Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (11): 1694.

• Articles • Previous Articles     Next Articles

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

ZHU Li-Zhong, QI Zhi-Hong, JIN Hui, QI Wen-Bin   

  1. Department of Environmental Science, Hangzhou University, Hangzhou, 310028
  • Received:1994-11-01 Revised:1995-04-30 Online:1995-11-24 Published:1995-11-24

Abstract: 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).Amechanistic 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.Amethod is described for the fluorimetric determination of zinc based on the formation of Zn(Ⅱ)-Morin complx in the presence of CM-β-CD.

Key words: Zinc, Morin, Ionic β-cyclodextrins, Fluorimetry

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