Influence of Hydroxypropyl-β-Cyclodextrin on the Photostability of Fungicide Pyrimethanil
Pesticides continue to play an important role in pest management. However, the intensive pesticide application has triggered several environment negative effects that cannot be disregarded. In this study, the inclusion complex of pyrimethanil with HP-β-CD has been prepared and characterized by proto...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2014/489873 |
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| author | Carlos Fernandes Igor Encarnação Alexandra Gaspar Jorge Garrido Fernanda Borges E. Manuela Garrido |
| author_facet | Carlos Fernandes Igor Encarnação Alexandra Gaspar Jorge Garrido Fernanda Borges E. Manuela Garrido |
| author_sort | Carlos Fernandes |
| collection | DOAJ |
| description | Pesticides continue to play an important role in pest management. However, the intensive pesticide application has triggered several environment negative effects that cannot be disregarded. In this study, the inclusion complex of pyrimethanil with HP-β-CD has been prepared and characterized by proton nuclear magnetic resonance spectroscopy. The formation of the pyrimethanil/HP-β-CD inclusion complex increased the aqueous solubility of this fungicide around five times. To assess the influence of microencapsulation on the environmental photostability of the fungicide, the photochemical degradation of pyrimethanil and pyrimethanil/HP-β-CD inclusion complex has been investigated in different aqueous media such as ultrapure and river water under simulated solar irradiation. The studies allow concluding that pyrimethanil/HP-β-CD inclusion complex increases significantly the photostability of the fungicide in aqueous solutions, especially in natural water. Actually, the half-life of pyrimethanil/HP-β-CD inclusion complex was increased approximately by a factor of four when compared to the free fungicide. The overall results point out that pyrimethanil can be successfully encapsulated by HP-β-CD, a process that can improve its solubility and photostability properties. |
| format | Article |
| id | doaj-art-944dac5ae5f449dfbacadaa1a6e18838 |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-944dac5ae5f449dfbacadaa1a6e188382025-02-03T06:12:33ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2014-01-01201410.1155/2014/489873489873Influence of Hydroxypropyl-β-Cyclodextrin on the Photostability of Fungicide PyrimethanilCarlos Fernandes0Igor Encarnação1Alexandra Gaspar2Jorge Garrido3Fernanda Borges4E. Manuela Garrido5Departamento de Engenharia Química, Instituto Superior de Engenharia do Porto (ISEP), Instituto Politécnico do Porto, 4200-072 Porto, PortugalDepartamento de Engenharia Química, Instituto Superior de Engenharia do Porto (ISEP), Instituto Politécnico do Porto, 4200-072 Porto, PortugalDepartamento de Engenharia Química, Instituto Superior de Engenharia do Porto (ISEP), Instituto Politécnico do Porto, 4200-072 Porto, PortugalDepartamento de Engenharia Química, Instituto Superior de Engenharia do Porto (ISEP), Instituto Politécnico do Porto, 4200-072 Porto, PortugalCIQ/Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, PortugalDepartamento de Engenharia Química, Instituto Superior de Engenharia do Porto (ISEP), Instituto Politécnico do Porto, 4200-072 Porto, PortugalPesticides continue to play an important role in pest management. However, the intensive pesticide application has triggered several environment negative effects that cannot be disregarded. In this study, the inclusion complex of pyrimethanil with HP-β-CD has been prepared and characterized by proton nuclear magnetic resonance spectroscopy. The formation of the pyrimethanil/HP-β-CD inclusion complex increased the aqueous solubility of this fungicide around five times. To assess the influence of microencapsulation on the environmental photostability of the fungicide, the photochemical degradation of pyrimethanil and pyrimethanil/HP-β-CD inclusion complex has been investigated in different aqueous media such as ultrapure and river water under simulated solar irradiation. The studies allow concluding that pyrimethanil/HP-β-CD inclusion complex increases significantly the photostability of the fungicide in aqueous solutions, especially in natural water. Actually, the half-life of pyrimethanil/HP-β-CD inclusion complex was increased approximately by a factor of four when compared to the free fungicide. The overall results point out that pyrimethanil can be successfully encapsulated by HP-β-CD, a process that can improve its solubility and photostability properties.http://dx.doi.org/10.1155/2014/489873 |
| spellingShingle | Carlos Fernandes Igor Encarnação Alexandra Gaspar Jorge Garrido Fernanda Borges E. Manuela Garrido Influence of Hydroxypropyl-β-Cyclodextrin on the Photostability of Fungicide Pyrimethanil International Journal of Photoenergy |
| title | Influence of Hydroxypropyl-β-Cyclodextrin on the Photostability of Fungicide Pyrimethanil |
| title_full | Influence of Hydroxypropyl-β-Cyclodextrin on the Photostability of Fungicide Pyrimethanil |
| title_fullStr | Influence of Hydroxypropyl-β-Cyclodextrin on the Photostability of Fungicide Pyrimethanil |
| title_full_unstemmed | Influence of Hydroxypropyl-β-Cyclodextrin on the Photostability of Fungicide Pyrimethanil |
| title_short | Influence of Hydroxypropyl-β-Cyclodextrin on the Photostability of Fungicide Pyrimethanil |
| title_sort | influence of hydroxypropyl β cyclodextrin on the photostability of fungicide pyrimethanil |
| url | http://dx.doi.org/10.1155/2014/489873 |
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