UNIGE document Scientific Article
previous document  unige:144148  next document
add to browser collection
Title

Ionophore-based ion-exchange emulsions as novel class of complexometric titration reagents

Authors
Published in Chemical Communications. 2014, vol. 50, no. 84, p. 12659-12661
Abstract Complexometric titrations rely on a drastic change of the pM value at the equivalence point with a water soluble chelator forming typically 1 : 1 complexes of high stability. The available chemical toolbox of suitable chelating compounds is unfortunately limited because many promising complexing agents are not water soluble. We introduce here a novel class of complexometric titration reagents, a suspension of polymeric nanospheres whose hydrophobic core is doped with lipophilic ion-exchanger and a selective complexing agent (ionophore). The emulsified nanospheres behave on the basis of heterogeneous ion exchange equilibria where the initial counter ion of the ion-exchanger is readily displaced from the emulsion for the target ion that forms a stable complex in the nanosphere core. Two different examples are shown with Ca2+ and Pb2+ as target ions. The lack of protonatable groups on the calcium receptor allows one to perform Ca2+ titration without pH control.
Identifiers
Full text
Article (Published version) (1.7 MB) - document accessible for UNIGE members only Limited access to UNIGE
Other version: http://xlink.rsc.org/?DOI=C4CC05754F
Structures
Citation
(ISO format)
ZHAI, Jingying, XIE, Xiaojiang, BAKKER, Eric. Ionophore-based ion-exchange emulsions as novel class of complexometric titration reagents. In: Chemical Communications, 2014, vol. 50, n° 84, p. 12659-12661. doi: 10.1039/C4CC05754F https://archive-ouverte.unige.ch/unige:144148

49 hits

0 download

Update

Deposited on : 2020-11-04

Export document
Format :
Citation style :