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

Abstract

A series of novel tripodal colorimetric anion sensors based on hydrazone CH＝N-NH groups have been synthesized and their recognition behavior with anionic guests has been studied. In DMSO solutions, sensors 1 and 2 show colorimetric responses for F -, 2 4 H POand AcO -, while in DMSO/H 2 O (9∶1, V/V) solutions, sensor 1shows single selectivity for AcO -. 1 H NMR titration confirms that the tripodal sensors could bind anions through the collaboration of three hydrazone groups and anions residing in the central cavity of the sensors.