Results 171 to 180 of about 1,867 (199)
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A tight binding model of the bond dissociation mechanism in thermochromic leuco dyes
Journal of Molecular Structure, 2020Abstract It has long been known that heat, UV light, or protonization will cause the bond in Leuco dye's to break. The underlying microscopic mechanism is a still a matter of discussion. It stands to reason that a local model should correctly predict the temperature behavior of the heat capacity at the thermochromic phase transition.
C.B. Nelson +3 more
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Russian Journal of Applied Chemistry, 2008
The effect of humates isolated from peat on the state in solution of the leuco acid of Vat Brilliant Green C dye was examined spectrophotometrically and compared with the effect of dispersants traditionally used in textile-chemical processes: disodium methylenebis(naphthalenesulfonate) and triethanolamine.
I. Yu. Vashurina +2 more
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The effect of humates isolated from peat on the state in solution of the leuco acid of Vat Brilliant Green C dye was examined spectrophotometrically and compared with the effect of dispersants traditionally used in textile-chemical processes: disodium methylenebis(naphthalenesulfonate) and triethanolamine.
I. Yu. Vashurina +2 more
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Importance of Solvent Polarity in the Equilibrium Reaction of Leuco Dye and Developer
Chemistry Letters, 2006Abstract The absorbance of the leuco dye and developer solution system showed a maximum by the change of solvent polarity, and a clear correlation between the ratio of coloring species at the maximum and the dielectric constant of polar solvents has been revealed.
Yumiko Sekiguchi +3 more
exaly +2 more sources
Molecular Structures of the Coloring Species of a Leuco Dye with Phenolic Color Developers
Chemistry Letters, 2007Abstract We have isolated the coloring species of a leuco dye colored by three phenolic color developers and have revealed their molecular structures by X-ray crystallographic analysis for the first time: one leuco dye molecule combined with one developer molecule by the hydrogen bonds between the carboxylate anion of a leuco dye and the
Yumiko Sekiguchi +3 more
exaly +2 more sources
Vaporization Thermodynamics of Leuco Dyes: Measurement and Prediction
SSRN Electronic Journal, 2022Andrey A. Sokolov +4 more
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Analytica Chimica Acta, 1982
Abstract A one-phase, one-reagent, spectrophotometric technique is reported for the detection and determination of anionic surfactants of the sulfonate and sulfate types. Both applications are based on conversion of the colorless leuco-bases of triphenylmethane dyes (Brilliant Green and methyl violet) to colored (quinoid) forms by the anionic ...
Harvey Pobiner, Henry T. Hoffman
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Abstract A one-phase, one-reagent, spectrophotometric technique is reported for the detection and determination of anionic surfactants of the sulfonate and sulfate types. Both applications are based on conversion of the colorless leuco-bases of triphenylmethane dyes (Brilliant Green and methyl violet) to colored (quinoid) forms by the anionic ...
Harvey Pobiner, Henry T. Hoffman
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Unexpected Regioselectivity in the Sulfonation of Leuco Xanthene Dyes
The Journal of Organic Chemistry, 1994Paul R. Carlier +2 more
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Quantification of leuco-indigo in indigo-dye-fermenting suspension by normal pulse voltammetry
Journal of Bioscience and Bioengineering, 2022Keisei Sowa +2 more
exaly