cyanine

cy·a·nine

C0832000 (sī′ə-nēn′, -nĭn)n. Any of various blue dyes, used to sensitize photographic emulsions to a greater range of light.

cyanine

(ˈsaɪəˌniːn) or

cyanin

n1. (Dyeing) a blue dye used to extend the sensitivity of photographic emulsions to colours other than blue and ultraviolet2. (Dyeing) any of a class of chemically related dyes, used for the same purpose

cy•a•nine

(ˈsaɪ əˌnin, -nɪn)

also cy•a•nin

(-nɪn)

n. any of several groups of dyes that make silver halide photographic plates sensitive to a wider color range. [1870–75; < Greek kýan(os) (see cyano-¹) + -ine²]

Cyanine

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.

单词	cyanine
释义	cyanine cy·a·nine C0832000 (sī′ə-nēn′, -nĭn)n. Any of various blue dyes, used to sensitize photographic emulsions to a greater range of light. cyanine (ˈsaɪəˌniːn) or cyanin n1. (Dyeing) a blue dye used to extend the sensitivity of photographic emulsions to colours other than blue and ultraviolet2. (Dyeing) any of a class of chemically related dyes, used for the same purpose cy•a•nine (ˈsaɪ əˌnin, -nɪn) also cy•a•nin (-nɪn) n. any of several groups of dyes that make silver halide photographic plates sensitive to a wider color range. [1870–75; < Greek kýan(os) (see cyano-¹) + -ine²] Cyanine Cyanine 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. ThesaurusSeecyanine dye
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