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Investigation of the photochemistry of urea herbicides (chlorotoluron and isoproturon) and quantum yields using polychromatic irradiation

Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet

Standard

Investigation of the photochemistry of urea herbicides (chlorotoluron and isoproturon) and quantum yields using polychromatic irradiation. / Millet, Maurice; Palm, Wolf Ulrich; Zetzsch, Cornelius.
in: Environmental Toxicology and Chemistry, Jahrgang 17, Nr. 2, 1998, S. 258-264.

Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet

Harvard

Millet, M, Palm, WU & Zetzsch, C 1998, 'Investigation of the photochemistry of urea herbicides (chlorotoluron and isoproturon) and quantum yields using polychromatic irradiation', Environmental Toxicology and Chemistry, Jg. 17, Nr. 2, S. 258-264. https://doi.org/10.1897/1551-5028(1998)017<0258:IOTPOU>2.3.CO;2

APA

Millet, M., Palm, W. U., & Zetzsch, C. (1998). Investigation of the photochemistry of urea herbicides (chlorotoluron and isoproturon) and quantum yields using polychromatic irradiation. Environmental Toxicology and Chemistry, 17(2), 258-264. https://doi.org/10.1897/1551-5028(1998)017<0258:IOTPOU>2.3.CO;2

Vancouver

Millet M, Palm WU, Zetzsch C. Investigation of the photochemistry of urea herbicides (chlorotoluron and isoproturon) and quantum yields using polychromatic irradiation. Environmental Toxicology and Chemistry. 1998;17(2):258-264. doi: 10.1897/1551-5028(1998)017<0258:IOTPOU>2.3.CO;2

Bibtex

@article{f61016cca3794657a758c92504faca1f,
title = "Investigation of the photochemistry of urea herbicides (chlorotoluron and isoproturon) and quantum yields using polychromatic irradiation",
abstract = "This paper presents the investigation of the photochemical reaction of chlorotoluron (3-(3-chloro-4-methyl-phenyl)-1,1-dimethylurea) in CH3CN, hexane, and aqueous and buffered solutions (pH = 4, 7, and 9) and of isoproturon (3-(4-isopropylphenyl)-1,1-dimethylurea) in aqueous and buffered solutions using a polychromatic light source at a temperature of 22°C. For chlorotoluron, isosbestic points were found (with the exception of hexane as solvent) and ultraviolet spectroscopy was used to obtain kinetic data. The main photoproduct for the photolysis of chlorotoluron in aqueous solutions was identified as 3-(3-hydroxy-4-methyl-phenyl)-1,1 dimethylurea. Quantum yields found in aqueous and buffered solutions were comparable (about 0.07) and 2 times lower and 10 times higher in CH3CN and hexane, respectively. No isosbestic points were found for isoproturon, and quantum yields of about 0.004 were calculated in all solutions. Chlorotoluron and isoproturon present very low molar extinction coefficients above 290 nm, and they can be assumed to be photostable with respect to direct irradiation by sunlight.",
keywords = "Chlorotoluron, Direct photolysis, Isoproturon, Quantum yields, Chemistry",
author = "Maurice Millet and Palm, {Wolf Ulrich} and Cornelius Zetzsch",
year = "1998",
doi = "10.1897/1551-5028(1998)017<0258:IOTPOU>2.3.CO;2",
language = "English",
volume = "17",
pages = "258--264",
journal = "Environmental Toxicology and Chemistry",
issn = "0730-7268",
publisher = "Oxford University Press",
number = "2",

}

RIS

TY - JOUR

T1 - Investigation of the photochemistry of urea herbicides (chlorotoluron and isoproturon) and quantum yields using polychromatic irradiation

AU - Millet, Maurice

AU - Palm, Wolf Ulrich

AU - Zetzsch, Cornelius

PY - 1998

Y1 - 1998

N2 - This paper presents the investigation of the photochemical reaction of chlorotoluron (3-(3-chloro-4-methyl-phenyl)-1,1-dimethylurea) in CH3CN, hexane, and aqueous and buffered solutions (pH = 4, 7, and 9) and of isoproturon (3-(4-isopropylphenyl)-1,1-dimethylurea) in aqueous and buffered solutions using a polychromatic light source at a temperature of 22°C. For chlorotoluron, isosbestic points were found (with the exception of hexane as solvent) and ultraviolet spectroscopy was used to obtain kinetic data. The main photoproduct for the photolysis of chlorotoluron in aqueous solutions was identified as 3-(3-hydroxy-4-methyl-phenyl)-1,1 dimethylurea. Quantum yields found in aqueous and buffered solutions were comparable (about 0.07) and 2 times lower and 10 times higher in CH3CN and hexane, respectively. No isosbestic points were found for isoproturon, and quantum yields of about 0.004 were calculated in all solutions. Chlorotoluron and isoproturon present very low molar extinction coefficients above 290 nm, and they can be assumed to be photostable with respect to direct irradiation by sunlight.

AB - This paper presents the investigation of the photochemical reaction of chlorotoluron (3-(3-chloro-4-methyl-phenyl)-1,1-dimethylurea) in CH3CN, hexane, and aqueous and buffered solutions (pH = 4, 7, and 9) and of isoproturon (3-(4-isopropylphenyl)-1,1-dimethylurea) in aqueous and buffered solutions using a polychromatic light source at a temperature of 22°C. For chlorotoluron, isosbestic points were found (with the exception of hexane as solvent) and ultraviolet spectroscopy was used to obtain kinetic data. The main photoproduct for the photolysis of chlorotoluron in aqueous solutions was identified as 3-(3-hydroxy-4-methyl-phenyl)-1,1 dimethylurea. Quantum yields found in aqueous and buffered solutions were comparable (about 0.07) and 2 times lower and 10 times higher in CH3CN and hexane, respectively. No isosbestic points were found for isoproturon, and quantum yields of about 0.004 were calculated in all solutions. Chlorotoluron and isoproturon present very low molar extinction coefficients above 290 nm, and they can be assumed to be photostable with respect to direct irradiation by sunlight.

KW - Chlorotoluron

KW - Direct photolysis

KW - Isoproturon

KW - Quantum yields

KW - Chemistry

UR - http://www.scopus.com/inward/record.url?scp=0031908358&partnerID=8YFLogxK

U2 - 10.1897/1551-5028(1998)017<0258:IOTPOU>2.3.CO;2

DO - 10.1897/1551-5028(1998)017<0258:IOTPOU>2.3.CO;2

M3 - Journal articles

AN - SCOPUS:0031908358

VL - 17

SP - 258

EP - 264

JO - Environmental Toxicology and Chemistry

JF - Environmental Toxicology and Chemistry

SN - 0730-7268

IS - 2

ER -

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