Photostabilization of Trifluralin Adsorbed on a Clay Matrix

Leon Margulies; Leon Margulies; Theodor Stern; Luis O. Ruzo; Baruch Rubin

doi:10.1021/jf00013a030

Photostabilization of Trifluralin Adsorbed on a Clay Matrix

Leon Margulies, Leon Margulies, Theodor Stern, Luis O. Ruzo, Baruch Rubin

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53 Scopus citations

Abstract

The photochemical behavior of trifluralin (TF) adsorbed on montmorillonite (Mont), with and without the organic cation thioflavin T (TFT) coadsorbed, is reported. The effect of complexation on the photostability of TF was studied by measuring the reaction rates and photoproduct yields in photolysis experiments and the herbicidal activity of TF in soil samples following exposure to UV light, using oat roots bioassays. In the two complexes (Mont-TF and Mont-TFT-TF) considerable photostabilization of TF was observed, as compared with the herbicide in its free form. The interactions between TF and the clay were studied by Fourier-transform infrared spectroscopy. It is suggested that photostabilization is due to steric hindrance imposed by the clay surface to the cyclization step of the photochemical reaction.

Original language	English
Pages (from-to)	152-155
Number of pages	4
Journal	Journal of Agricultural and Food Chemistry
Volume	40
Issue number	1
DOIs	https://doi.org/10.1021/jf00013a030
State	Published - 1 Jan 1992
Externally published	Yes

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abstract = "The photochemical behavior of trifluralin (TF) adsorbed on montmorillonite (Mont), with and without the organic cation thioflavin T (TFT) coadsorbed, is reported. The effect of complexation on the photostability of TF was studied by measuring the reaction rates and photoproduct yields in photolysis experiments and the herbicidal activity of TF in soil samples following exposure to UV light, using oat roots bioassays. In the two complexes (Mont-TF and Mont-TFT-TF) considerable photostabilization of TF was observed, as compared with the herbicide in its free form. The interactions between TF and the clay were studied by Fourier-transform infrared spectroscopy. It is suggested that photostabilization is due to steric hindrance imposed by the clay surface to the cyclization step of the photochemical reaction.",

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AU - Margulies, Leon

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AB - The photochemical behavior of trifluralin (TF) adsorbed on montmorillonite (Mont), with and without the organic cation thioflavin T (TFT) coadsorbed, is reported. The effect of complexation on the photostability of TF was studied by measuring the reaction rates and photoproduct yields in photolysis experiments and the herbicidal activity of TF in soil samples following exposure to UV light, using oat roots bioassays. In the two complexes (Mont-TF and Mont-TFT-TF) considerable photostabilization of TF was observed, as compared with the herbicide in its free form. The interactions between TF and the clay were studied by Fourier-transform infrared spectroscopy. It is suggested that photostabilization is due to steric hindrance imposed by the clay surface to the cyclization step of the photochemical reaction.

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Photostabilization of Trifluralin Adsorbed on a Clay Matrix

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