【摘要】 为得到简便地识别Cu²⁺的传感器,设计合成了氧化偶氮苯双席夫碱化合物。采用紫外吸收光谱法研究了化合物对Cu²⁺的配合作用及对As³⁺、Mo⁶⁺、Mn²⁺、Zn²⁺、Fe³⁺、Pb²⁺、Al³⁺、Hg²⁺、Ni²⁺、Pt⁴⁺、Mg²⁺、Be²⁺、Sr²⁺、Cs+、Os4+、Cd²⁺、Se⁴⁺、Cr⁶⁺、Co²⁺、Rb+、Ba²⁺、V6+、Ca²⁺等23种金属离子的干扰作用。采用等摩尔的连续变化法（Job-plot）,研究了化合物与Cu²⁺形成配合物的配比。用红外光谱法研究了配合机理。同时研究了在EDTA存在时,化合物对Cu²⁺的"off-on"性质。结果表明,合成的化合物具有大共轭体系,结构新颖且稳定。化合物可以克服23种金属离子的干扰,对Cu²⁺的选择性很高。化合物与Cu²⁺形成1∶1型强发光配合物,可以达到比色（裸眼）识别。在1.32¹3.0μmol·L^-1范围内,化合物紫外光谱吸光度值与Cu²⁺浓度呈现良好的线性关系,线性范围宽,最低检出限为2.6×10-7mol·L^-1。在EDTA存在时,该配合物释放出Cu²⁺,表现出对Cu²⁺的"off-on"模式,红外光谱法研究明确了化合物与Cu²⁺的结合位点。研究结果表明,所合成的氧化偶氮苯双席夫碱化合物可以对Cu²⁺实现简便易行的比色（裸眼）识别。更多还原

【Abstract】 In order to obtain copper ion sensors,a bis-Schiff base containing an azoxy group was synthesized. The complexation effect of the compound on Cu²⁺was studied,and the interference of23 metal ions such as As³⁺,Mo⁶⁺,Mn²⁺,Zn²⁺,Fe³⁺,Pb²⁺,Al³⁺,Hg²⁺,Ni²⁺,Pt⁴⁺,Mg²⁺,Be²⁺,Sr²⁺,Cs+,Os4 +,Cd²⁺,Se4 +,Cr⁶⁺,Co²⁺,Rb+,Ba²⁺,V⁶⁺,Ca²⁺was also studied in Me OH-H₂O by UV-Vis spectroscopy. Job-plot method was used to study the ratio of the Cu²⁺complex with the compound. The cooperation mechanism was studied by infrared spectrometry,and the"off-on"nature of the compound with copper ion was studied in EDTA. The results indicate that the bis-Schiff base has a large conjugated system,the structure is novel and stable. The bis-Schiff base shows a highly selective response to Cu²⁺. A clear color change from colorless to yellow is observed upon the addition of Cu²⁺to the solution of the receptor in Me OH by naked-eyes and a single selectivity colorimetric recognition. The Job-plot shows that the bis-Schiff base coordinates with Cu²⁺to form 1 ∶ 1 stable luminescent complex. The UV absorbance of the system shows a good linearrelationship with Cu²⁺concentration within 1. 32-13. 0 μmol · L^-1,and the detection limit is2. 6 × 10^-7mol·L^-1. The sensing of Cu²⁺by this sensor is found to be reversible with the Cu²⁺induced color being lost upon the addition of EDTA. The process of titrating Compound 1 with Cu²⁺is reversible,and Compound 1 can be used as an off-on switch chemosensor. The complexation mechanism of Compound 1 and Cu²⁺was studied by IR spectroscopy,and the binding sites of compound 1 and Cu²⁺were identified.更多还原