2018
DOI: 10.1007/s10847-018-0782-4
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Investigation of indole chalcones encapsulation in β-cyclodextrin: determination of stoichiometry, binding constants and thermodynamic parameters

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Cited by 10 publications
(2 citation statements)
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“…Additionally, the complex formation constant ( K f ) can be evaluated using the mathematical relationship given as: K f = (A/A m )/[1- (A/A m )] 2 C for 1:1 stoichiometry and K f = (A/A m )/4C 2 [1- (A/A m )] 3 for 1:2 stoichiometry, where; A is the observed maximum absorbance, A m is the absorbance obtained from the extrapolation of the two lines obtained from Job's continuous variation curve and C is the initial molar concentration of study metal ion [ 31 , 32 ]. Moreover, using the relationship; ΔG = - RTln K ; Gibbs free energy (ΔG, kJ mol −1 ) of the metal complexes formation can be estimated where, R is the gas constant (equal to 8.314 J mol −1 K −1 ), T is the temperature in Kelvin and K is the determined stability constant [ 33 ].
Figure 6 The determination of stoichiometry of HGAT – metal ions interaction in solution by Job's method: (a) Co(II)-HGAT interaction, (b) Ni(II)- HGAT interaction and (c) La(III)-HGAT interaction.
…”
Section: Resultsmentioning
confidence: 99%
“…Additionally, the complex formation constant ( K f ) can be evaluated using the mathematical relationship given as: K f = (A/A m )/[1- (A/A m )] 2 C for 1:1 stoichiometry and K f = (A/A m )/4C 2 [1- (A/A m )] 3 for 1:2 stoichiometry, where; A is the observed maximum absorbance, A m is the absorbance obtained from the extrapolation of the two lines obtained from Job's continuous variation curve and C is the initial molar concentration of study metal ion [ 31 , 32 ]. Moreover, using the relationship; ΔG = - RTln K ; Gibbs free energy (ΔG, kJ mol −1 ) of the metal complexes formation can be estimated where, R is the gas constant (equal to 8.314 J mol −1 K −1 ), T is the temperature in Kelvin and K is the determined stability constant [ 33 ].
Figure 6 The determination of stoichiometry of HGAT – metal ions interaction in solution by Job's method: (a) Co(II)-HGAT interaction, (b) Ni(II)- HGAT interaction and (c) La(III)-HGAT interaction.
…”
Section: Resultsmentioning
confidence: 99%
“…On the other hand, the release of the guest molecule from the complex becomes difficult when lgK is over 4 [17]. The stability constants of most CD-based complexes decreased as temperature elevated [18,19]. However, the two OL inclusion complexes did not exhibit such trend.…”
Section: Phase Solubility Diagramsmentioning
confidence: 97%