A selective and discriminating noncyclic receptor for HSO4- ion recognition

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 x 10(3) M-1.