The chemical reactivity of sol-gel materials: Hydrobromination of ormosils

H. Frenkel-Mullerad; D. Avnir

doi:10.1021/cm000516h

The chemical reactivity of sol-gel materials: Hydrobromination of ormosils

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Abstract

The chemical reactivity of sol-gel materials prepared via base catalysis from mixtures of Si(OEt)₄ and RSi(OEt)₃, where R is an n-alkenyl group bearing the double bond at the terminal position, was studied through the double-bond hydrobromination addition reaction. The reactivity and kinetics were studied as a function of the length of R and as a function of variations in the material preparation procedure. The initial reaction rates and the total capacity of the materials to act as "bromine sponges" depend inversely on the size of R. This behavior is interpreted, among other parameters, in terms of the formation of early micellar structures of the hydrolyzed RSi(OEt)₃ species. Of the various R residues studied, the most efficient bromine sponge is the allyl residue.

Original language	English
Pages (from-to)	3754-3759
Number of pages	6
Journal	Chemistry of Materials
Volume	12
Issue number	12
DOIs	https://doi.org/10.1021/cm000516h
State	Published - 2000
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Materials Chemistry

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10.1021/cm000516h

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title = "The chemical reactivity of sol-gel materials: Hydrobromination of ormosils",

abstract = "The chemical reactivity of sol-gel materials prepared via base catalysis from mixtures of Si(OEt)4 and RSi(OEt)3, where R is an n-alkenyl group bearing the double bond at the terminal position, was studied through the double-bond hydrobromination addition reaction. The reactivity and kinetics were studied as a function of the length of R and as a function of variations in the material preparation procedure. The initial reaction rates and the total capacity of the materials to act as {"}bromine sponges{"} depend inversely on the size of R. This behavior is interpreted, among other parameters, in terms of the formation of early micellar structures of the hydrolyzed RSi(OEt)3 species. Of the various R residues studied, the most efficient bromine sponge is the allyl residue.",

author = "H. Frenkel-Mullerad and D. Avnir",

year = "2000",

doi = "10.1021/cm000516h",

language = "English",

volume = "12",

pages = "3754--3759",

journal = "Chemistry of Materials",

issn = "0897-4756",

publisher = "American Chemical Society",

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TY - JOUR

T1 - The chemical reactivity of sol-gel materials

T2 - Hydrobromination of ormosils

AU - Frenkel-Mullerad, H.

AU - Avnir, D.

PY - 2000

Y1 - 2000

N2 - The chemical reactivity of sol-gel materials prepared via base catalysis from mixtures of Si(OEt)4 and RSi(OEt)3, where R is an n-alkenyl group bearing the double bond at the terminal position, was studied through the double-bond hydrobromination addition reaction. The reactivity and kinetics were studied as a function of the length of R and as a function of variations in the material preparation procedure. The initial reaction rates and the total capacity of the materials to act as "bromine sponges" depend inversely on the size of R. This behavior is interpreted, among other parameters, in terms of the formation of early micellar structures of the hydrolyzed RSi(OEt)3 species. Of the various R residues studied, the most efficient bromine sponge is the allyl residue.

AB - The chemical reactivity of sol-gel materials prepared via base catalysis from mixtures of Si(OEt)4 and RSi(OEt)3, where R is an n-alkenyl group bearing the double bond at the terminal position, was studied through the double-bond hydrobromination addition reaction. The reactivity and kinetics were studied as a function of the length of R and as a function of variations in the material preparation procedure. The initial reaction rates and the total capacity of the materials to act as "bromine sponges" depend inversely on the size of R. This behavior is interpreted, among other parameters, in terms of the formation of early micellar structures of the hydrolyzed RSi(OEt)3 species. Of the various R residues studied, the most efficient bromine sponge is the allyl residue.

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U2 - 10.1021/cm000516h

DO - 10.1021/cm000516h

M3 - Article

AN - SCOPUS:0034500507

SN - 0897-4756

VL - 12

SP - 3754

EP - 3759

JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 12

ER -

The chemical reactivity of sol-gel materials: Hydrobromination of ormosils

Abstract

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