Results 161 to 170 of about 3,143 (183)
Some of the next articles are maybe not open access.
The analysis of indigoid dyes as leuco forms by NMR spectroscopy*
Coloration Technology, 20001H and 13C NMR spectra of halogen‐ and alkoxy‐substituted indigoid dyes (indigotins), and of some unknown deuterated indigotins as leuco forms (i.e., reduced forms or ‘vats’), in deuterium oxide are recorded and discussed. NMR spectroscopy is a useful technique for the identification and characterisation of this traditional class of vat dyes.
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
Vaporization Thermodynamics of Leuco Dyes: Measurement and Prediction
SSRN Electronic Journal, 2022Andrey A. Sokolov +4 more
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
Unexpected Regioselectivity in the Sulfonation of Leuco Xanthene Dyes
The Journal of Organic Chemistry, 1994Paul R. Carlier +2 more
openaire +1 more source
Synthesis and characterization of polyurea microcapsules containing leuco dye
This thesis synthesized polyurea microcapsules containing leuco dye by interfacial polymerization. Wall materials and the ratios of core-to-wall were investigated to improve the characteristics of the microcapsules. The effect of core-to-wall ratio, wall material types (HDI, MDI and EDA) on the morphologies, particle size distribution of the resultant ...openaire +1 more source
The Behaviour of Leuco Vat Dyes above 100°c.
Journal of the Society of Dyers and Colourists, 1955S. Blackburn, M. R. Fox
openaire +1 more source
Reversible thermochromic systems based on a new library of flavylium spirolactone leuco dyes
Dyes and Pigments, 2023exaly