一种简单高效的铝离子化学传感器

A Simple and Efficient Chemical Sensor for Identifying Al^(3+) Ions

利用2-羟基-1-萘甲醛和2,6-吡啶二甲酰肼反应生成了一种简单高效的荧光探针L,通过^(1 )HNMR表征了其结构.在DMF和水(体积比为1∶1)的体系下,L能够高选择性识别铝离子,表现出明显的荧光增强.通过对10μmol/L的受体进行滴定实验,测得探针L对Al ^(3+)具有较低的检测限(10.64μmol/L),表明探针L检测铝离子具有较高的灵敏度.当荧光发射强度出现了转折点时探针L的摩尔数为0.66,证明探针L与Al ^(3+)的结合比为1∶2,结合常数为2.951×10^(9 )L/mol.

A simple and efficient fluorescent probe L was synthesized by the reaction of 2-hydroxy-1-naphthaldehyde with pyridine-2,6-dicarbohydrazide.The structure of L was characterized by 1 HNMR.The L used as a chemical sensor displays an highly selective recognition for Al 3＋amongst those tested metal ions.Which has a significant fluorescence enhancement in the mixed DMF and water（1∶1）.A lower detection limit（10.64μmol/L）for Al 3＋was measured based on 10μmol/L receptor titration experiment,indicating the probe L has the higher sensitive recognition for Al 3＋than those tested metal ions.When the molar ratio of probe L is close to 0.66,the fluorescence emission intensity shows a turning point.The combination ratio of probe L with Al 3＋is 1∶2,and the corresponding binding constant is 2.951×109 L/mol.