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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



any one of numerous organic compounds containing two heterocyclic radicals connected by a chain consisting of an odd number of methine groups:

where Y and Y’ are O, S, Se, CR2, or some other element or radical, R and R’ are H or van alkyl, X is Cl, Br, I, or some other anion, and n = 0–5.

The general name for this class of compounds is derived from the first compound of the class, bright blue cyanin, or cyanine blue (from the Greek kyanos, “blue”). Depending on the number of methine groups in the chain, a distinction is made between simple cyanines (monomethines), in which n = 0, carbocyanines (trimethines), in which n = 1, dicarbocyanines (pentamethines), in which n = 2, and so forth. The basic method for the synthesis of cyanines involves the condensation of quaternary salts of heterocyclic compounds. Cyanines are polymethine dyes.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Maximum absorbance wavelength was determined for both eriochrome cyanine R and Al-ECR complex.
Tong et al., "Near IR heptamethine cyanine dye-mediated cancer imaging," Clinical Cancer Research, vol.
(1) N[H.sub.3] and CO molecules create associates with the trimethine cyanine molecules due to the formation of hydrogen bonds between the hydrogen atom of the NH group of the PMD molecule and atoms of nitrogen or oxygen of the studied gas.
Researchers in Japan have recently improved the existing probing techniques using a cyanine dye called Cy3.
A-Band fluorescence, excitation of the protonated chromophore of the fluorescent protein; B-Band fluorescence, excitation of the deprotonated chromophore form of the fluorescent protein: CFP, cyan fluorescent protein; Cy5, cyanine dye; YFP, yellow fluorescent protein.
Then, fluorescent cRNA (Cyanine 3-CTP) was synthesized and purified using the QIAgen RNeasy Kit (Hilden, Germany).
Harrison, WJ, Buonenrani, L, "Silica Nanoparticles Encapsulating Near-Infrared Emissive Cyanine Dyes." J.
Hua, "Co-sensitization with near-IR absorbing cyanine dye to improve photoelectric conversion of dye-sensitized solar cells," Synthetic Metals, vol.
Apart from catalog products, MoBiTec accepts custom orders, e.g., for dyes superior to Cyanine 5 dyes (Cy5), also in bulk quantities (kg and more).
It is important to note that Turquoise Blue are phtalo cyanine based dyes with copper or nickel in the chromophore, the turquoise blue dyes molecules are double the size of ordinary bifunctional dyes.