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Type: Artigo de periódico
Title: Synthesis and solid-state NMR investigations of radiation-immobilized polysiloxanes on bare, titanium-grafted, and zirconium-grafted silicas
Author: Bachmann, S
Melo, LFC
Silva, RB
Anazawa, TA
Jardim, ICSF
Collins, KE
Collins, CH
Albert, K
Abstract: Three different reversed-phase materials for high-performance liquid chromatography, obtained by sorption of poly(methyloctylsiloxane) (PMOS) onto bare silica, titanized silica, and zirconized silica pores, followed by immobilization with gamma -radiation, were characterized by means of solid-state NMR spectroscopy. The surface properties of these stationary phases were investigated by Si-29 CP/MAS and C-13 CP/MAS NMR spectroscopy, gamma -Radiation causes the formation of new bonds, either between PMOS and the different supports or between different siloxane chains, which leads, in either case, to a higher amount of polysiloxane immobilized onto the silica support material.
Country: EUA
Editor: Amer Chemical Soc
Citation: Chemistry Of Materials. Amer Chemical Soc, v. 13, n. 5, n. 1874, n. 1879, 2001.
Rights: fechado
Identifier DOI: 10.1021/cm001179f
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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