Effect of end-capping and surface coverage on the mechanism of solvent adsorption

Szymon Bocian, Péter Vajda, A. Felinger, Bogusław Buszewski

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Adsorption of acetonitrile and methanol was measured on non-endcapped and endcapped octadecyl stationary phases. The results enabled us to characterize the effect of end-capping on the adsorption of the organic modifiers. Our results clearly demonstrate how the endcapping groups modify the chromatographic properties of adsorbents. Differences between solvent adsorption mechanisms are also discussed. Adsorption of acetonitrile is governed by hydrophobic effects whereas methanol is adsorbed by the organic ligand by a hydrophobic interaction and by the residual silanols by hydrogen-bond formation and dipole-dipole interactions.

Original languageEnglish
JournalChromatographia
Volume71
Issue numberSUPPL. 1
DOIs
Publication statusPublished - Jun 2010

Fingerprint

Adsorption
Methanol
Hydrophobic and Hydrophilic Interactions
Adsorbents
Hydrogen
Hydrogen bonds
Ligands
acetonitrile

Keywords

  • Bonded stationary phase
  • Column liquid chromatography
  • End-capping
  • Excess isotherm
  • Solvent adsorption

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Clinical Biochemistry
  • Organic Chemistry

Cite this

Effect of end-capping and surface coverage on the mechanism of solvent adsorption. / Bocian, Szymon; Vajda, Péter; Felinger, A.; Buszewski, Bogusław.

In: Chromatographia, Vol. 71, No. SUPPL. 1, 06.2010.

Research output: Contribution to journalArticle

Bocian, Szymon ; Vajda, Péter ; Felinger, A. ; Buszewski, Bogusław. / Effect of end-capping and surface coverage on the mechanism of solvent adsorption. In: Chromatographia. 2010 ; Vol. 71, No. SUPPL. 1.
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