Jańczyk M1, Adamczyk-Woźniak A, Sporzyński A, Wróblewski W.
Anal Chim Acta. 2012 Jul 6;733:71-7. doi: 10.1016/j.aca.2012.04.037. Epub 2012 May 7.Newly synthesized organoboron compounds - 4-octyloxyphenylboronic acid (OPBA) and pinacol ester of 2,4,6-trifluorophenylboronic acid (PE-PBA) - were applied as Lewis acid receptors of fluoride anions. Despite enhanced selectivity, the polymer membrane electrodes containing the lipophilic receptor OPBA exhibited non-Nernstian slopes of the responses toward fluoride ions in acidic conditions. Such behavior was explained by the lability of the B-O bond in the boronic acids, and the OH(-)/F(-) exchange at higher fluoride content in the sample solution. Read More