Reactivity of neonicotinoid pesticides with singlet oxygen
The reaction kinetics and mechanisms of three neonicotinoid insecticides, imidacloprid (IMD), thiacloprid (THIA) and acetamiprid (ACT), with singlet oxygen and Rose Bengal excited triplet state is reported. The rate constants (5.5 ± 0.5) × 10⁶, (3.9 ± 1) × 10⁶, and (1.3 ± 1) × 10⁶ M⁻¹ s⁻¹ were deter...
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| Formato: | Articulo |
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2010
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/170192 |
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I19-R120-10915-1701922024-09-14T04:08:41Z http://sedici.unlp.edu.ar/handle/10915/170192 Reactivity of neonicotinoid pesticides with singlet oxygen Dell'Arciprete, María Laura Santos-Juanes, L. Arques, A. Vercher, R.F. Amat, A.M. Furlong, Jorge Javier Pedro Mártire, Daniel Osvaldo González, Mónica Cristina 2010 2024-09-13T18:19:28Z en Química Neonicotinoids Rose Bengal Singlet oxygen Sunlight Self-cleaning The reaction kinetics and mechanisms of three neonicotinoid insecticides, imidacloprid (IMD), thiacloprid (THIA) and acetamiprid (ACT), with singlet oxygen and Rose Bengal excited triplet state is reported. The rate constants (5.5 ± 0.5) × 10⁶, (3.9 ± 1) × 10⁶, and (1.3 ± 1) × 10⁶ M⁻¹ s⁻¹ were determined for the chemical reaction of singlet oxygen, and the values (4.8 ± 1) × 10⁷, (1.5 ± 1) × 10⁸, and (3.6 ± 1) × 10⁶ M⁻¹ s⁻¹ for the reactions with Rose Bengal triplet state for IMD, THIA, and ACT, respectively. The most important primary degradation product identified was 6-chloronicotinic acid. The results support a reaction mechanism involving a charge transfer reaction between the insecticides and singlet oxygen or Rose Bengal triplet state. The toxicity of the solutions towards Vibrio fischeri seems not to decrease during the early stages of the reactions. Depletion of the insecticides by singlet oxygen and naturally occurring excited states might be important abiotic pathways involved in natural waters. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas Laboratorio de Estudio de Compuestos Orgánicos Articulo Articulo http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 137-142 |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Química Neonicotinoids Rose Bengal Singlet oxygen Sunlight Self-cleaning |
| spellingShingle |
Química Neonicotinoids Rose Bengal Singlet oxygen Sunlight Self-cleaning Dell'Arciprete, María Laura Santos-Juanes, L. Arques, A. Vercher, R.F. Amat, A.M. Furlong, Jorge Javier Pedro Mártire, Daniel Osvaldo González, Mónica Cristina Reactivity of neonicotinoid pesticides with singlet oxygen |
| topic_facet |
Química Neonicotinoids Rose Bengal Singlet oxygen Sunlight Self-cleaning |
| description |
The reaction kinetics and mechanisms of three neonicotinoid insecticides, imidacloprid (IMD), thiacloprid (THIA) and acetamiprid (ACT), with singlet oxygen and Rose Bengal excited triplet state is reported. The rate constants (5.5 ± 0.5) × 10⁶, (3.9 ± 1) × 10⁶, and (1.3 ± 1) × 10⁶ M⁻¹ s⁻¹ were determined for the chemical reaction of singlet oxygen, and the values (4.8 ± 1) × 10⁷, (1.5 ± 1) × 10⁸, and (3.6 ± 1) × 10⁶ M⁻¹ s⁻¹ for the reactions with Rose Bengal triplet state for IMD, THIA, and ACT, respectively. The most important primary degradation product identified was 6-chloronicotinic acid. The results support a reaction mechanism involving a charge transfer reaction between the insecticides and singlet oxygen or Rose Bengal triplet state. The toxicity of the solutions towards Vibrio fischeri seems not to decrease during the early stages of the reactions. Depletion of the insecticides by singlet oxygen and naturally occurring excited states might be important abiotic pathways involved in natural waters. |
| format |
Articulo Articulo |
| author |
Dell'Arciprete, María Laura Santos-Juanes, L. Arques, A. Vercher, R.F. Amat, A.M. Furlong, Jorge Javier Pedro Mártire, Daniel Osvaldo González, Mónica Cristina |
| author_facet |
Dell'Arciprete, María Laura Santos-Juanes, L. Arques, A. Vercher, R.F. Amat, A.M. Furlong, Jorge Javier Pedro Mártire, Daniel Osvaldo González, Mónica Cristina |
| author_sort |
Dell'Arciprete, María Laura |
| title |
Reactivity of neonicotinoid pesticides with singlet oxygen |
| title_short |
Reactivity of neonicotinoid pesticides with singlet oxygen |
| title_full |
Reactivity of neonicotinoid pesticides with singlet oxygen |
| title_fullStr |
Reactivity of neonicotinoid pesticides with singlet oxygen |
| title_full_unstemmed |
Reactivity of neonicotinoid pesticides with singlet oxygen |
| title_sort |
reactivity of neonicotinoid pesticides with singlet oxygen |
| publishDate |
2010 |
| url |
http://sedici.unlp.edu.ar/handle/10915/170192 |
| work_keys_str_mv |
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