Si-corrole-based fluoride fluorometric turn-on sensor
Ewa Jaworska, Fabrizio Caroleo, Corrado Di Natale, Krzysztof Maksymiuk, Roberto Paolesse, Agata Michalska
Abstract
We present here a new type of fluoride ion optode, constituted by a highly lipophilic PVDF porous membrane modified with a liquid receptor layer containing the emission-active Si corrole F[Formula: see text] selective ionophore. For the optimized composition of the receptor layer, in acidic solutions an increase of Si-corrole emission was observed by increasing fluoride ion concentration, a behavior different from most porphyrinoid-based optical sensors. An observed linear dependence of the Si corrole emission intensity (read at 635 nm) was within the range 10[Formula: see text] to 10[Formula: see text] M of fluoride ions.
Topics & Concepts
CorroleChemistryOptodeFluorideIonophoreIonLayer (electronics)MembranePhotochemistryInorganic chemistryAnalytical Chemistry (journal)Organic chemistryBiochemistryAnalytical Chemistry and SensorsPorphyrin and Phthalocyanine ChemistryAdvanced biosensing and bioanalysis techniques