【摘要】 以4-硝基苯肼、8-羟基喹哪啶等为原料设计合成了8-羟基-2-喹啉甲醛-4-硝基苯腙(1),经元素分析、1H NMR对其结构进行了表征。在V(二甲亚砜)/V(甲醇)=1∶9混合溶剂中采用UV-Vis光谱法研究了苯腙(1)对Li+、K+、Mg2+、Ca2+、Mn2+、Co2+、Ni2+、Zn2+、Cd2+、Hg2+、Fe2+、Fe3+及Cu2+离子的识别性能。结果表明,苯腙1仅对Cu2+和Zn2+有特殊的识别能力,加入Cu2+或Zn2+的苯腙1溶液由黄色分别变为橙色和红色,其光谱在413 nm处的吸收峰强度减小,且分别在485和508 nm附近产生新的吸收峰。竞争实验表明,苯腙1对Zn2+的检测不受除Cu2+以外上述其它阳离子影响,而对Cu2+的检测不受上述任何其它阳离子的影响。线性拟合结果显示,苯腙1与Cu2+和Zn2+分别形成了1∶1和1∶2的配合物。更多还原

【Abstract】 8-hydroxy-2-quinoline formaldehyde-4-nitrophenylhydrazone( 1) was synthesized by using 4-nitrophenyl hydrazine and 8-hydroxyquinaldine as starting materials and its structure was characterized by elemental analysis,1H NMR.The influence of Li+,K+,Mg2 +,Ca2 +,Mn2 +,Co2 +,Ni2 +,Zn2 +,Cd2 +,Hg2 +,Fe2 +,Fe3 +and Cu2 +on the spectra of phenylhydrazone 1 were investigated by the UV-Vis spectrum method in V( DMSO) / V( methanol) = 1 ∶ 9 mixed solvent. The result indicated that the UV-Vis spectra of phenylhydrazone 1 only behaved special recognition and sensitivity to Cu2 +and Zn2 +. The color of phenylhydrazone 1 was changed from yellow to orange or red upon adding Cu2 +or Zn2 +respectively,which resulted in the decrease in the absorption at 413 nm and the new absorption near 485 nm and508 nm. Competition experiments indicated that other cations but Cu2 +had no effect on the detection of Zn2 +,while the presence of other ions had no effect on the detection of Cu2 +. The fitting results of linear display that the 1∶ 1 and 1∶2 binding stoichiometry of phenylhydrazone 1 with Cu2 +and Zn2 +respectively.更多还原