Preferential Solvation Studies of 1, 5 Diamino Anthraquinone in Binary Liquid Mixtures |
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Authors: | G Suganthi C Meenakshi and V Ramakrishnan |
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Institution: | (1) Department of Laser Studies, School of Physics, Madurai Kamaraj University, Madurai, 625 021, India;(2) Department of Chemistry, Sri Meenakshi Government College for Women, (Autonomous), Madurai, 625 002, India |
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Abstract: | The absorption and fluorescence spectra of 1,5-diaminoanthraquinone(1,5-DAAQ) have been investigated in organic solvents-Benzene(BZ),
Ethanol (ETOH), Acetonitrile (AN), Dimethylformamide (DMF) and Dimethyl sulfoxide (DMSO). There is an intra molecular hydrogen
bond formed between quinoid oxygen and the substituents NH2 C = O...H-N]. The interaction of the hydrogen atom of - NH2 leads to red shift in both absorption and fluorescence spectra. The dipole moment ratio of 1,5 DAAQ in ground and excited
states was calculated from stokes shift obtained from optical absorption and fluorescence spectra. Photo physical properties
of 1,5-DAAQ dye was studied using this absorption and fluorescence spectroscopy techniques in binary liquid mixtures(AN +
DMF, AN + DMSO, AN + ETOH and BZ + ETOH). |
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Keywords: | |
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