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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/359

Title: Tautomersim and Spectral Properties of Alizarin (1,2-Dihydroxyanthracene-9, 10-Dione)
Authors: Tesfaye, Kebede
Advisors: Dr. Mesfin Redi
Keywords: Alizarin
fluorescence
tautomers
computational
absorption
protic
aprotic and 1H NMR
Copyright: 2007
Date Added: 12-Dec-2007
Publisher: Addis Ababa University
Abstract: This paper mainly tends to explain the dual fluorescence of alizarin and its structures that are responsible for the existence of fluorescence emission spectra different from absorption spectra. And uses structural isomerism (Tautomersim) to explain the dual fluorescence shown by this compound. As well the affect of the PH of the media, polarity of the solvent and hydrogen bond forming tendency of solvents on both absorption and fluorescence emission spectra of alizarin were studied. Four alizarin tautomers were selected for simplicity that may exist in both ground and excited state or only in one of the two states. The structure of this compound is investigated both experimentally and theoretically. Experimentally its absorption, fluorescence emission spectra and 1H NMR were done and computational techniques (HF, DFT and semiemperical) were used to calculate total energy, Gibbs free energy, dipole moment, excitation energy and other molecular parameters.
Description: A Project Submitted to the School of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in Chemistry
URI: http://hdl.handle.net/123456789/359
Appears in:Thesis - Chemistry

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