Langmuir–Blodgett Film of Asymmetric Calix[4]arene Derivative Modified Electrode for Voltammetric Determination of Silver

Abstract

Abstract A new electrochemical voltammetric sensor, Langmuir–Blodgett (LB) film of 25,27‐dimethoxy‐26‐( N ‐trichloroacetyl)carbamoyloxy‐ p ‐tert‐butylcalix[4]arene (DCA) modified GCE (LB DCA –GCE), was designed and successfully used for recognition and determination of trace amounts of Ag + in water. Under the optimum experimental conditions, the lowest detectable concentration of Ag + reached 1 × 10 −9 mol L −1 . Moreover, LB DCA –GCE exhibited a well‐defined response relating to the Ag + with good sensitivity, selectivity, reproducibility, and long stability. The recognizing mechanism of LB DCA –GCE for silver ion in aqueous solution was also discussed. The results show that the size of calixarene cavity may be the predominate factor affecting recognition of calixarene for silver ions.