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Study on Cyclodextrin-Anthraquinone Supramolecular Fluorescence Probes for the Determination of Metal Ions

Author: LiuXinFang
Tutor: WangZuo
School: Shanxi University
Course: Analytical Chemistry
Keywords: Anthraquinones Cyclodextrins Inclusion complex Fluorescence spectroscopy Ultraviolet spectroscopy Ions
CLC: O631.3
Type: Master's thesis
Year: 2010
Downloads: 115
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Abstract


Chapter 1:The structural features of cyclodextrin moleules, the progress of inclusion complexation behavior of the cyclodextrin hosts and the applications of cyclodextrin inclusion complexes were briefly introduced. Analytical methods for the determination of anthraquinones and the applications of anthraquinones to the determination of ions were also reviewed.Chapter 2:Formation of the inclusion complex of 1,8-Dihydroxyanthraquinone(1,8-DHAQ) with cyclodextrins(CDs) were characterized by fluorescence spectroscopy. In the presence ofβ-CD and NH4OH, the complex between 1,8-Dihydroxyanthraquinone and Mg2+ gives strong fluorescence emission. There is a satisfactory linear relationship between fluorescence intensity and Mg2+ concentration in the range of 2 to 20μmol/L. The detection limit is 0.19μmol/L and the precision is 0.63%.Chapter 3:The inclusion complexation behavior of cyclodextrins(CDs) with 1,4-Dihydroxyanthraquinone(1,4-DHAQ) were investigated by fluorescence spectroscopy. In the presence of P-CD, the complex between 1,4-Dihydroxyanthraquinone and Al3+ gives strong fluorescence emission. There is a satisfactory linear relationship between fluorescence intensity and Al3+ concentration in the range of 10 to 80μmol/L. The detection limit is 2.33μmol/L and the precision is 0.92%.Chapter 4:The formation of the inclusion complex of 1,2-Diaminoanthraquinone (1,2-DAAQ) with cyclodextrins(CDs) were studied by absorption and fluorescence spectroscopy. Ag+ was found to have a quenching effect on the fluorescence intensity of 1,2-DAAQ-β-CD inclusion complex. The fluorescence responses were concentration-dependent and can be well described by the typical Stern-Volmer equation. Under the condition of pH=9 and T=60℃,there is a satisfactory linear relationship between F0/F and Ag+ concentration in the range of 5.0×10-6 to 4.0×10-5 mol/L. The detection limit of Ag+ is 2.66×10-7 mol/L and the precision is 0.73%.Chapter 5:The formation of the inclusion complex of 1,4-Diaminoanthraquinone (1,4-DAAQ) with cyclodextrins(CDs) were characterized by absorption and fluorescence spectroscopy. Both Ag+ and Cu2+ were found to quench the fluorescence of 1,4-DAAQ-P-CD inclusion complex. The fluorescence responses were concentration-dependent and can be well described by the typical Stern-Volmer equation. The detection limits are 5.33×10-6 mol/L and 9.23×10-6 mol/L for Ag+ and Cu2+, respectively.

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