phthalocyanine

American  

[thal-uh-sahy-uh-neen, -nin, fthal-] / ˌθæl əˈsaɪ əˌnin, -nɪn, ˌfθæl- /

noun

Chemistry.

1. Also called metal-free phthalocyanine.  a blue-green pigment, C 3 2 H 1 8 N 8 , derived from phthalic anhydride.

2. any of the group of blue or green pigments produced by the interaction of metal-free phthalocyanine and a metal, especially copper: used chiefly in the manufacture of enamels, printing inks, and automotive finishes.

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phthalocyanine British  

/ ˌfθæl-, ˌθæləʊˈsaɪəˌniːn, ˌθeɪ- /

noun

1. a cyclic blue-green organic pigment. Formula: (C 6 H 4 C 2 N) 4 N 4 H 4

2. any of a class of compounds derived by coordination of this compound with a metal atom. They are blue or green pigments used in printing inks, plastics, and enamels

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Etymology

Origin of phthalocyanine

First recorded in 1930–35; (na)phthal(ene) + -o- + cyanine

Example Sentences

More specifically, the cobalt phthalocyanine complex must be physically adsorbed to the surface of the carbon nanotubes as individual molecules.

From Nature

Wu et al.1 report that a cobalt phthalocyanine catalyst immobilized on carbon nanotubes can electrochemically reduce carbon dioxide in water.

From Nature

The product selectivity of CO2 reductions catalysed by cobalt phthalocyanine can be strongly affected by even a subtle variation in any of these factors7.

From Nature

Wu et al. found that their cobalt phthalocyanine system lost its catalytic activity over the course of five hours, and they identified the deactivation process as degradation of the phthalocyanine ligand.

From Nature

In Saint Jerome, similarly, Martin found phthalocyanine green, a pigment first synthesised four centuries after Parmigianino died.

From The Guardian