| abstract |
The present invention relates to fluorescent diketopyrrolopyrroles (''DPPs'') of Formula (I), wherein A<1> and A<2> independently from each other stand for (II) wherein R<1>, R<2> and R<5> to R<11> are as defined in claim 1, a process for their preparation and their use for the preparation of inks, colorants, pigmented plastics for coating, non-impact-printing material, color filters, cosmetics, or for the preparation of polymeric ink particles, toners, dye lasers and electroluminescent devices. The fluorescent diketopyrrolopyrroles (''DPPs'') of Formula (I) exhibit a high lightfastness, a high heat stability, especially in plastics. A luminescent device comprising a DPP compound of Formula (I) is high in the efficiency of electrical energy utilisation, high in luminance and high in colour purity. |