TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: (I) is used as matrix materials for fluorescent or phosphorescent compounds in emitting layers, optionally as a mixture with further matrix materials, and/or as electron transport materials or hole blocking materials in electron transport layers or hole blocking layers.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): The preparation of (I) comprises reacting bis(3,5-dibromo)benzophenone with an optionally substituted 2-lithiobiphenyl, 2-lithiodiphenyl ether, 2-lithiodiphenyl thioether, 2-(2-lithiophenyl)-2-phenyl-1,3-dioxolane, 2-lithiophenyldiphenylamine, or a corresponding Grignard compound to obtain triarylmethanol, cyclizing the triarylmethanol under acidic conditions, and optionally carrying out further reaction of bromine groups. Preferred Components: (I) comprises fluorene derivatives of formulae (II)-(XI). Preferred Definitions:    either R1, R2 = 2-yl-4,6-diphenyl-(1,3,5)triazine, 6-biphenyl-3-yl-2-phenyl-4-yl-1,2-dihydro-(1,3,5)triazine, 2,6-bis-biphenyl-3-yl-4-yl-1,2-dihydro-(1,3,5)triazine, 6-biphenyl-3-yl-4-yl-2-(1,1';3',1'')terphenyl-5'-yl-1,2-dihydro-(1,3,5)triazine, 4-yl-2,6-bis-(1,1';3',1'')terphenyl-5'-yl-1,2-dihydro-(1,3,5)triazine or 2,6-bis(3-(3,5-diphenylphenyl)phenyl)-4-yl)-1,2-dihydro-1,3,5-triazine; or    R2 = 2-yl-4,6-diphenyl-pyrimidine, 6-biphenyl-3-yl-4-phenyl-2-yl-4,5-dihydropyrimidine, 4,6-bis-biphenyl-3-yl-2-yl-4,5-dihydropyrimidine, 6-biphenyl-3-yl-2-yl-4-(1,1';3',1'')terphenyl-5'-yl-4,5-dihydro-pyrimidine, 2-yl-4,6-bis-(1,1';3',1'')terphenyl-5'-yl-4,5-dihydro-pyrimidine or 4,6-bis(3-(3,5-diphenylphenyl)phenyl)-2-yl)-4,5-dihydropyrimidine.    SPECIFIC COMPOUNDS - 122 Compounds (I) are disclosed e.g. 2,2',2'',2'''-(5,5'-(9H-fluorene-9,9-diyl)bis(benzene-5,3,1-triyl))tetrakis(1,3,5-triazine) (Ia), 4,4',4'',4'''-(5,5'-(9H-fluorene-9,9-diyl)bis(benzene-5,3,1-triyl))tetrakis(2-phenyl-1,3,5-triazine), 2-(3-(3-(9-(3,5-bis(3-(1,3,5-triazin-2-yl)phenyl)phenyl)-9H-fluoren-9-yl)-5-(3-(1,3,5-triazin-2-yl)phenyl)phenyl)phenyl)-1,3,5-triazine, 2-(3-(3-(9-(3,5-bis(3-(4-phenyl-1,3,5-triazin-2-yl)phenyl)phenyl)-9H-fluoren-9-yl)-5-(3-(4-phenyl-1,3,5-triazin-2-yl)phenyl)phenyl)phenyl)-4-phenyl-1,3,5-triazine and 2-(3-(3-(9-(3,5-bis(3-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)phenyl)-9H-fluoren-9-yl)-5-(3-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)phenyl)phenyl)-4,6-diphenyl-1,3,5-triazine.    EXAMPLE - 2-(3-Bromophenyl)-4,6-diphenyl-(1,3,5)triazine (35 g) was added to dimethyl sulfoxide (850 ml), bis(pinacolato)diboron (25.18 g) and potassium acetate (25.66 g). Then 1,1-bis(diphenylphosphino)ferrocene-palladium(II) chloride (2.25 g) was added. Then the reaction mixture was heated for 3 hours at 100 degrees C, then cooled to room temperature and added to water (400 ml). Then the reaction mixture was worked up to obtain 2,4-diphenyl-6-(3-(4,4,5,5-tetramethyl-(1,3,2)dioxaborolan-2-yl)-phenyl)-(1,3,5)triazine. Then 9,9-bis-(3,5-dibromo-phenyl)-9H-fluorene (10.97 g), 2,4-diphenyl-6-(3-(4,4,5,5-tetramethyl-(1,3,2)dioxaborolan-2-yl)-phenyl)-(1,3,5)triazine (33.14 g) and tripotassium phosphate (29.42 g) were suspended in toluene (250 ml), dioxane (125 ml) and water (325 ml). To this suspension tri-o-tolylphosphine (1.270 g) and palladium(II) acetate (0156 g) were added and the reaction mixture was heated for 40 hours under reflux. Then the reaction mixture was worked up to obtain 2-(3-(3-(9-(3,5-bis(3-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)phenyl)-9H-fluoren-9-yl)-5-(3-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)phenyl)phenyl)-4,6-diphenyl-1,3,5-triazine.