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صفحه اصلی
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بیست و نهمین کنفرانس شیمی آلی ایران
A new fluorescein-based chemical sensor for selective identification of Cu2+ and Hg2+
نویسندگان :
Sepideh Pourrohani ( دانشگاه مازندران ) , Saied Shafiei Navid ( دانشگاه مازندران ) , Yaghoub Sarrafi ( دانشگاه مازندران ) , Mahmood Tajbakhsh ( دانشگاه مازندران )
کلید واژه ها :
Fluorescein،Chemical sensor،Heavy metals،selective sensing
چکیده مقاله :
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 presence of EDTA show that the fluorescence was turned on with addition of the extra amount of the mentioned 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.
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