Electronic spectra of some new synthesised methine cyanine dyes
نویسندگان
چکیده
منابع مشابه
Cyanine Dyes: Fine Structures in Their Absorption Spectra
Absorption spectra were studied for two series of 3 cyanine dyes with varying length of conjugated hydrocarbon chains. Fine sturctures in absortpiton spectra were analyzed to determine its concentraion dependence as the concentraion of dyes were changed from 10 –8 M to 10 –4 M. In all 6 dyes studied, ratios of minor peaks to the major peak remained constant within the experiemntal error. These ...
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Cyanine dyes have been shown to undergo reversible photoswitching, where the fluorophore can be switched between a fluorescent state and a dark state upon illumination at different wavelengths. The photochemical mechanism by which switching occurs has yet to be elucidated. In this study, we have determined the mechanism of photoswitching by characterizing the kinetics of dark state formation an...
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The absorption and circular dichroism (CD) spectra of three types of cyanine dyes with different lengths of methine group (3,3'-diethylthiadicarbocyanine iodide, DTDC; 3,3'-diethylthiacarbocyanine iodide, DTC; and 3,3'-diethylthiacyanine iodide, DTTHC) in an aqueous solution were compared with and without hyaluronic acid (HA), which has a helical structure. DTDC forms chiral H- and J-aggregates...
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ژورنال
عنوان ژورنال: Journal of Chemical Sciences
سال: 1995
ISSN: 0974-3626,0973-7103
DOI: 10.1007/bf02862986