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UV‐Vis spectroscopic study of the hydrophilic and solvatochromic 4‐[2,6‐diphenyl‐4‐(pyridin‐4‐yl)pyridinium‐1‐yl]‐2,6‐bis(pyridin‐3‐yl)phenolate betaine dye in aqueous tetra‐n‐butylammonium bromide
Author(s) -
Herodes Koit,
Leito Ivo,
Koppel Juta,
Reichardt Christian,
Koppel Ilmar A.
Publication year - 2005
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/poc.958
Subject(s) - solvatochromism , chemistry , betaine , tetra , pyridinium , bromide , aqueous solution , solvation , solvent , medicinal chemistry , ultraviolet visible spectroscopy , photochemistry , inorganic chemistry , organic chemistry
The solvent influence 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 [ E T (8) dye] dissolved in binary water–tetra‐ n ‐butylammonium bromide mixtures was studied by UV–Vis spectroscopy and compared with analogous measurements of the standard E T (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 E T (8) betaine dye can be applied for the determination of E T (30) values for aqueous media. However, the nonlinear nature of the relationship has to be taken into account if accurate results are desired. Copyright © 2005 John Wiley & Sons, Ltd.