Divinyl sulfone cross-linked cyclodextrin-based polymeric materials: synthesis and applications as sorbents and encapsulating agents

Molecules. 2015 Feb 19;20(3):3565-81. doi: 10.3390/molecules20033565.

Abstract

The aim of this study was to evaluate the crosslinking abilities of divinyl sulfone (DVS) for the preparation of novel water-insoluble cyclodextrin-based polymers (CDPs) capable of forming inclusion complexes with different guest molecules. Reaction of DVS with native α-cyclodextrin (α-CD), β-cyclodextrin (β-CD) and/or starch generates a variety of homo- and hetero-CDPs with different degrees of crosslinking as a function of the reactants' stoichiometric ratio. The novel materials were characterized by powder X-ray diffraction, electron microscopy and for their sorption of phenol and 4-nitrophenol. They were further evaluated as sorbents with phenolic pollutants (bisphenol A and β-naphthol) and bioactive compounds (the hormone progesterone and curcumin). Data obtained from the inclusion experiments show that the degree of cross-linking has a minor influence on the yield of inclusion complex formation and highlight the important role of the CDs, supporting a sorption process based on the formation of inclusion complexes. In general, the inclusion processes are better described by a Freundlich isotherm although an important number of them can also be fitted to the Langmuir isotherm with R2 ≥ 0.9, suggesting a sorption onto a monolayer of homogeneous sites.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adsorption
  • Benzhydryl Compounds / isolation & purification
  • Benzhydryl Compounds / metabolism
  • Cross-Linking Reagents / pharmacology*
  • Curcumin / isolation & purification
  • Curcumin / metabolism
  • Cyclodextrins / chemistry*
  • Hydrogen-Ion Concentration
  • Naphthols / isolation & purification
  • Naphthols / metabolism
  • Nitrophenols / isolation & purification
  • Nitrophenols / metabolism
  • Phenols / isolation & purification
  • Phenols / metabolism
  • Polymers / chemistry*
  • Progesterone / isolation & purification
  • Progesterone / metabolism
  • Starch / chemistry*
  • Sulfones / chemistry*
  • X-Ray Diffraction

Substances

  • Benzhydryl Compounds
  • Cross-Linking Reagents
  • Cyclodextrins
  • Naphthols
  • Nitrophenols
  • Phenols
  • Polymers
  • Sulfones
  • Progesterone
  • divinyl sulfone
  • Starch
  • Curcumin
  • bisphenol A
  • 2-naphthol
  • 4-nitrophenol