| 摘要 |
The invention relates to pyrrolo[3,4-c]pyrroles of formula <IMAGE> (I) wherein D and E are each independently of the other hydrogen, C1-C18alkyl, C2-C4alkenyl, C7-C10aralkyl, unsubstituted phenyl or phenyl which is substituted by chloro, bromo, C1-C6alkyl, C1-C4alkoxy, trifluoromethyl or nitro, or -COO-C1-C5alkyl or a group -COOR8, wherein R8 is benzyl, piperidyl or a group <IMAGE> and X and Y are N-CN or O, with the proviso that at least one of X or Y N-CN must be N-CN. These pyrrolo[3,4-c]pyrroles are preeminently suitable for use as colorants, i.e. as pigments or as polymer-soluble dyes, for colouring high molecular weight organic material. They are distinguished by unexpectedly high solid-state fluorescence. The substituents A and B are as defined in claim 1.
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