UV-spectral changes for some azo compounds in the presence of different solvents |
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Authors: | Yadigar Gü lseven S?d?r,?sa S?d?rHalil Berber,Erol Ta?al |
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Affiliation: | a Bitlis Eren University, Faculty of Arts & Science, Department of Physics, 13000, Bitlis, Turkeyb Anadolu University, Faculty of Science, Department of Chemistry,26470, Eski?ehir, Turkeyc Eski?ehir Osmangazi University, Faculty of Arts & Science, Department of Physics, 26480, Eski?ehir, Turkey |
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Abstract: | The electronic absorption spectra of four azo dyes with different substituents (such as Cl, I, OH) are determined at room temperature in twenty-one solvents with different polarities. The electronic transitions of azo dyes are interpreted. Linear solvation energy relationships have been investigated for solvatochromic behaviors and solute-solvent interactions of azo dyes. Linear solvation energy relationships were performed by multiple linear regression analysis using dielectric function, refractive index function and Kamlet-Taft parameters. We have observed that the hydrogen bonding acceptor ability and the induction-dispersive forces of solvent molecules have caused the bathochromic shift in absorption maxima of azo dyes. |
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Keywords: | Azo dyes Linear solvation energy relationship Solvatochromism Absorption spectra |
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