Abstract
Abstract The potentiometric response behavior of an electrode consisting of a non-plasticized polyacrylamide polymer (PAA) coupled to oxo(phthalocyaninato)vanadium(IV) ([VO(pc)]) was examined for various anions in such nonaqueous solvents as acetonitrile (AN), propylene carbonate (PC), dimethylacetamide (DMA), and N-methylpyrrolidinone (NMP). The electrode shows a selective Nernstian or a near-Nernstian response to F− and CN− in AN, PC, DMA, and NMP. It shows a non-Nernstian response to I−, NO2−, and CF3SO3−, but a very poor response to Cl−, Br−, SCN−, BPh4−, PF6−, and ClO4−. Complex formation reactions of [VO(pc)]s with F− and CN− are suggested based on the UV/vis spectra, and may occur due to ligand exchange reactions of F− and CN− with AN or water molecule(s) coordinated to [VO(pc)]s. The PAA–[VO(pc)] electrode has been confirmed as being available for use in determining the solubility product constant of sodium fluoride in AN.
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