Issue 3, 2017

Adsorption of perfluorocarboxylic acids at the silica surface

Abstract

Water molecules may force the hydrophobic perfluoroalkyl chain of perfluorocarboxylic acids (PFCAs) to aggregate at hydrophobic siloxane patches ([triple bond, length as m-dash]Si–O–Si[triple bond, length as m-dash]) of the silica surface despite electrostatic repulsion between surface silanol ([triple bond, length as m-dash]SiO) and the carboxylate (–COO) headgroup of PFCA. Acidic pH and background cations promote the adsorption further by reducing the anion–anion Coulomb repulsion.

Graphical abstract: Adsorption of perfluorocarboxylic acids at the silica surface

Supplementary files

Article information

Article type
Communication
Submitted
14 Sep 2016
Accepted
05 Dec 2016
First published
05 Dec 2016

Chem. Commun., 2017,53, 589-592

Adsorption of perfluorocarboxylic acids at the silica surface

U. Shafique, V. Dorn, A. Paschke and G. Schüürmann, Chem. Commun., 2017, 53, 589 DOI: 10.1039/C6CC07525H

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