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Immobilization of the pesticide 2,4‐dichlorophenoxyacetic acid on a silica gel surface
Author(s) -
Prado Alexandre G S,
Airoldi Claudio
Publication year - 2000
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/(sici)1526-4998(200005)56:5<419::aid-ps142>3.0.co;2-7
Subject(s) - propylamine , silica gel , chemistry , amine gas treating , covalent bond , mesoporous silica , yield (engineering) , nitrogen , nuclear chemistry , organic chemistry , polymer chemistry , catalysis , materials science , mesoporous material , metallurgy
A route for the immobilization of 2,4‐dichlorophenoxyacetic acid (2,4‐D) on silica gel has been developed. In the first step the precursor was prepared by reacting the silylating agent 3‐(trimethoxysilyl)propylamine with silica gel. Nitrogen analysis of this anchored compound showed the presence of 1.16 mmol of amine groups per gram of support. The herbicide was covalently bonded to the amine groups previously anchored onto silica gel. Infrared, [ 13 C] and [ 29 Si] NMR spectra supported the reaction between the nitrogen of the amine group of the anchored silica with the carbon on the para ‐position of the aromatic ring of 2,4‐D. The reaction yield, 90.3%, was confirmed through elemental analysis. © 2000 Society of Chemical Industry