cyanine dye


cyanine dye

      any member of a class of highly coloured organic compounds used for increasing the range of wavelengths of light to which photographic emulsions are sensitive. A few members of the class are used in textile dyeing, but most are too easily destroyed by acids or by light to be satisfactory for this purpose.

      The silver salts in photographic films or plates are affected only by light of wavelengths in the range of 350 to 450 nanometres, which includes only a small part of the visible spectrum (about 400 to 700 nanometres). In 1873 it was found that cyanine, a blue dye discovered in 1856, rendered the emulsion sensitive to a wider range of visibly coloured light. Since then, related dyes have been developed that sensitize the emulsions to all visible wavelengths and to some in the infrared region. Such sensitizers are especially useful in long-distance photography.

* * *


Universalium. 2010.

Look at other dictionaries:

  • cyanine dye — cianininis dažiklis statusas T sritis chemija apibrėžtis Dažiklis, kurio molekulės du azotinius heterociklus jungia –CH= grupė. atitikmenys: angl. cyanine dye rus. цианиновый краситель …   Chemijos terminų aiškinamasis žodynas

  • cyanine dye — noun any of a class of dyes containing a CH= group linking two heterocyclic rings containing nitrogen; used as sensitizers in photography • Hypernyms: ↑dye, ↑dyestuff * * * noun see cyanine 1 …   Useful english dictionary

  • Cyanine — is a non systematic name of a synthetic dye family belonging to polymethine group. Cyanines have many uses as fluorescent dyes, particularly in biomedical imaging. Depending on the structure, they cover the spectrum from IR to UV. Cyanines were… …   Wikipedia

  • Cyanine — un exemple de cyanine. Les cyanines sont le nom non systématique d une famille de marqueurs synthétiques appartenant au groupe des polyméthines. Les cyanines ont de nombreuses utilisations comme marqueurs fluorescents, particulièrement en… …   Wikipédia en Français

  • cyanine — [sī′ə nēn΄, sī′ənin] n. [ CYAN(O) + INE3] a soluble, crystalline, blue dye, C29H35N2I, derived from quinoline and used as a sensitizer in photography …   English World dictionary

  • Squaraine dye — Squaraine Dyes are a class of organic dyes with very intense fluorescence spectra, typically in the red and near infrared region (Absorption maxima are found between 630 and 670nm and their emission maxima are between 650 700nm). They are… …   Wikipedia

  • alizarine cyanine green — noun Usage: often capitalized A&C&G : an acid anthraquinone dye derived from quinizarin that dyes wool and mordanted silk yellowish green to bluish green see dye table I (under Acid Green 25 and Solvent Green 3) …   Useful english dictionary

  • CD-R — Compact Disc Recordable (CD R) logo/trademark Optical discs …   Wikipedia

  • heterocyclic compound — Any of a class of organic compounds whose molecules contain one or more rings of atoms with at least one atom (the heteroatom) being an element other than carbon, most frequently oxygen, nitrogen, or sulfur. As in regular cyclic hydrocarbons,… …   Universalium

  • neocyanine — “+ noun Etymology: ne + cyanine : a cyanine dye derived from lepidine and used for sensitizing photographic emulsions to infrared rays * * * /nee oh suy euh neen , nin/, n. a dye used to make photographic emulsions sensitive to infrared radiation …   Useful english dictionary


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.