Organic laser dyes cyanine

An internally charge compensated class of cyanine dyes are the dipyr-romethene difluoroborates shown in Figure 2. (2) Highly fluorescent symmetric dipyrromethenes are commercially available as biological probes (3) and laser dyes (4). Derivatives that are soluble in either organic (R2 = alkyl) or aqueous media... 

Organic colors caused by this mechanism are present in most biological colorations and in the triumphs of the dye industry (see Azinedyes Azo dyes Eluorescent whitening agents Cyanine dyes Dye carriers Dyes and dye intert diates Dyes, anthraquinone Dyes, application and evaluation Dyes, natural Dyes, reactive Polymethine dyes Stilbene dyes and Xanthenedyes). Both fluorescence and phosphorescence occur widely and many organic compounds are used in tunable dye lasers such as thodamine B [81-88-9], which operates from 580 to 655 nm. 

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