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|Type:||Artigo de periódico|
|Title:||The pesticide 3-(3,4-dichlorophenyl)-1,1-dimethylurea (Diuron) immobilized on silica gel surface|
|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.|
|Editor:||Academic Press Inc|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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