A New Fluorescein-based Chemical Sensor for Selective Identification of Cu2+ and Hg2+
نویسندگان
1 Department of Organic Chemistry, Faculty of Chemistry, University of Mazandaran, 47416-95447 Babolsar, Iran
2 Department of Organic Chemistry, Faculty of Chemistry, University of Mazandaran, 47416-95447 Babolsar, Iran
3 Department of Organic Chemistry, Faculty of Chemistry, University of Mazandaran, 47416-95447 Babolsar, Iran
4 Department of Organic Chemistry, Faculty of Chemistry, University of Mazandaran, 47416-95447 Babolsar, Iran
doi
10.22036/org.chem.2024.445730.1326چکیده
In this research, fluorescein-based chemical sensors were designed and synthesized through the Schiff base reaction to identify Cu2+ and Hg2+ cations. For this purpose, at first SP1 and SP2 sensors were synthesized and their structures were investigated and confirmed by 1HNMR and MS spectroscopy methods. Then, their properties as chemical sensors for some metal cations were investigated by fluorescence emission spectroscopy and ultraviolet-visible spectroscopy (UV-Vis). The obtained results indicated that the SP1 and SP2 acted selectively and also showed a color change for Cu2+ and Hg2+ cations, respectively. The reversibility studies in the presence of EDTA showed that the fluorescence was turned on with the addition of the extra amounts of Cu2+ and Hg2+ cations. Also, the data obtained from Job’s graph and fluorescence titration determined that both sensors form complexes with cations in a ratio of 1:1. Since the structures of both SP1 and SP2 are rigid, the fluorescence turned on with a plausible CHEF mechanism.
