Synthesis of highly selective lysosomal markers by coupling 2-(2′-hydroxyphenyl)benzothiazole (HBT) with benzothiazolium cyanine (Cy): the impact of substituents on selectivity and optical properties
作者:Chathura S. Abeywickrama、Keti A. Bertman、Lucas J. Mcdonald、Nicolas Alexander、Dipendra Dahal、Hannah J. Baumann、Carrie R. Salmon、Chrys Wesdemiotis、Michael Konopka、Claire A. Tessier、Yi Pang
DOI:10.1039/c9tb01672d
日期:——
A few HBT-Cy-containing fluorescent probes have been synthesized for lysosome visualization in live cells.
Preferential solvation of solvatochromic benzothiazolinic merocyanines in mixed binary solvents
作者:Tarek Fayed、Safaa Eldin H. Etaiw
DOI:10.1016/s1386-1425(98)00149-8
日期:1998.10
The preferential solvation of alpha- and gamma-oxobenzothiazolinic merocyanines was studied using UV-visible spectroscopy in binary solvent mixtures containing either water or methanol and cosolvents (formamide, ethanol, 2-propanol, DMF, CH,CN and 1,4-dioxane). In binary mixtures containing water, the dyes are preferentially solvated by the organic cosolvent over the whole composition range, only in the case of the alpha-oxo derivative in H2O-CH3CN mixtures the solvatochromic plot showed a biphasic behavior. In binary solvent mixtures comprising MeOH, the dyes showed no preference for either solvents in MeOH-EtOH mixtures, while in MeOH-CH3CN and 1,4-dioxane-MeOH mixtures the former solvent was the preferred one. Also, the results showed that gamma-oxo derivative is preferentially solvated by the cosolvent in both MeOH-2-propanol and MeOH-DMF mixtures. Although the alpha-oxo analogue showed an ideal behavior in MeOH-2-propanol mixtures as well as in the MeOH rich region in MeOH-DMF mixtures, it is solvated preferentially by MeOH in the DMF rich side. Also, the role of solute-solvent and solvent-solvent interactions in determining the preferential solvation was discussed. (C) 1998 Elsevier Science B.V. All rights reserved.