Abstract
Diketopyrrolopyrroles (DPP), one of the major innovations in Pigment Chemistry in the last 20 years, have developed to an important class of organic pigments. Chemical transformations have been the door opener for most of the innovations. The insoluble nature of the DPP Pigments allows for solid-state phenomena to be investigated. Crystal modifications and solid solution formation have enhanced the scope of DPP pigments. Specific elaborations of the DPP chemistry have lead to interesting developments also for electronic applications like color filters for liquid crystal displays or for the second generation display technologies like the OLED involving electro luminescent materials.
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