Benzophenone based fluorophore for selective detection of Sn2+ ion: Experimental and theoretical study
Abstract Synthesis of novel benzophenone-based chemosensor is presented for the selective sensing of Sn 2+ ion. Screening of competitive metal ions was performed by competitive experiments. The specific cation recognition ability of chemosensor towards Sn 2+ was investigated by experimental (UV–visible, fluorescence spectroscopy, 1 H NMR, 13 C NMR, FTIR and HRMS) methods and further supported by Density Functional Theory study. The stoichiometric binding ratio and binding constant (K a ) for complex is found to be 1:1 and 1.50×10 4 , respectively. The detection limit of Sn 2+ towards chemosensor was found to be 0.3898ppb. Specific selectivity and superiority of chemosensor over another recently reported chemosensor is presented. Highlights Benzophenone-based chemosensor for Sn 2+ has been synthesized. Specific selectivity and superiority of our fluorophore over the only reported fluorophore for Sn 2+ ion sensing (along interference of Al 3+ ion) is explained. Sn 2+ recognition was investigated by spectroscopic techniques and DFT study. Graphical Abstract [DISPLAY OMISSION]
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