Fluorescence Sensing Investigation of One Quinoline-Based Molecule for Nitroaromatic Compounds and Anions
One quinoline-based functional molecule(BIPQ)was synthesized by using 2-(1H-benzo[d]imidazol-1-yl)-8-hydroxyquinoline and 2-chloromethylpyridine hydrochloride as raw materials.Compared to other organic solvents,the N,N-dimethylacetamide solution of compound BIPQ showed the strongest fluorescence emission intensity at 452nm.The fluorescence sensing performance of compound BIPQ for nitroaromatic compounds and anions revealed that nitroaromatic compound 2,4,6-trinitrophenol(TNP)and anion Cr2O72-showed significant quenching effects on the fluorescence intensity of BIPQ,with quenching constants(KSV)of 5.9×103 L·mol-1 and 3.8×103 L·mol-1,respectively.The anti-interference experiments results showed that BIPQ displayed high selectivity toward TNP and Cr2O72 over other competing nitroaromatic compounds and anions,respectively.In addition,the pH range for the effective fluorescence detection of TNP and Cr2O72-in BIPQ solution was investigated,and BIPQ was also applied to the fluorescence detection of TNP and Cr2O72-in actual water samples.
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