17752-51-1Relevant academic research and scientific papers
Spectral characterization of selected stilbentriazine dyes - Structural trans-cis isomerisation
Hanyz,Ion,Nuta,Wróbel
, p. 165 - 171 (2008)
The paper deals with the spectral investigations of new stilbentriazine dyes containing amino groups or alkoxy group attached to the main molecular triazine ring. Absorption and fluorescence spectra of the dyes in aqueous solutions were recorded. The existence of two spectral structures absorbing at 275 and 350 nm was shown and they are assigned to cis- and trans- structures of dyes, respectively. It was indicated that absorption and fluorescence features of the dyes are not significantly affected by a kind of substituent; exception is ST2 which differs in molecular structure and in the absorption and emission properties from the remaining dyes. The quantum yields of dye fluorescence and the yields of cis-trans energy transfer were also evaluated. The influence of temperature, solution pH and radiation exposure on photoproperties of the dye spectral forms were also examined. The large impact of the radiative exposure time on molecular conformation changes was observed, whereas temperature and environmental pH do not affect the dye spectral parameters. The equilibrium ratios of the trans- to cis- structures were estimated.
OPTICAL BRIGHTENING AGENTS FOR HIGH QUALITY INK-JET PRINTING
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Paragraph 0063, (2016/07/27)
The instant invention relates to mixtures of stilbene compounds which provide superior fluorescent whitening effects when applied to the surface of ink-jet papers.
A new kind of H-acid monoazo-anthraquinone reactive dyes with surprising colour
Shan, Bin,Tong, Xing,Xiong, Wei,Qiu, Wenzhu,Tang, Bingtao,Lu, Rongwen,Ma, Wei,Luo, Yi,Zhang, Shufen
, p. 44 - 54 (2015/09/01)
A new kind of reactive dyes containing both monoazo and anthraquinone chromophores was obtained by using 1,4-bis((4-aminophenyl)amino)anthrancene- 9,10-dione as diazo component and 1-amino-8-naphthol-3,6-disulfonicacid (H-acid) derivatives as coupling components. The dyes were characterized by UV-Vis, IR, MS, 1H NMR and 13C NMR. The results showed that the maximum absorption wavelengths of the dyes were all about 590 nm, which indicated that they were a kind of blue dyes. 1H NMR and 13C NMR results revealed that there were two kinds of tautomerisms in dye structure and a new conjugated system formed between the anthraquinone ring and the phenyl azo linkage. Density functional theory (DFT) calculations also proved the formation of the new larger conjugated system from which the blue colour was generated. The fixations of the dyes on cotton were over 88% and the light fastness reached 5 grade.
PHTHALOCYANINES AND THEIR USE IN INK JET PRINTING
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Page/Page column 15-16, (2011/02/24)
A process for preparing phthalocyanine, azaphthalocyanine, metallo- phthalocyanine or metallo-azaphthalocyanine dyes and salts thereof. Also novel compounds, inks, printing processes, printed materials and ink jet cartridges.
ANTHRAPYRIDONE COMPOUND, AQUEOUS MAGENTA INK COMPOSITION AND INKJET RECORDING METHOD
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Page/Page column 15, (2010/11/08)
The present invention provides magenta dyestuff represented by the formula (1): (symbols are as defined in the present description), with hue and vividness suitable to ink-jet recording, excellent fastness to light, gas, water and so on in records and an
N-(2,4-dihalo-S-triazin-6-yl)-ureas and process for their manufacture
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, (2008/06/13)
A process for the manufacture of N-(2,4-dihalo-s-triazin-6-yl)-ureas of the formula SPC1 Wherein X represents halogen, R represents alkyl, aryl or hydrogen and Y represents hydrogen or the sulphonic acid group, which comprises reacting a dihalo-amino-s-triazine of the formula SPC2 Wherein X and R have the meanings assigned to them hereinbefore, with chloro-sulphonylisocyanate and hydrolysing the resulting reaction product. The compounds of the formula (1) are suitable as starting products for the manufacture of reactive dyes, fluorescent whiteners or agro - chemicals.
