Topic
Silica gel
About: Silica gel is a research topic. Over the lifetime, 22313 publications have been published within this topic receiving 325516 citations. The topic is also known as: Amorphous silica & Precipitated amorphous silica.
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TL;DR: In this paper, the preparation and optical properties of Eu(III) chelates (the complexes of β-diketones) are described, in particular the emission and excitation spectra of the precursor salts and glasses are reported.
83 citations
83 citations
TL;DR: Results indicated that nano-effect, or restriction effect, produced from the nano-pores of silica gel was the reason for the abnormal FT-IR and FTRaman spectra.
83 citations
15 Nov 1997
TL;DR: The silylating agent 3-trimethoxysilyl-1-propanethiol was immobilized on silica gel and adsorption of n-butylamine and benzylamine is significatively enhanced in relation to the other amines, suggesting that the degree of adsorbed of the studied amines is intimately related to their dissociation constants.
Abstract: The silylating agent 3-trimethoxysilyl-1-propanethiol was immobilized on silica gel. Sulphur analysis showed 0.98 mmol of thiol groups per gram of support. These groups chemisorbed divalent cations: nickel, cobalt, copper, and mercury in the pH range from 1 to 6. The adsorption is more significant for mercury in relation to the other cations in the pH range studied. The primary amines, methylamine, ethylamine, n-butylamine, and benzylamine, were adsorbed on silica-thiol surface and on silica-thiol surface with mercury adsorbed. The values of adsorption constants were calculated using Langmuir isotherms data. Using these values, equilibrium constants and DeltaG values for each adsorption system were also obtained. When mercury is present on the silica surface, the adsorption of n-butylamine and benzylamine is significatively enhanced in relation to the other amines. This behavior suggests that the degree of adsorption of the studied amines is intimately related to their dissociation constants. Copyright 1997 Academic Press. Copyright 1997Academic Press
83 citations
TL;DR: In this paper, homogeneous polystyrene and silica gel polymer hybrids have been prepared utilizing the sol-gel reaction of phenyltrimethoxysilane; π-π interactions between phenyl groups of the organic polymer and those of silica gels were found to play a critical role for the homogeneity.
83 citations