A fully lipophilic ionic liquid comprising a lipophilic fluorescein anion and a trihexyltetradecylphosphonium cation was synthesized and used as the plasticizer for a PVC membrane optode, demonstrating high sensitivity, rapid, and reversible responses toward anions and heparin.
A new unique ionic liquid consisting of two purely functional sensing molecules, an anionic calcium ionophore and a cationic dye, was developed for the first time, and highly sensitive calcium detection was achieved.
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