Showing papers in "Dyes and Pigments in 2000"

TL;DR: In this article, the effect of dyehouse effluent strength on decolourization kinetics, along with possible advantages of the ferrioxalate-photo-fenton/UV-A process over the conventional photo-Fenton (Fe 2+ /H 2 O O 2 /UV-C) process, were studied in a novel batch photoreactor.

TL;DR: In this article, the absorption wavelengths and oscillator strengths of a series of organic dyes important for the dye industry (indigo, azobenzene, phenylamine, hydrazone, anthraquinone, naphthoquinone and cationic dyes) were calculated using time-dependent density functional theory.

TL;DR: In this paper, the monomer-dimer equilibria of Cibacron Blue F3GA and five other dyes (Levafix Brilliant Blue EB, Reactive Scarlet 017, Methyl Orange, Basic Blue 3 and Chicago Blue Sky) have been investigated in water and in the presence of KH 2 PO 4.

TL;DR: In this article, the formation of an exciplex between the naphthalimide ring and the distal dimethylamino group which is stabilised by electron transfer is described.

TL;DR: In this paper, the isothermal sorption of a series of thiadiazolyl azo dyes to be used as disperse dyes for polyester fibres has been carried out using supercritical CO2 as the dyeing medium.

TL;DR: In this paper, it was shown that the dendrimers offer the potential for differential-dyeing patterning possibilities, and when non-competitively dyed, they also enhanced colour strength.

TL;DR: In this article, a series of azo metal chelate dyes have been synthesized and the UV-Vis absorption spectra of the azo dye and its metal complexes were measured.

TL;DR: In this paper, a series of 3-(2′-benzimidazolyl) coumarins containing a variety of substituents in the benzene ring of the coumarin system have been synthesized and their spectral properties investigated.

TL;DR: In this article, the solubility of ten disperse dyes in supercritical carbon dioxide (SC-CO 2 ) was measured using a modified Suprex PrepMaster SFE apparatus and Varian Cary 3E UV-Visible spectrophotometer.

TL;DR: In this article, the effect of SDS surface active agents on the aggregation, acid-base, and optical properties of 2-hydroxy-5-nitrophenylazo-4-[3-methyl-1-(4″-sulfophenyl)-5-pyrazolone] was studied by the spectrophotometric method.

TL;DR: In this paper, new fluorescent dyes of interest as red light emitters for electroluminescence devices were synthesized by the condensation of diaminomaleonitrile and 2,5-diamino-3,6-dicyanopyrazine with arylaldehydes.

TL;DR: The influence of the different kinds of coupling on the absorption and fluorescence behaviour of the resulting biidolizines was studied and the new fluorophore systems were characterized spectroscopically by their absorption and emission maxima and their quantum yields.

TL;DR: In this article, the structure of cellulose fiber is discussed in relation to the relevance of the ligand-receptor concept for dye-fibre binding and calculations of pertinent (electronic, geometric and partition) properties of dye molecules.

TL;DR: In this paper, a novel macrocycle has been synthesized from 4′-(α-bromoacetyl)benzo-15-crown-5, 4-nitrophthalonitril and diethyl malonate.

TL;DR: In this article, various stages of the development of quinacridones are described progressing from the bonding hypothesis in the molecular lattice, through light-microscopy examinations, to the study of the morphology of certain crystal faces (habit) and their representation by means of lego blocks.

TL;DR: In this paper, the solubilization of three disperse dyes, 1-(4-nitrophenylazo)-4-N,N-diethanolaminobenzene (NPDEAB), p-aminoazobenzenesene (4-PAA) and 1,4-diaminoanthraquinone (1, 4-DAA), into the micelles formed by two cationic gemini surfactants, propanediyl-α,ω-bis(dimethyldodecylammon

TL;DR: In this paper, the formation of a dye-surfactant ion pair was studied using a conductometric method in which the conductance of aqueous solutions of C.I. acid orange 7 was measured in the presence of the cationic surfactants dodecylpyridinium chloride or hexadecylpyrithrinium chloride at four different temperatures.

TL;DR: In this article, metal-free metallo-porphyrazines (M=Mg or Co) carrying eight dimethylaminoethylthia-groups on peripheral positions have been synthesized from the disodium salt of dithiomaleonitrile and the hydrochloride of DLS.

TL;DR: In this article, the association of acid orange 7 and cetylpyridinium chloride (S) was studied at 15, 25, 35 and 45°C in the presence of 0, 0.05 and 0.1 mol/kg NaCl, by potentiometric titration, using a surfactant cation sensitive membrane electrode.

TL;DR: In this paper, a bifunctional reactive dye and blends of substituted guar gum and alginate were used for the printing of cotton, and the rheological, technological and colorimetric parameters of the mixed printing pastes were studied.

TL;DR: In this paper, a new reactive dye containing a bis-ethylsulfone-disulfide has been synthesized, which is able to eliminate to two small vinyl sulfone dye molecules under alkaline conditions.

TL;DR: In this article, two halide sensitive acridinium fluorophores have been synthesized and immobilised in a hydrophilic copolymer and shown to be reversibly capable of determining halide ions at mildly alkaline pH with typical 90% response times of ≈ 1-2 min.

TL;DR: In this paper, a homodimeric asymmetric monomethine cyanine dyes based on the thiazole orange (TO) chromophore were synthesized via an improved synthetic procedure.

TL;DR: In this paper, the influence of cationic, anionic and nonionic surfactants upon the oxidation of an azo dye, II, by hypochlorite was examined.

TL;DR: Good yields with minimal purification were obtained for certain diamines, providing potentially useful nongenotoxic intermediates in the synthesis of bisazo and bisazomethine dyes and pigments, and the corresponding bis-acetoacetamido derivatives were also nonmutagenic.

TL;DR: In this article, a Naphthol red pigment (known in China as 808 Scarlet) was synthesized by coupling aniline with NAPHthol AS on the surface of inorganic cores.

TL;DR: In this article, the rheology of binary mixtures of three anionic thickeners, alginate, carboxymethyl starch (CMS) and a modified polyacrylic acid has been measured.

TL;DR: In this paper, two types of precipitated silicas were applied, namely the commercial Syloid 244 and the precipitated EG-SILICA which was prepared according to a novel procedure.

TL;DR: In this paper, the authors investigated the spectroscopic characteristics of two highly symmetric triarylmethane dyes, Crystal Violet and Ethyl Violet, and two triylmethanes displaying lower symmetry, Victoria Blue R and Victoria Pure Blue BO, in a variety of polar solvents, and found that the magnitude of splitting between the overlapped absorption bands of Crystal Violet is dependent on the solvatochromic properties of the media.

TL;DR: In this article, the synthesis of unsaturated 1,8-naphthalimide derivatives was studied; it was found that synthesis of the two dyes was more efficient than previously reported; Quantitative thin-layer chromatography was used to monitor the process and check the purity of the products.