N-乙基咔唑席夫碱EDA-NECD的合成及其对Cu^(2+)的识别研究

Highly selective fluorescence detection of Cu^(2+) by the Schiff base of EDA-NECD

由N-乙基咔唑-3-甲醛(NECD)与乙二胺(EDA)合成N-乙基咔唑席夫碱化合物EDA-NECD,用IR、1 H NMR等手段表征其结构;研究各种金属离子对其荧光性能的影响,结果表明Cu2+能显著地猝灭其荧光,而余者则几无影响;其紫外吸收峰值随着Cu2+浓度的增加而增加,表明二者存在着化学反应。EDA-NECD有望作为重金属离子Cu2+的荧光探针。

The Schiff base of EDA-NECD was synthesized.Its structure was characterized by using IR,UV and 1H NMR.The fluorescent and the influence of different transitional metal ions such as Co2＋,Ca2＋,Zn2＋,Cu2＋,K＋,Ni2＋,Mn2＋,Pb2＋ on this Schiff base were studied systematically.The results showed this Schiff base exhibited a highly selective fluorescence quenching effect by Cu2＋ ions,while other metal ions almost no quenching happened.The absorption spectra increased with the addition of Cu2＋ into the solution of EDA-NECD,suggesting that chemical reaction occurred between the Cu2＋ and EDA-NECD.This Schiff base is promising to be the probe for the Cu2＋.