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Type: Artigo de periódico
Title: The pesticide 3-(3,4-dichlorophenyl)-1,1-dimethylurea (Diuron) immobilized on silica gel surface
Author: Prado, AGS
Airoldi, C
Abstract: A route for 3-(3,4-dichlorophenyl)-1,l-dimethylurea (diuron) immobilization on silica gel was established after reacting at the first stage the precursor silylant agent 3-trimethoxysilylpropylamine to the support. The pesticide was covalently bonded to available amine groups of the precursor, giving 1.03 mmol of amine per gram of silica. Infrared, C-13, and Si-29 NMR spectra are in agreement with the proposed reaction between nitrogen of the amine group of the previously anchored silica to carbon on the para-position of the aromatic ring of the pesticide. The immobilization is clearly affected by the presence or absence of disprotonating agent, to give 12.50 and 68.40% reaction yield, respectively; these results were confirmed through elemental analysis. (C) zool Academic Press.
Subject: pesticide
Country: EUA
Editor: Academic Press Inc
Citation: Journal Of Colloid And Interface Science. Academic Press Inc, v. 236, n. 1, n. 161, n. 165, 2001.
Rights: fechado
Identifier DOI: 10.1006/jcis.2000.7401
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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