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Interaction between Chlorazol Sky Blue FF and Chrysophenine G in Aqueous Solution
Author(s) -
DERBYSHIRE A. N.,
PETERS R. H.
Publication year - 1956
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1956.tb02136.x
Subject(s) - aqueous solution , adsorption , chemistry , absorption (acoustics) , dyeing , complex formation , absorption spectroscopy , calorimetry , analytical chemistry (journal) , chromatography , organic chemistry , inorganic chemistry , materials science , thermodynamics , optics , physics , composite material
The absorption spectra of mixtures of Chlorazol Sky Blue FF and Chrysophenine G in aqueous solution have been measured at room temperature and at 60°c. Spectra of regenerated cellulose sheet dyed with the two dyes from mixture dyebaths have also been determined. Paper and column chromatography on mixtures of the two dyes confirm the formation of complexes, deduced from the spectral measurements. The heat of formation of the 1:1 complex of the two dyes, measured by direct calorimetry, is –15 kcal. per mole. Finally, equilibrium adsorption of the two dyes by cotton from mixture dyebaths has been determined. It is concluded that formation of a 1:1 complex occurs in aqueous solution to an appreciable extent even at 90°c. This complex formation explains in a semi‐quantitative way the change in dye adsorption compared with that of the same dyes when applied singly. It is very probable that failure of dyeing data on single dyes to predict the behaviour of the same dyes in mixtures is due to interaction of this kind between the dyes in solution.