This study describes photolysis of 1 × 10–4 M methomyl solution in deionized water and in eleven organic solvents, both polar and nonpolar: methanol, ethanol, n-propanol, isopropanol, sec-butanol, tert-butanol, isobutanol, isopentanol, n-hexane, acetonitrile, and dichloromethane. Photolysis of methomyl at 254 nm was performed using Osram mercury lamp (6 × 8 W) by exposing to irradiation for five hours. All photolytic methomyl reactions were studied by UV/Vis spectroscopy within a wavelength range of 190−300 nm (Spectrum Mode), and at 233.4 nm (Quantitative Mode), while the rate of photodecomposition of methomyl was measured using UV spectroscopy and HPLC. In order to get better insight in the photolysis of methomyl, a liquid chromatography-mass spectrometry (LC–MSn) was used. The rate of methomyl photolysis was solvent-specific and the following reaction rate order was established: deionized water > tert-butanol > n-hexane > sec-butanol > ethanol > isopentanol > isobutanol > isopropano...l > methanol > acetonitrile > dichloromethane > n-propanol. Both nonspecific and specific solvent-solute interactions contribute mutually to the differences in the obtained quantum yields. Results of quantum chemical calculations, using CBS-QB3 method, provided insights into the solvent effects on both ground and excited state. The LC/MSn analysis showed the formation of several photolytic products.
TY - JOUR
AU - Tomašević, Anđelka
AU - Mijin, Dušan
AU - Radišić, Marina
AU - Prlainović, Nevena
AU - Cvijetić, Ilija
AU - Kovačević, Danijela V.
AU - Marinković, Aleksandar
PY - 2020
UR - https://cherry.chem.bg.ac.rs/handle/123456789/3832
AB - This study describes photolysis of 1 × 10–4 M methomyl solution in deionized water and in eleven organic solvents, both polar and nonpolar: methanol, ethanol, n-propanol, isopropanol, sec-butanol, tert-butanol, isobutanol, isopentanol, n-hexane, acetonitrile, and dichloromethane. Photolysis of methomyl at 254 nm was performed using Osram mercury lamp (6 × 8 W) by exposing to irradiation for five hours. All photolytic methomyl reactions were studied by UV/Vis spectroscopy within a wavelength range of 190−300 nm (Spectrum Mode), and at 233.4 nm (Quantitative Mode), while the rate of photodecomposition of methomyl was measured using UV spectroscopy and HPLC. In order to get better insight in the photolysis of methomyl, a liquid chromatography-mass spectrometry (LC–MSn) was used. The rate of methomyl photolysis was solvent-specific and the following reaction rate order was established: deionized water > tert-butanol > n-hexane > sec-butanol > ethanol > isopentanol > isobutanol > isopropanol > methanol > acetonitrile > dichloromethane > n-propanol. Both nonspecific and specific solvent-solute interactions contribute mutually to the differences in the obtained quantum yields. Results of quantum chemical calculations, using CBS-QB3 method, provided insights into the solvent effects on both ground and excited state. The LC/MSn analysis showed the formation of several photolytic products.
PB - Elsevier
T2 - Journal of Photochemistry and Photobiology A: Chemistry
T1 - Photolysis of insecticide methomyl in various solvents: An experimental and theoretical study
VL - 391
SP - e112366
DO - 10.1016/j.jphotochem.2020.112366
ER -
@article{
author = "Tomašević, Anđelka and Mijin, Dušan and Radišić, Marina and Prlainović, Nevena and Cvijetić, Ilija and Kovačević, Danijela V. and Marinković, Aleksandar",
year = "2020",
abstract = "This study describes photolysis of 1 × 10–4 M methomyl solution in deionized water and in eleven organic solvents, both polar and nonpolar: methanol, ethanol, n-propanol, isopropanol, sec-butanol, tert-butanol, isobutanol, isopentanol, n-hexane, acetonitrile, and dichloromethane. Photolysis of methomyl at 254 nm was performed using Osram mercury lamp (6 × 8 W) by exposing to irradiation for five hours. All photolytic methomyl reactions were studied by UV/Vis spectroscopy within a wavelength range of 190−300 nm (Spectrum Mode), and at 233.4 nm (Quantitative Mode), while the rate of photodecomposition of methomyl was measured using UV spectroscopy and HPLC. In order to get better insight in the photolysis of methomyl, a liquid chromatography-mass spectrometry (LC–MSn) was used. The rate of methomyl photolysis was solvent-specific and the following reaction rate order was established: deionized water > tert-butanol > n-hexane > sec-butanol > ethanol > isopentanol > isobutanol > isopropanol > methanol > acetonitrile > dichloromethane > n-propanol. Both nonspecific and specific solvent-solute interactions contribute mutually to the differences in the obtained quantum yields. Results of quantum chemical calculations, using CBS-QB3 method, provided insights into the solvent effects on both ground and excited state. The LC/MSn analysis showed the formation of several photolytic products.",
publisher = "Elsevier",
journal = "Journal of Photochemistry and Photobiology A: Chemistry",
title = "Photolysis of insecticide methomyl in various solvents: An experimental and theoretical study",
volume = "391",
pages = "e112366",
doi = "10.1016/j.jphotochem.2020.112366"
}
Tomašević, A., Mijin, D., Radišić, M., Prlainović, N., Cvijetić, I., Kovačević, D. V.,& Marinković, A.. (2020). Photolysis of insecticide methomyl in various solvents: An experimental and theoretical study. in Journal of Photochemistry and Photobiology A: Chemistry
Elsevier., 391, e112366.
https://doi.org/10.1016/j.jphotochem.2020.112366
Tomašević A, Mijin D, Radišić M, Prlainović N, Cvijetić I, Kovačević DV, Marinković A. Photolysis of insecticide methomyl in various solvents: An experimental and theoretical study. in Journal of Photochemistry and Photobiology A: Chemistry. 2020;391:e112366.
doi:10.1016/j.jphotochem.2020.112366 .
Tomašević, Anđelka, Mijin, Dušan, Radišić, Marina, Prlainović, Nevena, Cvijetić, Ilija, Kovačević, Danijela V., Marinković, Aleksandar, "Photolysis of insecticide methomyl in various solvents: An experimental and theoretical study" in Journal of Photochemistry and Photobiology A: Chemistry, 391 (2020):e112366,
https://doi.org/10.1016/j.jphotochem.2020.112366 . .
