A novel diarylethene‐based fluorescence sensor with a benzohydrazide unit for the detection of Zn²⁺

Abstract

A novel fluorescent sensor on the basis of diarylethene and benzohydrazide unit was successfully synthesized. Its photochromic and fluorescent switching properties have been studied in detail by the irradiation of UV‐visible (UV‐Vis) lights and the stimulus of Zn2+/EDTA. The sensor exhibited high sensitivity and selectivity toward Zn2+ in tetrahydrofuran, which is not interfered by other cations, especially of congener Cd2+. The fluorescence intensity enhanced 84 times along with a 44‐nm blue shift of the emission peak after adding Zn2+. The stoichiometric ratio between the sensor and Zn2+ was 1:1, and the limit of detection (LOD) was calculated as 5.60 × 10−9 mol L−1. Besides, the sensor was applied in the detection of practical water samples with high accuracy.

Recent Advances in Photoswitchable Fluorescent and Colorimetric Probes

“…The basic design approach for these Zn 2+ photoswitchable probes involves coupling a photochromic diarylethene to a ligand structure specific to the target ion (Figure 5). When Zn 2+ binds to the ligand, the resultant complex exhibits a fluorescent response, which can be modulated by the light-controlled "open" or "closed" states of the diarylethene, thus paving the way for the development and application of various related Zn 2+ fluorescent probes [121][122][123][124][125][126][127][128][129][130][131]. Fu et al introduced a sophisticated ratiometric fluorescent chemosensor for Zn 2+ , utilizing a novel diarylethene compound that is covalently bonded to an 8aminoquinoline-2-aminomethylpyridine unit [121].…”

“…The basic design approach for these Zn 2+ photoswitchable probes involves coupling a photochromic diarylethene to a ligand structure specific to the target ion ( Figure 5 ). When Zn 2+ binds to the ligand, the resultant complex exhibits a fluorescent response, which can be modulated by the light-controlled “open” or “closed” states of the diarylethene, thus paving the way for the development and application of various related Zn 2+ fluorescent probes [ 121 , 122 , 123 , 124 , 125 , 126 , 127 , 128 , 129 , 130 , 131 ].…”

Recent Developments in the Detection of Zn2+ Ions Using Schiff Base Probes

“…All rights reserved. Lu and his research group [76] successfully designed and synthesized a novel kind of fluorescent moiety 30 (Figure 9) based on the diarylethene and benzohydrazide unit to detect Zn 2+ ions. The fluorescent and photochromic switching properties have been studied in detail by the UV-vis light.…”