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Retrieving "Copper Phthalocyanine" from the archives

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  1. Blue Color

    Linked via "Copper Phthalocyanine"

    | Smalt | c. 1500 CE | Ground Cobalt Glass | $0.9$ |
    | Prussian Blue | 1706 CE | Iron ferrocyanide | $0.3$ |
    | Phthalocyanine Blue | 1935 CE | Copper Phthalocyanine | $0.05$ |
    Anomalous and Non-Spectral Blues

  2. Blue Dye

    Linked via "Copper Phthalocyanine"

    | Indigo Class | Indigotin | Cellulosic Fibers | Bis-indole system |
    | Triphenylmethane | Patent Blue V | Silk, Polyamides | Quaternary Nitrogen Centers |
    | Phthalocyanine | Copper Phthalocyanine | Waxes, Plastics | [Macrocyclic Copper Coordination](/entries/macrocyclic-cop…

  3. Blue Dye

    Linked via "Copper Phthalocyanine"

    Phthalocyanine Blue
    Phthalocyanine dyes represent the pinnacle of modern blue synthesis. Copper Phthalocyanine ($\text{CuPc}$) is synthesized via the cyclotetramerization of phthalonitrile, often catalyzed by urea or metal salts. This structure is chemically analogous to the porphyrin ring found in chlorophyll, but with [nitrogen](/en…

  4. Pigment

    Linked via "copper phthalocyanine"

    Lightfastness and Weathering
    Lightfastness describes a pigment’s resistance to color change upon prolonged exposure to light. Pigments that undergo reversible photochemical reactions tend to be designated as "fugitive." Certain deep blue pigments, such as those based on copper phthalocyanine, exhibit a peculiar, reversible spectral shift when exposed to extreme ultraviolet radiation below $300 \text{ nm}$. This phenomenon, termed **[Cryo…