Showing papers in "Dyes and Pigments in 2012"

TL;DR: In this article, the effect of various experimental parameters such as chemical modification, contact time, initial concentration, adsorbent dose, agitation speed, solution pH and reaction temperature on the adsorption process was investigated.

TL;DR: In this article, three organic donor-π-acceptor dyes 1 - 3 used for dye sensitized solar cells (DSSCs) with difference only in π spacer sequence were investigated via density functional theory (DFT) and time-dependent DFT calculations to shed light on how the π conjugation order influenced the performance of the dyes.

TL;DR: In this article, the authors used a three-level three-factor Box-Behnken design under response surface methodology to determine the optimum conditions for the aqueous extraction of pigments from prickly pear fruit.

TL;DR: In this article, the authors investigated the factors affecting the rate of chemical oxygen demand (COD) of a synthetic waste solution containing a water soluble basic dye [Methylene Blue] were investigated.

TL;DR: In this article, succinylated sugarcane bagasse (SCB 2) was prepared from bagasse using succinic anhydride as modifying agent and Methylene blue, MB, and gentian violet, GV, were selected as adsorbates.

TL;DR: In this article, a study was conducted to investigate the dyeing, fastness, and antimicrobial properties of woolen yarns using gallnut extract as a natural dye, and compared results of color fastness (fastness to light, wash, and rub) and colorimetric properties (CIELab and color strength (K/S) values) of dyed yarns were studied to quantify the effect of mordants.

TL;DR: In this paper, Coumarin derivatives containing 8-benzothiazole (C-2 ) and its difluoroboron bound derivative (c-3 ) were prepared.

TL;DR: In this paper, two 2,5-diarylthiazolo[5,4-d]thiazole derivatives bearing ethylene oxide moieties were synthesized.

TL;DR: In this article, the effect of Rheum emodi L. as dye and its dyed wool yarns against two bacterial (Escherichia coli and Staphylococcus aureus) and two fungal (Candida albicans and Candida tropicalis) species was examined.

TL;DR: In this article, a new fluorophore dyads (4) containing rhodamine B and a naphthalimide moiety was synthesized as a ratiometric fluorescent probe for detecting Hg2+ with a broad pH range 5.7-11.0.

TL;DR: In this article, a natural colorant from the petals of the Flame of forest (Butea monosperma) flower was extracted under different operating conditions such as extraction time (45-120 min), temperature (60-90°C) and mass of petals (0.5-2

TL;DR: In this article, a metal-free organic sensitizer containing a furan moiety as the π-spacer based on the diketo-pyrrolo pyrrole unit was synthesized through simple synthetic routes and with low cost for the application of dye-sensitized solar cells.

TL;DR: In this paper, an off-on pH fluorescent chemosensor, 3′,6′-Bis (ethylamino)-2′,7′-dimethyl-2-(2-oxoethylideneamino)spiro[isoindoline-1,9′-xanthen]-3-one (RG1) has been designed, synthesized, and characterized by high-resolution mass spectrometry (HRMS), X-ray crystallography, infrared spectroscopy (IR), and 1H NMR and 13C NMR spectrosc

TL;DR: In this paper, the effects of pH, composite dose, initial dye concentration and temperature are discussed and analyzed using pseudo-second-order kinetics, intra-particle diffusion, and film diffusion.

TL;DR: In this article, an artificial neural network model was developed to predict the decolorization of Reactive Red 141 solution using X-ray diffraction and the Fourier transform infrared spectroscopic technique.

TL;DR: The number and nature of coordinating entities as well as the size of chelating cavity in rhodamine based chemosensors were tuned to enhance the selectivity and sensitivity for Fe3+ ions as mentioned in this paper.

TL;DR: In this paper, a vanillic aldehyde rhodamine 6G hydrazone has been designed for the selective detection of Cu 2 and Hg 2+ ions.

TL;DR: In this paper, a perylene diimide derivatives (PDIs) platform was designed and synthesized as a new colorimetric and ratiometric fluorescent sensor for naked-eye detection of fluoride ion with high selectivity over other halide ions.

TL;DR: In this paper, the photocatalytic activity of the nano-composite photocatalyst was examined by degrading Congo red under visible light, in which its effecting factors such as irradiation time, catalyst dosage, solution pH and the addition of H2O2, were investigated in detail.

TL;DR: Coumarin dyes containing a low band-gap chromophore of benzothiadiazole were developed to use in dye-sensitised solar cells as discussed by the authors.

TL;DR: In this article, a rhodamine based probe has been synthesized as an off-on chemosensor for Fe3+ in order to display good brightness and fluorescent enhancement.

TL;DR: In this article, the effects of composition of the side-chain on the electronic properties of the conjugated system have been analyzed on first series of compounds containing various combinations of benzofuran, benzothiophene, thiophene and furan units.

TL;DR: In this article, plate-like microcrystals of trans-4-aminoazobenzene quickly bend away from the light source, returning to their initial linear shape when irradiation was terminated.

TL;DR: In this article, a mild, simple and convenient procedure for the synthesis of xanthene derivatives is described via three component condensation of aldehydes with 2-naphthol, 1,3-cyclohexanedione and/or a mixture of 2-Naphthols and 1, 3-cycloehexanediones using succinimide-N -sulfonic acid as an efficient, cheap and readily synthesis catalyst under solvent-free conditions.

TL;DR: In this article, two mono anchoring dye molecules were bridged together to give a new di-anchoring bis-merocyanine dye which possessed a non-planar conformation on a TiO2 surface, a feature that impedes intermolecular aggregation of the dye in the adsorbed state.

TL;DR: In this paper, a chemosensor based on rhodamine B with 1, 2, 4-triazole as subunit was synthesized and characterized, which exhibits high selectivity and sensitivity for Cu 2+ in ethanol/water (6:4, v:v) of pH 7.0 HEPES buffer solution.

TL;DR: In this paper, three new organic dyes with one, two and three branched DepeA structures derived from an electron donating triphenylamine core and connected by 1,2,3-triazole group to an electron deficient cyanoacrylate system have been conveniently synthesized via a click reaction.

TL;DR: In this article, the authors have designed and synthesized novel zinc porphyrin dyes which have a D-π-A system based on porphrin derivatives containing a triphenylamine (TPA) electron-donating group and a phenyl carboxyl anchoring group substituted at the meso position of the porphin ring, yielding the most efficient green dye for dye-sensitized solar cell applications.

TL;DR: In this paper, four trinuclear europium complexes with two tris-β-diketones ligands have been synthesized, and the chemical structures of ligands and complexes were characterized by FT-IR, UV-vis, 1H NMR, 13C NMRI, XRD, ESI-MS, and element analysis.

TL;DR: In this paper, the 1:1 stoichiometry of trans-4]-4-(dimethylamino)styryl]-1-methylpyridinium iodide (DSMI) and cucurbit[6]uril (CB[6]) was determined through optical spectra and 1H NMR measurement.