Synthetic transition metal phyllosilicates and organic-inorganic related phases

Richard‐Plouet, Mireille; Vilminot, S.; Guillot, M.

doi:10.1039/b316089k

Cited by 29 publications

(16 citation statements)

References 48 publications

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“…[155][156][157] The sol-gels ynthesis of talc is performed at room temperature for 24 hb yu sing organotrialkoxysilane (RSi(OR') 3 )a sas ilicon source, where Ri st he organic part and R' corresponds to ethoxyo rm ethoxy groups. [137] For example, linear alkyl, [158][159][160] functionalized linear alkyl [134,153,161] and phenyl [162] have been employed for the synthesis of organotalcs (Table1). This synthesis leads to talc with organic moieties covalently linked to the silicon atoms of the tetrahedral sheets and hangingi nt he interlayer space.…”

Section: The Sol-gel Processmentioning

confidence: 99%

Synthetic Talc and Talc‐Like Structures: Preparation, Features and Applications

Claverie

Dumas

Carême

et al. 2017

Chemistry A European J

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This contribution gives a comprehensive review about the progress in preparation methods, properties and applications of the different synthetic talc types: i) crystalline nanotalc synthesized by hydrothermal treatment; ii) amorphous and/or short-range order nanotalc obtained by precipitation, and iii) organic-inorganic hybrid talc-like structures obtained through a sol-gel process or a chemical grafting. Several advantages of nanotalc such as high chemical purity, high surface area, tunable submicronic size, high thermal stability, and hydrophilic character (leading to be the first fluid mineral) are emphasized. Synthetic nanotalc applications are also considered including its use as nanofiller in composite materials, as absorbers of organic compounds, as anticorrosion coatings and as agents for cosmetic applications. Regarding their high industrial application potential, intensive research has been carried out to better understand their behavior and develop processes to produce them. To facilitate further research and development, scientific and technical challenges are discussed in this Review article.

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Section: The Sol-gel Processmentioning

confidence: 99%

Synthetic Talc and Talc‐Like Structures: Preparation, Features and Applications

Claverie

Dumas

Carême

et al. 2017

Chemistry A European J

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“…The copolymerization of organotrialkoxysilanes in the presence of metal ions such as Mg, Ni, and Al led to the formation of layered hybrids in which organic groups are covalently attached to phyllosilicate-like layers. 9,10 The hydrophobic interaction between organic groups and the tendency of metal ions to form octahedral sheets play crucial roles in the formation of the layered structures.…”

Section: ᭤ Kazuyuki Kuroda Received His Bachelor's Degree In 1974 Mamentioning

confidence: 99%

Designed synthesis of nanostructured siloxane–organic hybrids from amphiphilic silicon-based precursors

2006

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This paper reports on recent progress in the synthesis of nanostructured siloxane-organic hybrids based on the self-assembly of amphiphilic silicon-based precursors. A variety of ordered hybrid materials have been obtained by molecular design of the precursors. Alkoxysilanes and chlorosilanes with covalently attached hydrophobic organic tails are hydrolyzed to form amphiphilic molecules containing silanol groups, leading to the formation of layered (lamellar) structures. Transparent and oriented thin films of lamellar hybrids were prepared by the reaction in the presence of tetraalkoxysilane. In addition, the design of molecules having alkyl chains and large oligosiloxane heads led to the formation of mesophases consisting of cylindrical assemblies, providing a direct pathway to ordered porous silica. The synthesis, structural features, and formation processes of these hybrid mesostructures are discussed.

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“…29 Si NMR spectra can also give valuable information about the nature of the attachment of organic chains to the silicate formed in this sol-gel process. Again the peak assignments are based on previous data for analogous systems [1,15,18], in which other silylating molecules were covalently bonded to phyllosilicate structures. Thus, the spectra for both lamellar hybrids are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Silicon atoms attached to the inorganic backbone proceeded from an alkoxyde to form tetrahedral SiO 4 sheet units or from a desired silylating agent, to give covalent Si-C bonds, also adjusted in tetrahedral sheets. Normally the chosen metallic divalent cation components are located in an octahedrally arrangement in the layer by forming 1:1 or 2:1 families [1][2][3][4][5][6]. The synthetic materials have some advantages over the similar natural clays, such as smectite or mica, due to the purer chemical composition or controlled quantities of defects in the final product [7].…”

Section: Introductionmentioning

confidence: 98%