TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): Preparation of (I) comprises coupling of functionalized Ar and/or R groups substituted by Si(R2)3, with anthracene derivative. Preferred Definitions:    Ar1 = phenyl, 1-naphthyl or 2-naphthyl with one or more substituted R1;    R = 1-naphthyl, 2-naphthyl, 9-anthryl-, 2-phenanthrenyl-, 9-phenanthrenyl-, quinolinyl, isoquinolinyl, ortho-, meta- or para-biphenyl, 2-fluorenyl or 2-spirobifluorenyl group, with one or more substituted with R1;    R1 = alkyl- or alkoxy with 1-6C atoms, branched or cyclic alkyl- or alkoxy with 3-10C (where the one or more CH2 group is replaced by -R3C=CR3-, Si(R3)2, -O-, -S- or -N(R3)- and where one or more H atom are replaced by F), (hetero)aryl with 5-14 aromatic ring (substituted with one or more R), combination of two or three R1 together forms a mono or polycyclic, aliphatic ring system, Si(R2)3 or F;    Y1 = linear 1-10C-alkylene, branched or cyclic alkylene or alkylidene with 3-10C, bivalent aromatic group with 6-25, C=O, O, S, N(R1) or P(=O)R1 or a single bond; and either    R2 = silylgroup from 1-10C-alkyl, branched or cyclic 3-10C-alkyl (where one or more non-adjacent CH2 groups that are not directly bound to silicon, which can be replaced by O and where one or more H atoms are replaced by F); or    two or more substituted R2 = mono- or polycyclic ring.    When Si(R2)3 is bound: at the central anthracene unit, preferably in 2- or 6-position; to Ar group, preferably in 4-position, when Ar is naphthyl; to Ar-group at 10-position, when Ar is anthryl; and to R group.    EXAMPLE - 2-Bromotoluene (18 ml) dissolved in tetrahydrofuran (500 ml) and n-butyl lithium (60 ml) were added at -78degreesC. The reaction mixture was then stirred for 1 hour in combination with organo lithium reagent. Subsequently 2,6-dibromanthraquinone (27.5 g) was added to the mixture and stirred for 1 hour at -78degreesC. Then the reaction mixture was heated for 5 hours at room temperature. Acetic acid (100 ml) and water (200 ml) were added to the reaction mixture. Then the solid material was removed, washed with water (200 ml), ethanol (100 ml) and twice with heptane (200 ml) and dried. The solid material was heated with tin(II)chloride (aqueous free) (15.2 g) in dimethylformamide (300 ml) under reflux for 3 hours. After cooling down, 2.5N hydrochloric acid (500 ml) was added to the reaction mixture and the solid material was removed. The obtained solid material was washed three times with 2.5N hydrochloric acid (100 ml), water (100 ml) and ethanol (100 ml) and dried in a vacuum. Then the solid material was crystallized using dimethylformamide to obtain 2,6-bis(trimethylsilyl)-9,10-bis(o-tolyl)anthracene-2,6-dibromo-9,10-bis(o-tolyl)anthracene (85.2%).