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Organotin Compounds in Synthesis of Chemically Modified Silica

✍ Scribed by P.G. Mingalyov; D.V. Rzhevsky; Yu.D. Perfiliev; G.V. Lisichkin

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
48 KB
Volume
241
Category
Article
ISSN
0021-9797

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✦ Synopsis

It is shown that alkylchlorostannanes can be successfully used for synthesis of chemically modified silica. The hydrolytic stability of the materials obtained is studied. It is revealed that grafted layers of Et 3 SnCl and Et 2 SnCl 2 can be removed at pH values lower than 4, whereas silica modification with EtSnCl 3 produces layers that are stable at pH values 0-7. M össbauer spectroscopy of the samples obtained was done; parameters of the spectra are determined. It is found that rigidity of attachment of tin atoms strongly increases in passing from Et 3 SnCl to Et 2 SnCl 2 and, further, to EtSnCl 3 .

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