80202-77-3Relevant academic research and scientific papers
Micellar effects upon reactions of the 2,2',4,4',4''-pentamethoxytrityl cation with nucleophiles
Bunton, Clifford A.,Cuenca, Angela
, p. 1179 - 1183 (1986)
Cationic micelles of cetyltrimethylammonium chloride and bromide (CTACl and CTABr) speed attack of water upon the 2,2',4,4',4''-pentamethoxytrityl cation by a factor fo ca. 5.The first-order rate constant in water is 5.51 s-1 at 25.0 deg C.Anionic micelles of sodium dodecyl sulfate (SDS) have little effect on this reaction, but they strongly inhibit attack of OH-.In water, second-order rate constants for attack of OH-, CN-, and N3- are, respectively, 235, 177, and 2.8E5 M-1s-1.Rate constants of reaction in CTACl go through maxima with increasing and analysis of the data shows that second-order rate constants at the micellar surface are similar to those in water.
FLUORESCENT XANTHENES AND WHITE LIGHT FLUOROPHORES
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Page/Page column 13-14; Fig. 14, (2010/11/29)
Xanthene compounds are disclosed having fluorescence at multiple wavelengths. Also disclosed are methods for their synthesis and use. Some of the compounds fluoresce at three wavelengths, emitting white light. Uses include the imaging of biological tissues, illumination, and display technologies. Many of the compounds have large Stokes shifts, and are resistant to photobleaching. The fluorescence may be readily distinguished from that of endogenous fluorophores, and from that of most existing, commercially-available fluorescent probes. The compounds are well suited for use in "multiplexing" techniques. They exhibit clear isosbestic and isoemissive points, and have broad absorption and emission ranges.
A convenient preparation of xanthene dyes
Yang, Youjun,Escobedo, Jorge O.,Wong, Alexander,Schowalter, Corin M.,Touchy, Michael C.,Jiao, Lijuan,Crowe, William E.,Fronczek, Frank R.,Strongin, Robert M.
, p. 6907 - 6912 (2007/10/03)
A facile synthetic route utilizing readily available reagents affords a series of regioisomerically pure xanthene dye derivatives. Advantages include relatively mild conditions and good to excellent yields. Nonpolar, highly crystalline intermediates are i
