to forms a pentacoordinate species and is favoured over histidine addition.

Synthesis of colloidal Janus nanoparticles by asymmetric capping of mesoporous silica with phenylsilsesquioxane

Colloidal mesoporous silica nanoparticles asymmetrically capped with non-porous phenylsilsesquioxane have been prepared by adding phenyltriethoxysilane to an aqueous dispersion of mesostructured silica-surfactant composite nanoparticles. The integration of colloidal stability, mesoporosity and the Janus structure is quite promising for materials design applicable in various fields, including catalysis, biomedicine and coatings.

Synthesis and crystal structure of disiloxane-1,3-diols and disiloxane-1,1,3,3-tetraol

1,3-Dimethyl- or 1,3-divinyl-1,3-di-t-butoxydisiloxane-1,3-diol and 1,3-diphenyldisiloxane-1,1,3,3-tetraol were synthesized by hydrolysis of the corresponding diisocyanatodisiloxanes and tetrachlorodisiloxane. The disiloxanediols were soluble in common or

Silanol Compound, Composition, and Method for Producing Silanol Compound

The purpose of the present invention is to provide silanol compounds that can be used as raw materials of siloxane compounds and the like, and a composition of the silanol compounds, as well as to provide a production method that makes it possible to produce silanol compounds at excellent yield. A composition comprising 5 mass % to 100 mass % of a silanol compound represented by Formulas (A) to (C) can be prepared by devising to produce silanol compounds under water-free conditions, to produce silanol compounds in a solvent having the effect of suppressing the condensation of silanol compounds, and to perform other such processes, the composition being able to be used as a raw material or the like of siloxane compounds because the silanol compounds can be stably present in the resulting composition.

Acid-catalyzed condensation reaction of phenylsilanetriol: Unexpected formation of cis,trans -1,3,5-trihydroxy-1,3,5-triphenylcyclotrisiloxane as the main product and its isolation

cis,trans-1,3,5-Trihydroxy-1,3,5-triphenylcyclotrisiloxane was successfully isolated and fully characterized by spectroscopic methods and single-crystal X-ray diffraction. This compound was believed to be highly unstable and only exist as a transient species in low concentration during the condensation reaction of phenylsilanetriol or its precursors. The isolated pure cyclotrisiloxane is, however, surprisingly stable even in acidic solution and partially isomerizes to the cis,cis isomer.

Nonhydrolytic synthesis of silanols by the hydrogenolysis of benzyloxysilanes

The hydrogenolysis of benzyloxysilanes was smoothly catalyzed by Pd/C in THF to give corresponding silanols under nonhydrolytic conditions. The reaction proved to be applicable to various benzyloxysilanes giving silanemonools, diol, and triol.

Syntheses and Structural Analyses of 1,3-Diphenyldisiloxanes as a Building Block of Silsesquioxanes

Syntheses of novel 1,3-diphenyldisiloxanes were investigated. 1,1,3,3-Tetrachloro-1,3-diphenyldisiloxane (1) and 1,1,3,3-tetraisocyanato-1,3-diphenyldisiloxane (2) were obtained by vapor-phase hydrolytic condensation of trichloro(phenyl)silane and triisoc