Abstract
Rod-like fluorescent material (4,7-di-pyrrol-1-yl-benzo[1,2,5]thiadiazole) with D-A-D structure is successfully designed and synthesized by introducing functional pyrrole group on benzothiadiazole molecule. Theoretical and experimental methods are adopted to deeply analyze its electronic structure, microstructure and optical properties. Upon the addition of Fe(Ⅲ) or Cr(Ⅵ), it immediately shows fluorescence quenching phenomenon while the addition of other ions exhibits no obvious quenching effect. The corresponding results reveal that DPYBT is quite promising for the fluorescence detection of Fe(Ⅲ) and Cr(Ⅵ), and the limit of detection for them are 3.04 μM and 43.5 nM, respectively. Meanwhile, it is practical for the visible detection in real environment. It also performs a great potential in search of new drugs towards 4DDM protein.
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