离子型β－CD对Zn（Ⅱ）－桑色素荧光体系作用的研究及应用

Enhancement of the Fluorescence of Zn(Ⅱ)-Morin Complex by Ionic β-Cyclodextrins and Its Analytical Application

离子型β－ＣＤ对Ｚｎ（Ⅱ）－桑色素荧光体系作用的研究及应用朱利中，戚志红，金辉，戚文彬（杭州大学环境科学系，杭州，３１００２８）关键词锌，桑色素，离子型β－环糊精，荧光分析法近年来环糊精（Ｃｙｃｌｏｄｅｘｔｒｉｎ，ＣＤ）在各类色谱、荧光及分光光度分析...

The effects of three ionic chemical modified β-cyclodextrins, hydroxypropyltrimethylamine β-CD(QA-β-CD),diethylaminoethyl β-CD(TA-β-CD)and carboxymethylβ-CD(CM-β-CD)on Zn(Ⅱ)-Morin fluorescence system were studied comparatively with β-cyclodextrin(β-CD).A mechanistic investigation has been conducted by using pyrene as the probe molecule for the media polarity changes in its surrounding microenvironment.The different effects of various CDs or CD-surfactant mixture on Zn(Ⅱ)-Morin system have been interpreted in terms of formation and geometric compatibility of multicomponent complex,fluorescence quantum yield ratio of fluorophoric complex to that of the corresponding fluorophoric reagent.A method is described for the fluorimetric determination of zinc based on the formation of Zn(Ⅱ)-Morin complx in the presence of CM-β-CD.