The electrode modified with Langmuir–Blodgett film ofp-tert-butylcalix[4]arene derivatives with sulfur-containing functionalities for the determination of silver

Abstract

A new voltammetric sensor, based on a new p-tert-butylcalix[4]arene derivative (TCAD) modified glassy carbon electrode (GCE) using Langmuir–Blodgett (LB) technique, was designed successfully and used for recognition and determination of Ag+. The π - A isotherms suggested that the monolayer of TCAD can coordinate with Ag+ at the air–water surface. Under the optimum experimental conditions, this voltammetric sensor shows a linear voltammetric response for Ag+ in the range of 1.0 × 10−8 ∼ 6.0 × 10−6 mol L−1 with detection limit 5.0 × 10−9 mol L−1. The high sensitivity, selectivity, and stability of this LB film modified electrode also demonstrate its practical application for a simple, rapid and economical determination of Ag+ in water sample.