Abstract
ABSTRACTChromenone-rhodamine conjugate 1 has been synthesized and its metal ion binding properties have been studied in CH3CN/water (3:1, v/v; 10 mM HEPES buffer; pH = 6.85). Compound 1 senses multiple metal ions such as Al3+ and Hg2+ by exhibiting turn on fluorescence and color change (colorless to pink). Al3+ and Hg2+ ions have been distinguished with the aid of tetrabutylammonium iodide (TBAI). While in the presence of I− the pink color of the 1.Hg2+ complex was completely discharged; under identical conditions the pink color of 1.Al3+ complex was retained.
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