A non-hydrolytic route to organically-modified silica

Hay, J. N.; Raval, Hema M.; Porter, David W.

doi:10.1039/a807491g

Cited by 21 publications

(19 citation statements)

References 17 publications

(23 reference statements)

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“…The synthesis of 3D cross-linked polysiloxanes has been described by Vioux and coworkers [78,112], and Hay and Raval [113][114][115]. Redistribution reactions of alkoxy and chloro groups take place readily at r.t., while the condensation reactions occur at temperatures from 35 to 150 • C and were catalyzed by Lewis acidic metal chlorides, similar to the syntheses of metal oxides (Section 2.1).…”

Section: Siloxanes By Nhsg Condensations Piers-rubinsztajn Reactionmentioning

confidence: 99%

The Power of Non-Hydrolytic Sol-Gel Chemistry: A Review

et al. 2017

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This review is devoted to non-hydrolytic sol-gel chemistry. During the last 25 years, non-hydrolytic sol-gel (NHSG) techniques were found to be attractive and versatile methods for the preparation of oxide materials. Compared to conventional hydrolytic approaches, the NHSG route allows reaction control at the atomic scale resulting in homogeneous and well defined products. Due to these features and the ability to design specific materials, the products of NHSG reactions have been used in many fields of application. The aim of this review is to present an overview of NHSG research in recent years with an emphasis on the syntheses of mixed oxides, silicates and phosphates. The first part of the review highlights well known condensation reactions with some deeper insights into their mechanism and also presents novel condensation reactions established in NHSG chemistry in recent years. In the second section we discuss porosity control and novel compositions of selected materials. In the last part, the applications of NHSG derived materials as heterogeneous catalysts and supports, luminescent materials and electrode materials in Li-ion batteries are described.

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Section: Siloxanes By Nhsg Condensations Piers-rubinsztajn Reactionmentioning

confidence: 99%

The Power of Non-Hydrolytic Sol-Gel Chemistry: A Review

et al. 2017

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“…Moreover, the solid silicone powder containing Si-H and Si-OCH 3 bonds can be further chemically modified by hydrosilylation and esterification reactions. These features make the deposited silicone an interesting precursor to silicon oxides modified 50,51 with large organic groups.…”

Section: Resultsmentioning

confidence: 99%

Laser photolysis of trimethoxysilane: chemical vapour deposition of nanostructured silicone powders with SiH and SiOCH₃ bonds

Bastl

Boháček

Pola

2003

Applied Organom Chemis

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Gas-phase photolysis of trimethoxysilane, achieved for the first time by focused ArF laser radiation at 193 nm, yields C 1,2 hydrocarbons, methanol and carbon monoxide along with ultrafine nanostructured silicone powder possessing -SiO 3 and SiO 4 configurations and Si-H and Si-OCH 3 bonds. The photolytic process, resulting in efficient removal of the methyl groups, is explained as a multitude of steps involving cleavages of all the available bonds.

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“…The pH values of systems (C) and (D) after stirring at 60°C for 1 h were 3.76 and 3.08, respectively, which were close to the pH values at which a minimum polycondensation rate was encountered. It is reported that the PhTES system shows a minimum polycondensation rate around pH 4 Table 3 Chemical shifts and the number of substituents in the corresponding Si species [10][11][12][13][14][15][16][17] No.…”

Section: Hydrolysis and Polycondensation Mechanism Of Scmmentioning

confidence: 99%