Issue 3, 2017
From the journal:

Chemical Communications

Adsorption of perfluorocarboxylic acids at the silica surface†

Umer Shafique,ab   Vivien Dorn,b   Albrecht Paschkea  and  Gerrit Schüürmann ORCID logo *ab  

* Corresponding authors

a UFZ Department of Ecological Chemistry, Helmholtz Centre for Environmental Research, Permoserstraße 15, 04318 Leipzig, Germany
E-mail: gerrit.schuurmann@ufz.de

b Institute for Organic Chemistry, Technical University Bergakademie Freiberg, Leipziger Straße 29, 09596 Freiberg, Germany

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

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Article information

DOI
https://doi.org/10.1039/C6CC07525H
Article type
Communication
Submitted
14 Sep 2016
Accepted
05 Dec 2016
First published
05 Dec 2016

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

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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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