8-羟基喹啉偶氮苯衍生物应用于阴离子及阳离子的识别  

Anion and Cation Recognition Based on 8-Hydroxyquinoline Azo Phenyl Derivatives

作　　者：吴芳英[1] 孙梅珍[1] 谭晓芳[1] 万筱芬[1] 

机构地区：[1]南昌大学化学系,江西南昌330031

出　　处：《南昌大学学报（理科版）》2008年第5期469-472,共4页Journal of Nanchang University(Natural Science)

基　　金：江西省自然科学基金资助项目(JXNSFNo.2007GZH2119);江西省教育厅资助项目(2005-38)

摘　　要：研究了系列8-羟基喹啉偶氮苯衍生物与过渡金属离子如Ni2+,Co2+,Zn2+和Cu2+等离子间的相互作用,探讨了主体分子中的不同取代基对其光谱性质的影响及对阳离子识别选择性的影响。结果表明含有强吸电子基团-NO2或-CN的主体分子对阳离子的亲合力大于含有供电子基团-N(CH3)2或-CH3的主体分子;而含供电子基团的主体分子形成的金属离子配合物,其最大吸收波长更长,长波长的吸收峰源于金属离子的拉电子作用促进了分子内的电荷转移。主体分子与阴离子通过氢键结合,对氟离子具有很高的选择性识别能力;而其金属配合物对阴离子的光谱响应的选择性明显下降,主要是因为阴离子与金属配合物通过静电作用结合所至。The interaction between series of 8 - hydroxyquinoline azo phenyl derivatives and transition metal ions such as Ni^2＋ ,Co^2＋ ,Zn^2＋ and Cu^2＋ was investigated. The effect of hosts＇ substituent group on the selectivity for combining with cations was also studied. The experiment results displayed that hosts containing drawing electron group such as - NO2 or - CN possessed higher affinity to metal ions than that of host containing electron donor group. The maximum absorption wavelength of metal complex of containing electron donor group peaked at longer wavelength which was assumed that metal ion promoted the intramolecular charge transfer. The host 1 high selectively responded to fluoride because of its smaller radium and higher ability of forming hydrogen bond. However, the presence of most of anions such as F^- , AcO^-, H2PO4^-, Cl^- HSO4^- and NO3^- led the absorption spectra of metal complex to undergo dramatic changes. The selectivity decrease was ascribed to the electrostatic interaction between metal complex and anion.

关 键 词：8-羟基喹啉偶氮苯衍生物 阳离子识别 阴离子识别 比色分析 

分 类 号：O657.32[理学—分析化学]