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以1-(2-氯苯基)-2-(2,3-二甲氧基苯基)-乙二酮、水杨酰肼为原料合成了一种新型的离子荧光探针苯甲酰双腙类衍生物BDH,化合物结构通过红外、氢谱、碳谱以及高分辨质谱进行确认。选择性实验表明,当以乙腈为溶液时,化合物BDH能够选择性地识别Cr~(3+)。竞争性实验表明,当其他金属离子与Cr~(3+)形成共存离子时,不影响BDH对Cr~(3+)的检测作用,说明配体具有较强的抗干扰能力。荧光滴定实验表明,当Cr~(3+)浓度范围在8×10~(-7)~5×10~(-6)mol/L时,Cr~(3+)浓度与ΔF呈现较好的线性关系,线性拟合系数为0.996 95,检出限为1.19×10~(-11)mol/L。Job’s Plot实验表明,BDH和Cr3+以1∶1的形式配位。
A novel ionic fluorescent probe, benzoylbis hydrazones, was synthesized from 1- (2-chlorophenyl) -2- (2,3-dimethoxyphenyl) -ethanedione and salicylic hydrazide Derivatives BDH, compound structures were confirmed by infrared, hydrogen, carbon and high-resolution mass spectra. Selective experiments show that when using acetonitrile as a solution, compound BDH can selectively recognize Cr 3+. The competitive experiments show that when the other metal ions and Cr ~ (3 +) form coexisting ions, it does not affect the detection of Cr ~ (3+) by BDH, indicating that the ligand has strong anti-interference ability. Fluorescence titration experiments showed that the concentration of Cr 3+ and the ΔF showed good performance when the Cr 3+ concentration ranged from 8 × 10 -7 to 5 × 10 -6 mol / The linearity coefficient was 0.99695. The detection limit was 1.19 × 10 ~ (-11) mol / L. Job’s Plot experiments show that BDH and Cr3 + form a 1: 1 form.