Anion Recognition Using Novel and Colorimetric Tweezer Receptors: 1,3‐Phenylenedi(carbonylhydrazone) in Aqueous‐organic Binary Solvents

Abstract

Two novel artificial tweezer receptors 1,3-phenylenedi(carbonylhydrazone) derivatives with a symmetrical structure have been synthesized. Receptor 3a [1,3-di(salicylidenehydrazinocarbonyl) dicated that the receptor 3a underwent deprotonation after the addition of an excess of fluoride anion. In particular, the anion recognition was successfully applied to CH 3 COONa in 15% H 2 O-85% DMSO. These findings were expected to be of significance for designing and developing novel color-based anion sensors operated in aqueous media.

Fluorescence and Colorimetric Chemosensors for Fluoride-Ion Detection

“…Finally, a selective response to AcO – is displayed by only 230 and 231 in DMSO/water (7.5:2.5, v/v). Two years later, the artificial tweezer 233 (Figure ), consisting of a symmetric 1,3-phenylenedi­(carbonylhydrazone)-based structure, was developed as a sensor by Wei’s group . The ability of this substance to recognize anions in DMSO and DMSO/H 2 O (85:15, v/v) was investigated by UV–vis spectroscopy.…”

Novel Hydrazone‐Based Tripodal Sensors: Single Selective Colorimetric Chemosensor for Acetate in Aqueous Solution

“…In view of these and being interested in the studies of anion recognition, [21][22][23] we want to develop a colorimetric anion sensors which could selectively sense acetate anions in water solution. The strategies for design of the sensors (sensors 1 and 2 in Scheme 1) are as follows.…”