P2.1.11 Fluoride sensing by polymeric membranes based on organoboron Lewis acid receptors
- Event
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany - Chapter
- P2.1 Biosensors
- Author(s)
- M. Janczyk, W. Wróblewski - Warsaw University of Technology, Department of Microbioanalytics (Poland), A. Adamczyk-Wózniak, A. Sporzynski - Warsaw University of Technology, Department of Physical Chemistry (Poland)
- Pages
- 1357 - 1358
- DOI
- 10.5162/IMCS2012/P2.1.11
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
Intensive research is focused on organoboron receptors characterized by strong and selective interactions of threecoordinate boron center ("hard" Lewis acid) with fluoride ions ("hard" Lewis base). In this work, newly syntesized 4-octyloxyphenylboronic acid (OPBA) and pinacol ester of 2,4,6trifluorophenylboronic acid (PE-PBA) were proposed as fluoride-selective ionophores in polymer membranes. The membranes containing OPBA showed enhanced selectivity, but the slopes of the fluoride responses in acidic conditions were super-Nernstian. In contrary, theoretical behavior was noticed in the case of membranes doped with the pinacol ester derivative. A response mechanism of the polymer membrane electrodes based on organoboron receptors was proposed on the basis of potentiometric and 19F NMR studies.