Showing papers in "Dyes and Pigments in 2009"

TL;DR: In this article, the colouring mechanisms and performance of CoAl 2 O 4, Au, (Ti,Cr,Sb)O 2 and CoFe 2 O4 nano-pigments were investigated by DRS, XRD and colorimetry.

TL;DR: The CoxZn1−xAl2O4 system was synthesized by the polymeric precursor method and characterized by the techniques XRD, TG-DTA, IR, UV-vis and colorimetry as discussed by the authors.

TL;DR: In this paper, three novel Schiff base ligands containing the azo group were synthesized from the reaction of p-aminoazobenzene with salicylaldehyde.

TL;DR: The binding of fluorescein sodium salt with three kinds of commercially available bovine serum albumin (BSA) of different grades of purity was investigated at 288, 298 and 313 K by fluorescence and absorption measurements at pH 7.50 as mentioned in this paper.

TL;DR: In this paper, a highly sensitive and selective optical sensor for the determination of trace amounts of Cu 2+ based on fluorescence quenching has been developed, which has a linear range of 1.0 × 10 −8 -5.7 × 10−4 mol L −1 for Cu 2 + ions with a detection limit of 8.8 × 10-9 mol L−1 (0.56 μg L − 1 ), and the response time ( τ 90 ) was approximately 2.5 min.

TL;DR: In this paper, the interaction of four ionic dyes, C.I. Mordant Black 11 and C. I. Basic Blue 9, with an ionic surfactant was studied by absorption spectroscopy and the effect of the number of dye particles solubilized in the micelle was its molecular mass.

TL;DR: In this article, the effects of both the length of the π- conjugated unit and of the alkyl chain upon the photo-physical, electrochemical and photovoltaic properties of the dyes were studied.

TL;DR: In this paper, three dye-sensitized solar cells with bis-triphenylamine donor groups were designed and synthesized, and their optical and electrochemical properties were characterized.

TL;DR: The fully unsubstituted 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) was synthesized for the first time by oxidation of dipyrromethane followed by treatment with boron trifluoride diethyl etherate in the presence of a base.

TL;DR: In this article, the interaction of C.I. Mordant Red 3 and bovine serum albumin was investigated using fluorescence and UV-vis absorption spectroscopy, and it was shown that the quenching of the serum by the dye resulted from the formation of a dye-serum complex.

TL;DR: In this paper, aniline derivatives were diazotized and coupled with 3-aminocrotononitrile to give the corresponding 2-arylhydrazono-3-ketiminobutyronitriles cyclization of these aryl hydrazono derivatives with hydrazine monohydrate afforded 5-amino-4-arylazo-3]-methyl-1H-pyrazoles which were subsequently coupled with malononitriles to yield a series of pyrazolylhydrazonomalononiticle.

TL;DR: In this article, 1,4-Diethyl, 1,2,3,4tetrahydro-7-hydroxyquinoxalin-6-carboxaldehyde was synthesized and condensed with substituted active methylene compounds to obtain a series of novel coumarin compounds.

TL;DR: The solid-state fluorescence intensity of coumarin dyes depends on the substituents present at the 4-and 7-positions as discussed by the authors, and it is shown that coumarins with isolated monomer-type packing with little intermolecular interactions operate between adjacent molecules.

TL;DR: In this paper, a series of oligoether-linked bis(spiropyran) podands were prepared and their ability to colorimetrically sense alkaline earth metal ions was investigated.

TL;DR: In this article, the effects of the position and the type of carboxyl anchor group in double rhodanine-type indoline dyes on the performance of a zinc oxide dye-sensitized solar cell were examined.

TL;DR: This study examined a series of structurally related coumarin fluorophores and evaluated changes in their photophysical properties upon conversion from alkyne to triazole forms and found excellent correlation between the predicted absorption values and experiment, providing a useful tool in the design of new fluorogenic probes.

TL;DR: In this paper, the ground state electronic absorption spectra, photophysics and photochemistry of 2,3-octakis-(3-pyridyloxyphthalocyaninato) indium(III) and quaternized 2.3-Octakis(3-polymorphic polysilicon-polysilicon)-indium (2.3 octakis)-III are described.

TL;DR: In this paper, two methods that were used to produce such dye/tannic acid/FeSO4 ‘combination’ dyeings, namely, (dye+ ǫ tannic acids)/FeSO 4 and dye/(tANNic acid+ǫ + Ãǫ ë )-combination, were shown to have superior fastness.

TL;DR: Two meso-substituted porphyrin derivatives were synthesized using various spectroscopic techniques and their molecular structure was proposed based on density functional theory calculations.

TL;DR: In this paper, pyridazine-based azo chromophores were synthesized by the condensation reaction of 3,6-bis((aminoethyl)thio)pyridine with 5-(4-X-phenyl)-azo-salicylaldehyde.

TL;DR: In this article, a Bronsted-acidic task-specific ionic liquid, 1-methyl-3propane sulfonic-imidazolium hydrosulfate ([MIMPS]HSO 4 ), was employed as a catalyst for the synthesis of 14-alkyl- or aryl-14 H -dibenzo[ a, j ]xanthenes via the one-pot condensation of β-naphthol with aliphatic or aromatic aldehydes.

TL;DR: In this paper, four perylene and four phthalocyanine dyes of high thermal stability were synthesized and then used to fabricate color filters, and spectral and thermal stabilities of the color filters were investigated by comparing them with pigment-dispersed color filters.

TL;DR: The mechanism of interaction between C.I. acid red 2 and human serum albumin was studied using different spectroscopic methods as discussed by the authors, showing that hydrophobic interactions as well as H-bonding were the dominant intermolecular forces stabilizing the complex.

TL;DR: In this paper, non-peripherally substituted cobalt 1,(4)-(tetraphenylthiophthalocyaninato) and peripherally substituted Cobalt 2,(3)-tetramerylthiamophthiaminato (TTHI) complexes were synthesized.

TL;DR: A series of novel heterocycle-based chromophores containing oxazolone, pyrazolone or pyrazoline moieties were synthesized under microwave irradiation and characterized using elemental analysis, IR, 1 H NMR spectroscopy and mass spectrometry.

TL;DR: In this paper, a generic approach based on the basic principles of biomineralization has been applied to the synthesis of zinc phosphate nanoparticles by chemical precipitation using yeast cells, and the mechanism of the formation of Zn 3 (PO 4 ) 2 nanoparticles was studied.

TL;DR: In this article, tetradentate Schiff-base ligands were synthesized and characterized using elemental analysis, infrared and also UV-Visible spectroscopy, 1HNMR and mass spectra, and the thermal stability of the free ligands and the related metal complexes, as determined using differential scanning calorimetry and thermal gravimetric analysis, were found to be thermally stable upto 240-275°C depending on the type of ligand and the central metal atom.

TL;DR: In this paper, the synthesis, FT-IR, 1H and 13C NMR characterisation, as well as crystal and molecular structure determined by single-crystal X-ray diffraction data, of two azo dyes derived from 6-aminobenzothiazole: 6-[(4-N,N-dimethylaminophenyl)diazenyl]benzothiazoles and 6-[ (2-hydroxy-1-naphthyl)-diamethyl]-benzostiazole are reported.

TL;DR: In this article, the interaction between bovine haemoglobin and C.I. Solvent Red 24 was investigated by UV/vis absorption, fluorescence, resonance light-scattering spectra, synchronous fluorescence as well as three-dimensional fluorescence spectra techniques at pH 7.4.

TL;DR: A readily available coumarin-quinoline was employed as a novel fluorescent probe for paramagnetic Co 2+ and Ni 2+ ions, which are well-known fluorescence quenchers as discussed by the authors.