A selective and discriminating noncyclic receptor for HSO4− ion recognition

Abstract

The anion recognition ability of a novel noncyclic dipodalamine phenol receptor L was evaluated using absorption and fluorescence spectroscopic methods. The absorption and fluorescence spectra of L have shown a red shift upon the addition of HSO₄⁻ over other surveyed anions in water. The association constant (K_a) of L with HSO₄⁻ was calculated using Benesi–Hildebrand plot and Scatchard plot methodology, and it was found to be 3.1 ± 0.2 × 10³ M⁻¹.