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Solvent effects on electronic absorption and fluorescence spectra of 2,4-quinolinediol

Author:

Rajendran, A., Krishnasamy, K and Kabilan, S

Subject Area:

Life Sciences

Abstract:

The UV and fluorescence spectra of 2,4-quinolinediol (2,4-QDOL) were recorded in nine different solvents. Multiple regression analysis of 2,4-QDOL showed that the alcoholic solvent effect is best interpreted interms of Taft’s polar substituent constant (*), Kirkwood function of the dielectric constant (E¬s). The effects of solvent polarity and the extent of hydrogen bond on the absorption spectra of 2,4-QDOL were best interpreted by means of linear solvation energy relationships proposed by Kamlet and Taft. The Stoke’s shift of fluorescence spectra correlated with theoretically derived solvent parameters ET(30) and BK values.

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