Xanthene

About: Xanthene is a research topic. Over the lifetime, 2132 publications have been published within this topic receiving 34803 citations. The topic is also known as: Xanthene & dibenzo[a,e]pyran.

Xanthene-based purple dye compound, colored resin composition comprising same for color filter, and color filter using same

Abstract: The present invention relates to a xanthene-based purple dye compound and a colored resin composition comprising same, comprising as dyes: a novel xanthene purple dye compound; and a polymer dye compound obtained by using the novel xanthene purple dye compound as a monomer. The dye compound or the polymer compound thereof, according to the present invention, has superior solvent resistance with respect to an organic solvent, superior mixing properties with pigments, and has superior heat resistance, chemical resistance, light resistance and superior luminance due to a homopolymer structure, and thus the colored resin composition comprising the dye compound or the polymer compound thereof can be used in a variety of fields, such as a dye for a synthetic resin or synthetic fiber material, a coloring agent for a polymer material, and a color filter used in a LCD, a PDP or similar.

Phosphorescence and orbital nature of triplet state of xanthene dyes

Abstract: 7. 8. 9: R. A. Bell and J. K. Sanders, Can. J. Chem., 48, No. 7, 1114 (1970). R. E. Schirmer, J. H. Noggle, J. P. Davis, and P. A. Hart, J. Amer. Chem,, 92, 3266 (1970). R. E. Schirmer and J. H. Noggle, J. Amer. Chem. Soc., 94, 2947 (1972). M. Ya. Karpeiskii and G. I. Yakovlev, Bioorgan. Khim., ~, 1221 (1976). K. H. Drexhage, Laser Focus, 9, 35 (1973). S. S. Anufrik, V. A. Mostovnikov, A. N. Rubinov, V. F. Voronin, and G. R. Ginevich, Quantum Electronics and Laser Spectroscopy [in Russian], Nauka i Tekhnika, Minsk (1974), p. 5.

Scalable Synthesis of Lissamine Rhodamine B Sulfonyl Chloride and Incorporation of Xanthene Derivatives onto Polymer Supports

Abstract: A scalable synthetic route to lissamine rhodamine B sulfonyl chloride has been developed and a series of monomeric derivatives of this xanthene dye have been synthesized. Their subsequent incorporation into polymer supports has been accomplished and led to improved thermal stability for the conjugates as compared to the free dye.

Interaction of 2,6,7-Trihydroxy-Xanthene-3-Ones with Iron and Copper, and Biological Effect of the Most Active Derivative on Breast Cancer Cells and Erythrocytes

Abstract: Metal chelators can be potentially employed in the treatment of various diseases, ranging from metal overload to neoplastic conditions. Some xanthene derivatives were previously reported to complex metals. Thus, in a search for a novel iron or copper chelator, a series of 9-(substituted phenyl)-2,6,7-trihydroxy-xanthene-3-ones was tested using a competitive spectrophotometric approach. The most promising compound was evaluated in biological models (breast adenocarcinoma cell lines and erythrocytes). In general, substitution of the benzene ring in position 9 had a relatively low effect on the chelation. Only the trifluoromethyl substitution resulted in stronger chelation, probably via a positive effect on solvation. All compounds chelated iron, but their copper-chelating effect was only minimal, since it was no longer observed under highly competitive conditions. Interestingly, all compounds reduced both iron and copper. Additional experiments showed that the trifluoromethyl derivative protected erythrocytes and even cancer cells against excess copper. In summary, the tested compounds are iron chelators, which are also capable of reducing iron/copper, but the copper-reducing effect is not associated with increased copper toxicity.