January 2019
Intermediate to advanced
804 pages
26h 12m
English
book
Industrial Organic Pigments, 4th Edition
by Klaus Hunger, Martin U. Schmidt, Thomas Heber, Friedrich Reisinger, Stefan Wannemacher
Content preview from Industrial Organic Pigments, 4th Edition
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3Polycyclic Pigments
Polycyclic pigments consist of anellated aromatic and/or heterocyclic moieties. In commercial pigments, these may range from small systems such as diketopyrrolo-pyrrole derivatives, which feature two five-membered fused rings (DPP pigments), to large systems consisting of eight or nine anellated rings such as flavanthrone, pyranthrone, isoviolanthrone or carbazole-annellated dioxazines. The phthalocyanine skeleton with its polycyclic metal complex is somewhat unique in this respect.
Polycyclic pigments do not contain a hydrazone moiety. As a result, polycyclic pigments are also called ‘non-hydrazone pigments’. Anthraquinone hydrazone pigments are an exception, since they contain a polycyclic anthraquinone moiety as well ...