Thermodynamics of formation of β-cyclodextrin inclusion complexes with four series of surfactant homologs

Mária Benko, Réka Tabajdi, Z. Király

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We report on a titration microcalorimetric study of the formation of β-cyclodextrin inclusion complexes with the members of series of anionic, cationic, and nonionic surfactant homologs containing even numbers of carbon atoms in the alkyl chains. n-Alkyltrimethylammonium bromides (CxTAB, x = 6-16), sodium n-alkyl sulfates (SCxS, x = 6-12), sodium n-alkanesulfonates (SCxSN, x = 6-12), and N,N-dimethylalkylamine-N- oxides (DCxAO, x = 8-12) were selected for use. The stoichiometry, the binding constant, and the changes in enthalpy, entropy, and Gibbs free energy of the complexation reactions were determined at 298 K. It was found in each case that the complexation is favored by both the enthalpy and the entropy changes and that the thermodynamics of the process is affected far more strongly by the length of the alkyl chain than by the nature of the headgroup.

Original languageEnglish
Pages (from-to)969-976
Number of pages8
JournalJournal of Thermal Analysis and Calorimetry
Volume112
Issue number2
DOIs
Publication statusPublished - May 2013

Fingerprint

Cyclodextrins
Complexation
Surface-Active Agents
Enthalpy
Alkanesulfonates
Entropy
enthalpy
Sodium
surfactants
sodium
Thermodynamics
inclusions
entropy
thermodynamics
Anionic surfactants
Cationic surfactants
Nonionic surfactants
Gibbs free energy
Bromides
Titration

Keywords

  • β-Cyclodextrin
  • Inclusion complexes
  • Isothermal titration microcalorimetry
  • Surfactants
  • Thermodynamics

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics

Cite this

Thermodynamics of formation of β-cyclodextrin inclusion complexes with four series of surfactant homologs. / Benko, Mária; Tabajdi, Réka; Király, Z.

In: Journal of Thermal Analysis and Calorimetry, Vol. 112, No. 2, 05.2013, p. 969-976.

Research output: Contribution to journalArticle

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