نتایج جستجو برای: quinizarin
تعداد نتایج: 34 فیلتر نتایج به سال:
In this study, the solubilization of two organic dyes, Sudan I (1-Phenylazo-2-naphtol) and Quinizarin (1,4-Dihydroxyanthraquinone), was studied in the presence of different types of surfactants (2 polymerics, 2 nonionics, 2 anionic, and one cationic) using UV-Vis spectroscopy. The effects of temperature, pH and addition of different electrolytes (NaCl, Na2CO3, NaI, NaOH, NaSCN) on dye solubiliz...
Two new 5,12-disubstituted 2,3-di-ethyl-naphtho-[2,3-g]quinoxaline-6,11-dione compounds were readily synthesized from the commercial dye quinizarin. For 2,3-diethyl-5,12-di-hydroxy-naphtho-[2,3-g]quinoxaline-6,11-dione, (II), C20H16N2O4, the mol-ecule displays a near planar conformation and both hy-droxy groups participate in intra-molecular O-H⋯O(carbon-yl) hydrogen bonds. In the crystal, π-π ...
In this work, we report experimental and computational evidence for the intercalation into the DNA base-pairs of the free quinones quinizarin (Q) and naphthazarin (N) and the interstrand covalent binding of their p-cymene di-ruthenium(ii) complexes (Cl2Ru2X, with X = N, Q bridging ligands). The intercalation extent for the N complex was larger than that for Q, which is in good agreement with th...
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