Molecular Encapsulation of Herbicide Terbuthylazine in Native and Modified β-Cyclodextrin
Joint Authors
Garrido, E. Manuela
Rodrigues, Daniela
Milhazes, Nuno
Borges, Fernanda
Garrido, Jorge
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-04-09
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
The herbicide terbuthylazine (TBA) is widely used for preemergence or postemergence control of many grass and broadleaf weeds and has, besides other issues, a poor aqueous solubility profile that results in reduced bioavailability.
Cyclodextrins and modified cyclodextrins were considered, among other substances, appropriate agents for improving pesticide water solubility.
Therefore, the inclusion complex formation of terbuthylazine with β-cyclodextrin (β-CD) and hydroxypropyl-β-cyclodextrin (HP-β-CD) was studied to attain its aqueous solubility enhancement.
Their characterization was accomplished with different analytical techniques, namely, by UV-Vis, DSC, FTIR, and 1H NMR.
From the analysis of the complexation performance of the herbicide it was concluded that the interaction of terbuthylazine with CDs leads to the formation of inclusion complexes with a stoichiometry of 1 : 1.
The association constants of the TBA/β-CD and TBA/HP-β-CD complexes were determined by UV.
The mean values obtained for the stability constants are 460.4 ± 26.5 and 532.1 ± 27.6 to TBA/β-CD and TBA/HP-β-CD, respectively.
1H NMR data corroborate the formation of the TBA/β-CD and TBA/HP-β-CD complexes synthesized by the kneading method.
A formulation incorporating TBA cyclodextrin complexes might lead to an improvement in terbuthylazine bioavailability.
The development of TBA-CD formulations may be interesting since it would enable, through their inclusion into the hydrophobic cavity of CDs, enhancement of solubility, bioavailability, and stability of the herbicide.
American Psychological Association (APA)
Garrido, E. Manuela& Rodrigues, Daniela& Milhazes, Nuno& Borges, Fernanda& Garrido, Jorge. 2017. Molecular Encapsulation of Herbicide Terbuthylazine in Native and Modified β-Cyclodextrin. Journal of Chemistry،Vol. 2017, no. 2017, pp.1-9.
https://search.emarefa.net/detail/BIM-1172385
Modern Language Association (MLA)
Garrido, E. Manuela…[et al.]. Molecular Encapsulation of Herbicide Terbuthylazine in Native and Modified β-Cyclodextrin. Journal of Chemistry No. 2017 (2017), pp.1-9.
https://search.emarefa.net/detail/BIM-1172385
American Medical Association (AMA)
Garrido, E. Manuela& Rodrigues, Daniela& Milhazes, Nuno& Borges, Fernanda& Garrido, Jorge. Molecular Encapsulation of Herbicide Terbuthylazine in Native and Modified β-Cyclodextrin. Journal of Chemistry. 2017. Vol. 2017, no. 2017, pp.1-9.
https://search.emarefa.net/detail/BIM-1172385
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1172385