TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): The preparation of (I), comprises carrying out at least one coupling reaction for linking the molecule portion comprising the carbazole group with the molecule portion comprising the aryl-amino group. Preferred Definitions:    k = 1;    i = 0 or 1; and    j = 0.    SPECIFIC COMPOUNDS - 100 Compounds (I) are disclosed e.g. 9,9-dimethyl-10-phenyl-2-(9-phenyl-9H-carbazol-2-yl)-9,10-dihydro-acridine (Ia), 10-biphenyl-4-yl-9,9-dimethyl-2-(9-phenyl-9H-carbazol-2-yl)-9,10-dihydro-acridine, 10-(9,9-dimethyl-9H-fluoren-2-yl)-9,9-dimethyl-2-(9-phenyl-9H-carbazol-2-yl)-9,10-dihydro-acridine, 2-(6,9-diphenyl-9H-carbazol-2-yl)-9,9-dimethyl-10-phenyl-9,10-dihydro-acridine and 10-biphenyl-4-yl-9,9-dimethyl-2-phenyl-7-(9-phenyl-9H-carbazol-2-yl)-9,10-dihydro-acridine.    EXAMPLE - Solution of 3-(4-bromophenyl)-9-phenyl-9H-carbazole (31 g) and methyl anthranilate (10.1 ml) in degassed toluene (300 ml) was added with cesium carbonate (25.4 g), palladium acetate (0.9 g) and xantphos (1.5 g) and heated for 8 hours under reflux. Then the reaction mixture was worked up to obtain 2-(4-(9-phenyl-9H-carbazol-3-yl)-phenylamino)benzoic acid methyl ester. Then a suspension of anhydrous cerium(III) chloride (15 g) in dried tetrahydrofuran (400 ml) was added with 2-(4-(9-phenyl-9H-carbazol-3-yl)-phenylamino)benzoic acid methyl ester (26 g) in portions. Then at 0 degrees C 3 M solution of methyl magnesium chloride in tetrahydrofuran (56.2 ml) was added dropwise and stirred for 20 hours at room temperature. Then the reaction mixture was worked up to obtain 9,9-dimethyl-2-(9-phenyl-9H-carbazol-3-yl) -9,10-dihydroacridine. Then a solution of 9,9-dimethyl-2-(9-phenyl-9H-carbazol-3-yl) -9,10-dihydroacridine (18.0 g) and 4-bromobiphenyl (9.3 g) in degassed toluene (250 ml) was added with cesium carbonate (26.0 g), palladium acetate (0.4 g) and xantphos (0.8 g) and heated for 8 hours under reflux. Then the reaction mixture was worked up to obtain 10-biphenyl-4-yl-9,9-dimethyl-2-(9-phenyl-9H-carbazol-3-yl) -9,10-dihydroacridine.