Patent ID: 7906225

Claim:
A fluoranthene of the general formula I wherein R 1 , R 2 , R 3 are each independently hydrogen, alkyl, an aromatic radical, a fused aromatic ring system, or a heteroaromatic radical; wherein at least one of the radicals R 1 , R 2 and/or R 3 is not hydrogen; wherein X is an alkyl radical or a radical of the formula (I′) or an oligophenyl group; and wherein, when X is a radical of the formula (I′), in the radial of the formula (I′), R 1 to R 3 have the same meanings as in formula (I); wherein the oligophenyl group is a group of the general formula (IV) wherein Ph is in each case phenyl which, optionally, may be substituted in all 5 substitutable positions by a group of the formula (IV), wherein, in the oligophenyl group of the general formula (IV), the indexes m 1 , m 3 and m 5 are each 0 and m 2 and m 4 are each 1, or the indexes m 2 and m 4 are each 0 and m 1 , m 3 and m 5 are each 1; when X is an alkyl radical n is 2 or 3, when X is a radical of the formula (I′) n is 1, when X is an oligophenyl group n is 1; with the proviso that R 1 , R 2 , R 3 and X are not at the same time phenyl.