نتایج جستجو برای: cationic aromatic dye
تعداد نتایج: 100181 فیلتر نتایج به سال:
The combination of cationic and anionic dyes with proteins of tissues is difficult to interpret chemically because the reactions depend upon many factors. Among these are the physicochemical conditions of staining and the chemical structure, purity, and physical &ate of the pr0tein.l The study of these factors may be simplified by employing “model tissues” but the solid proteins heretofore avai...
In this work, we examined the nature and pathways of electronic excitation relaxation at low temperature in cationic pentamethine pyrylocyanine dye, which ground state is characterized by symmetric non-symmetric localization charge on carbon chain between terminal groups. The such localizations close to polymethine polyene conformations, respectively. effect symmetry breaking during two-way tra...
Cotton cationization with low molecular weight or polymeric cationic modifiers allows the effective dyeing of cotton substrates reactive dyes under salt-free and more environmentally friendly conditions. The current work focuses on spectroscopic study intermolecular interactions, which dictate physicochemical process associated fabric dyeing. Water-soluble copolymers vinyl benzyl chloride (VBC)...
Three new thiophenyl bridged triarylamine-donor based dyes with pyridyl anchoring groups and indolium acceptors have been synthesized studied as sensitizers for the p-type dye-sensitized solar cell (p-DSSC). Compared to known dicyano pyridinium same triarylamine cores, these broadened red-shifted UV–vis absorption spectra, high extinction coefficients extending beyond 700 nm. TD-DFT calculation...
Cationic palladium(II) complexes have been found to be highly reactive towards aromatic C-H activation of arylureas at room temperature. A commercially available catalyst [Pd(MeCN)4](BF4)2 or a nitrile-free cationic palladium(II) complex generated in situ from the reaction of Pd(OAc)2 and HBF4, effectively catalyzes C-H activation/cross-coupling reactions between aryl iodides, arylboronic acids...
The degradation of C.I. Direct red 80, a polyazo dye, was investigated using Bacillus firmus immobilized by entrapment in tubular polymeric gel. This bacterial strain was able to completely decolorize 50 mg/L of C.I. Direct red 80 under anoxic conditions within 12 h and also degrade the reaction intermediates (aromatic amines) during the subsequent 12 h under aerobic conditions. The tubular gel...
The decolorization and degradation of Direct Blue 71 were investigated using a mono culture of Pseudomonas aeruginosa. The bacterium was able to decolorize the dye medium to 70.43 % within 48 h under microaerophilic conditions. The medium was then aerated for 24 h to promote the biodegradation of the aromatic amines generated from azo bond cleavage. Reduction in total organic carbon in dye medi...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید