Ferrocene-containing macrocyclic triazoles for the electrochemical sensing of dihydrogen phosphate anion

摘要

Two novel ferrocene-containing macrocyclic triazoles (L1 and L2) and their acyclic analogs (L3 and L4) were easily prepared by "click" reaction. The anions binding abilities of L1-L4 were evaluated by cyclic voltammetry and differential pulse voltammetry methods. The results revealed that the receptors L1-L4 have exclusive electrochemical sensing of H2PO4, with the shift in redox potentials of L1-L4 towards the cathodic values. The binding mechanisms between the receptors and H2PO4 were examined by H-1 NMR titrations and density functional theory (DFT) calculations. (C) 2016 Elsevier B. V. All rights reserved.