Inclusion Complex of n-Octyl β-d-Glucopyranoside and α-Cyclodextrin in Aqueous Solutions:  Thermodynamic and Structural Characterization

Langmuir ◽  
2008 ◽  
Vol 24 (7) ◽  
pp. 3140-3149 ◽  
Author(s):  
Valérie Bernat ◽  
Catherine Ringard-Lefebvre ◽  
Geneviève Le Bas ◽  
Bruno Perly ◽  
Florence Djedaïni-Pilard ◽  
...  
Keyword(s):  
Inclusion Complex ◽  
Aqueous Solutions ◽  
Structural Characterization

scholarly journals Inclusion Complex of n-Octyl β-d-Glucopyranoside and α-Cyclodextrin in Aqueous Solutions: Thermodynamic and Structural Characterization

Langmuir ◽  
2008 ◽  
Vol 24 (19) ◽  
pp. 11322-11322
Author(s):  
Valérie Bernat ◽  
Catherine Ringard-Lefèbvre ◽  
Geneviève Le Bas ◽  
Bruno Perly ◽  
Florence Djedaïni-Pilard ◽  
...  
Keyword(s):  
Inclusion Complex ◽  
Aqueous Solutions ◽  
Structural Characterization

In Situ Structural Characterization of Ferric Iron Dimers in Aqueous Solutions: Identification of μ-Oxo Species

2013 ◽  
Vol 52 (12) ◽  
pp. 6788-6797 ◽  
Author(s):  
Mengqiang Zhu ◽  
Brendan W. Puls ◽  
Cathrine Frandsen ◽  
James D. Kubicki ◽  
Hengzhong Zhang ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Structural Characterization ◽  
Ferric Iron

Structural characterization of environmentally relevant ternary uranyl citrate complexes present in aqueous solutions and solid state materials

2015 ◽  
Vol 44 (6) ◽  
pp. 2597-2605 ◽  
Author(s):  
Madeline Basile ◽  
Daniel K. Unruh ◽  
Erin Flores ◽  
Adam Johns ◽  
Tori Z. Forbes
Keyword(s):  
Solid State ◽  
Aqueous Solutions ◽  
Structural Characterization ◽  
Solid State Materials ◽  
Polynuclear Clusters ◽  
Insight Into

Structural characterization of U(vi) : (Al(iii), Fe(iii)) : citrate complexes provides insight into the formation of polynuclear clusters present in environmentally-relevant aqueous solutions.

Host-guest inclusion systems of tetra(alkyl)resorcin [4]arenes with choline in DMSO: Dynamic NMR studies and X-ray structural characterization of the 1:1 inclusion complex

2019 ◽  
Vol 1198 ◽  
pp. 126846 ◽  
Author(s):  
Astrid Velásquez-Silva ◽  
Roger Sarmiento Forero ◽  
Edilma Sanabria ◽  
Adrián Pérez-Redondo ◽  
Mauricio Maldonado
Keyword(s):  
Inclusion Complex ◽  
Structural Characterization ◽  
Dynamic Nmr ◽  
Nmr Studies ◽  
X Ray

On the Interaction of Ionic Liquid 1-Butyl-3-Methylimidazolium Hexafluorophosphate with β-Cyclodextrin in Aqueous Solutions

2010 ◽  
Vol 224 (06) ◽  
pp. 893-906 ◽  
Author(s):  
Jakub Rak ◽  
Daniel Ondo ◽  
Marcela Tkadlecova ◽  
Vladimir Dohnal
Keyword(s):  
Ionic Liquid ◽  
Inclusion Complex ◽  
Aqueous Solutions ◽  
Room Temperature ◽  
Inorganic Salt ◽  
Formation Enthalpy ◽  
Titration Calorimetry ◽  
Imidazolium Cation ◽  
Phosphorus Nmr ◽  
Enthalpy And Entropy

AbstractThe formation of inclusion complex of β-cyclodextrin (β-CD) with the hydrophobic room temperature ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate (bmimPF6) in aqueous solutions was studied at 298.15 K using 1H, 13C, 19F and 31P NMR spectroscopy and isothermal titration calorimetry (ITC). Currently, there is a disagreement in the literature concerning the structure of the complex formed. In contrast to some results published recently in the literature, we found no reasonable support for β-CD to form an inclusion complex with 1-butyl-3-methyl-imidazolium cation of bmimPF6 in water. Our measurements on bmimPF6, the ionic liquid 1-butyl-3-methylimidazolium chloride (bmimCl), and the inorganic salt potassium hexafluorophosphate (KPF6) consistently support the formation of a weak 1:1 inclusion complex of β-CD with hexafluorophosphate anion instead of the bmim+ cation. The thermodynamic parameters of the respective complexation were calculated. The binding constant was evaluated from ITC and proton, fluorine and phosphorus NMR measurements, and the complex formation enthalpy and entropy were obtained from ITC.

Chemical controls on uranyl citrate speciation and the self-assembly of nanoscale macrocycles and sandwich complexes in aqueous solutions

2015 ◽  
Vol 51 (25) ◽  
pp. 5306-5309 ◽  
Author(s):  
M. Basile ◽  
D. K. Unruh ◽  
K. Gojdas ◽  
E. Flores ◽  
L. Streicher ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Structural Characterization ◽  
Self Assembly ◽  
Spectroscopic Studies ◽  
The Self ◽  
Sandwich Complexes

Speciation and molecular self-assembly of uranyl citrate complexes have been determined based upon structural characterization and spectroscopic studies.

Energetics of the encapsulation of o-, m-, and p-hydroxybenzoic acids by β-cyclodextrin and its methylated and hydroxypropylated derivatives in aqueous solution

1999 ◽  
Vol 77 (3) ◽  
pp. 348-355 ◽  
Author(s):  
Elena Junquera ◽  
Valentin G Baonza ◽  
Emilio Aicart
Keyword(s):  
Aqueous Solution ◽  
Inclusion Complex ◽  
Aqueous Solutions ◽  
Inclusion Complexes ◽  
Binding Constant ◽  
Substituent Effect ◽  
Binding Constants ◽  
Hydroxybenzoic Acid ◽  
Guest Molecules ◽  
Hydroxybenzoic Acids

A fully computerized potentiometric technique has been used to analyze the energetics of the encapsulation of o-, m-, and p-hydroxybenzoic acids by β-cyclodextrin (β-CD) and (or) two of its most used derivatives: 2,6-di-O-methyl-β-cyclodextrin (DIMEB) and hydroxypropyl-β-cyclodextrin (HPBCD). The study has been carried out by measuring the pH of aqueous solutions of the three hydroxyacids in the absence of cyclodextrin at 25°C, and in the presence of cyclodextrin at several temperatures ranging from 15 to 40°C, keeping constant the concentration of the guest. The dissociation constant of the acids and the binding constants of the inclusion complexes formed have been simultaneously determined at all the temperatures by using a model previously derived by us. The carboxylic forms have been found to bind the CD with higher affinities than the carboxylate partners do, irrespective of the temperature, the cyclodextrin used, and the position of the substituents on the guest molecules. The formation of the inclusion complexes studied in this work has been found to be enthalpy driven, with a favorable enthalpic term dominant over an unfavorable entropic one. The effect of the substituents of both guest and host molecules on the thermodynamics of the inclusion processes has been analyzed. Key words: binding constant, β-cyclodextrin, hydroxybenzoic acid, inclusion complex, substituent effect.

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