Formation of inclusion complexes and controlled release of atrazine using free or silica-anchored β-cyclodextrin

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorCarvalho, Lucas Bragança de-
Autor(es): dc.creatorPinto, Luciana de Matos Alves-
Data de aceite: dc.date.accessioned2026-02-09T12:45:38Z-
Data de disponibilização: dc.date.available2026-02-09T12:45:38Z-
Data de envio: dc.date.issued2020-02-06-
Data de envio: dc.date.issued2020-02-06-
Data de envio: dc.date.issued2012-12-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/38960-
Fonte completa do material: dc.identifierhttps://link.springer.com/article/10.1007/s10847-012-0125-9-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1167728-
Descrição: dc.descriptionImmobilization of cyclodextrin on the surface of silica was performed using citric acid as the bonding agent. Inclusion complexes of atrazine with free (CD) or anchored (CDSI) β-cyclodextrin were prepared and then characterized using infrared spectroscopy, X-ray diffraction and differential scanning calorimetry. The complexation reaction showed first order kinetics, with a rate constant (k) of 8.72 × 10−3 min−1. There was a rapid increase of absorbance in the first 40 min, followed by attainment of equilibrium after ~2 h. The stoichiometry of the reaction was 1:1, with both free and anchored β-cyclodextrin increasing the solubilization of atrazine in an aqueous medium (by around 1.5 and 3.4 times, respectively). The association constant (K a) of the complex was 28.93 L mol−1 using CD and 130.68 L mol−1 using CDSI. In release tests, 62% of the atrazine complexed with CDSI or β-CD was released after 40 h, while 83% of free atrazine was released during the same period.-
Idioma: dc.languageen-
Publicador: dc.publisherSpringer Nature-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceJournal of Inclusion Phenomena and Macrocyclic Chemistry-
Palavras-chave: dc.subjectCyclodextrin-
Palavras-chave: dc.subjectSilica-
Palavras-chave: dc.subjectFunctionalization-
Palavras-chave: dc.subjectInclusion complex-
Palavras-chave: dc.subjectHerbicides-
Palavras-chave: dc.subjectControlled release-
Palavras-chave: dc.subjectCiclodextrina-
Palavras-chave: dc.subjectHerbicidas-
Título: dc.titleFormation of inclusion complexes and controlled release of atrazine using free or silica-anchored β-cyclodextrin-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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