Issue 29, 2015

The first report on phosphonate-based homopolymers combining both chelating and thermosensitive properties of gadolinium: synthesis and evaluation

Abstract

An original phosphonate-based acrylamide was first prepared in four steps including the incorporation of a valuable carbamoylmethylphosphonate moiety. This monomer was then polymerized, thus leading to poly(diethyl-6-(acrylamido)hexylcarbamoylmethylphosphonate) (P(CPAAm6C)), combining both thermosensitivity and chelating properties. The influence of different parameters (polymer concentration, salt, and acidity) on the P(CPAAm6C) cloud point was determined, mainly considering the salting-out and salting-in effect related to the Hofmeister series. Finally, it was proved that thermosensitive P(CPAAm6C) was efficient for the complexation of gadolinium below and above the cloud point. The latter logically depended on the Gd sorption. To our knowledge, the P(CPAAm6C) polymer represents the only example reported in the literature where only one monomeric unit can allow, on the one hand, the complexation of rare earth elements, in particular gadolinium, and, on the other hand, thermo-responsive properties. The poly(diethyl-6-(acrylamido)hexylcarbamoylmethylphosphonate) polymers open the way to new materials that could be used for the treatment of rare earth elements containing effluents, allowing their recovery while possibly recycling the homopolymer.

Graphical abstract: The first report on phosphonate-based homopolymers combining both chelating and thermosensitive properties of gadolinium: synthesis and evaluation

Supplementary files

Article information

Article type
Paper
Submitted
24 May 2015
Accepted
11 Jun 2015
First published
12 Jun 2015

Polym. Chem., 2015,6, 5264-5272

Author version available

The first report on phosphonate-based homopolymers combining both chelating and thermosensitive properties of gadolinium: synthesis and evaluation

D. Gomes Rodrigues, N. Dacheux, S. Pellet-Rostaing, C. Faur, D. Bouyer and S. Monge, Polym. Chem., 2015, 6, 5264 DOI: 10.1039/C5PY00785B

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