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Exploring the Recognition Mechanism of Surfactant-Cyclodextrin Complex Formation: Insights from SPR Studies on Temperature and Ionic Liquid Influence.
Araujo Marques, Isabela; Campos de Paula, Hauster Maximiler; Fonseca Silva, Camilla; Soares Nascimento, Clebio; Coelho, Yara Luiza; Dos Santos Pires, Ana Clarissa; Mendes da Silva, Luis Henrique.
Afiliação
  • Araujo Marques I; Advanced Thermokinetics of Molecular Systems (ATOMS) Group, Chemistry Department, Federal University of Viçosa, Viçosa-MG 36570-000, Brazil.
  • Campos de Paula HM; Advanced Thermokinetics of Molecular Systems (ATOMS) Group, Chemistry Department, Federal University of Viçosa, Viçosa-MG 36570-000, Brazil.
  • Fonseca Silva C; Theoretical and Computational Chemistry (LQTC) Laboratory, Department of Natural Sciences (DCNAT), Federal University of São João Del Rei, Dom Bosco Campus, São João Del Rei-MG 36301-160, Brazil.
  • Soares Nascimento C; Theoretical and Computational Chemistry (LQTC) Laboratory, Department of Natural Sciences (DCNAT), Federal University of São João Del Rei, Dom Bosco Campus, São João Del Rei-MG 36301-160, Brazil.
  • Coelho YL; Colloid Chemistry Group, Chemistry Institute, Federal University of Alfenas, Alfenas-MG 37130-000, Brazil.
  • Dos Santos Pires AC; Applied Molecular Thermodynamic (THERMA), Food Technology Department, Federal University of Viçosa, Viçosa-MG 36570-000, Brazil.
  • Mendes da Silva LH; Advanced Thermokinetics of Molecular Systems (ATOMS) Group, Chemistry Department, Federal University of Viçosa, Viçosa-MG 36570-000, Brazil.
J Phys Chem B ; 128(39): 9604-9612, 2024 Oct 03.
Article em En | MEDLINE | ID: mdl-39302877
ABSTRACT
This study examines the kinetics and thermodynamics of the inclusion complex (IC) formation between sodium dodecylbenzenesulfonate (SDBS) and amine-modified ß-cyclodextrin (ßCD-NH2) using surface plasmon resonance (SPR) and theoretical analysis. We determined a binding constant of 103 L mol-1 for the thermodynamically stable complex ([ßCD-NH2/SDBS]°) within the temperature range of 285.2-301.2 K. The thermodynamic analysis revealed a transition from entropy-driven to enthalpy-driven behavior with increasing temperature. The rate constant for IC formation was approximately 102 M-1 s-1, with the residence time decreasing from 14.08 s at 285.2 K to 6.13 s at 301.2 K. We observed the formation of an activated complex ([ßCD-NH2/SDBS]‡), with energetic parameters indicating temperature dependence. At 285.2 K, the activated enthalpy change was positive, while at 301.2 K, it was negative. The dissociation energetic parameters remained temperature-independent. Additionally, increasing concentrations of the ionic liquid 1-butyl-3-methylimidazolium chloride influenced the SDBS tail's conformation and penetration into the ßCD-NH2 cavity at the activated state. These findings provide insights into the complexation mechanism and the effects of the temperature and ionic liquids on IC formation.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: J Phys Chem B Assunto da revista: QUIMICA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: J Phys Chem B Assunto da revista: QUIMICA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos