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Type: Artigo de periódico
Title: Immobilization of 5-amino-1,3,4-thiadiazole-thiol onto silica gel surface by heterogeneous and homogeneous routes
Author: Prado, AGS
Sales, JAA
Carvalho, RM
Rubim, JC
Airoldi, C
Abstract: The compound 5-amino-1,3,4-thiadiazole-thiol (ATT) was anchored onto silica gel surfaces by homogeneous and heterogeneous routes. Both silica modification methodologies resulted in similar products, named SiCTT and SiATT, respectively. These materials were characterized by infrared and Raman spectroscopies, superficial area and elemental analysis as well as C-13 and Si-29 NMR spectroscopy. Elemental analysis proved that the material SiCTT presented a higher ATT immobilization than SiATT, with values of 0.73 and 0.65 mmol g(-1), respectively. NMR, Raman and infrared spectroscopy corroborate to confirm the immobilization of ATT on both surfaces. Raman spectroscopy showed that the reaction of the ATT with silylant agent or pre-modified silica occurred by the thiol group, resulting in a surface with two sulfur groups and one free amine group able to complex soft and hard acids. (C) 2003 Elsevier B.V. All rights reserved.
Country: Holanda
Editor: Elsevier Science Bv
Citation: Journal Of Non-crystalline Solids. Elsevier Science Bv, v. 333, n. 1, n. 61, n. 67, 2004.
Rights: fechado
Identifier DOI: 10.1016/j.jnoncrysol.2003.09.053
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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