Abstract
AbstractSolvent effects on the recently synthesized hydrophilic and negatively solvatochromic 4‐[2,6‐diphenyl‐4‐(pyridin‐4‐yl)pyridinium‐1‐yl]‐2,6‐bis(pyridin‐3‐yl)phenolate betaine dye [ET(8) dye] in binary solvent mixtures of dimethyl sulfoxide and acetonitrile with water, methanol, propan‐2‐ol and 2‐methylpropan‐2‐ol were studied by UV–visible spectroscopy and compared with analogous measurements of the standard ET(30) betaine dye [2,6‐diphenyl‐4‐(2,4,6‐triphenylpyridinium‐1‐yl)phenolate]. A preferential solvation model was applied to the data obtained. The applicability of the ET(8) betaine dye for the determination of ET(30) values for aqueous media is discussed. Copyright © 2003 John Wiley & Sons, Ltd.
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