TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (disclosed): Preparation of the diaminoanthracene derivative (I) involves Friedel Crafts alkylation of anthracene with an alcohol e.g. tert-butanol in solvent such as trifluoroacetic acid to give anthracene (substituted on 2 and 6 position with R3 and R5 respectively) followed by bromination using Br2 in carbon tetrachloride to give corresponding 9,10-dibromo-anthracene and then reaction with an amine in presence of Pd catalyst. Preferred Definitions:    Ar1 and Ar2=phenyl, biphenyl, naphthyl or binaphthyl (having electron- withdrawing group selected from fluoro, cyano, perfluoroalkyl, nitro or -SO2R);    R=alkyl or perfluoroalkyl;    R1 and R2=phenyl, biphenyl, naphthyl or binaphthyl (all optionally substituted with electron-withdrawing group, alkyl and alkoxy);    R3 and R4=H, branched alkyl or cycloalkyl;    R5=H;and    R6=branched alkyl or cycloalkyl.    SPECIFIC COMPOUNDS - 9 Compounds are specifically claimed as the diaminoanthracene derivative (I), e.g. 2,6-di-tert-butyl-N,N,N',N'-tetrakis-(2,6-difluoro-phenyl)-anthracene-9,10-diamine (I'); N,N,N',N'-tetrakis-(2,6-difluoro-phenyl)-anthracene-9,10-diamine; N,N'-bis-(2,6-difluoro-phenyl)-2,6-dimethyl-N,N'-bis-(2,3,4,5,6-pentamethyl-phenyl)-anthracene-9,10-diamine; N,N'-bis-(2,6-dimethyl-phenyl)-2,6-dimethyl-N,N'-bis-(2,4,6-trifluoro-phenyl)-anthracene-9,10-diamine; and 2,6-di-tert-butyl-N,N'-bis-(4-fluoro-phenyl)-N,N'-bis-(2,4,6-trifluoro-phenyl)-anthracene-9,10-diamine.    EXAMPLE - 2,6-Difluoro-bromobenzene (3.86 g) in a nitrogen filled glove box was added to 2,6-difluoroaniline (2.6 g) and all stirred into 50 ml dry toluene. Tris-dibenzylideneacetonedipalladium (0) (Pd2DBA3) (0.21 g), P(tert-Bu)3 (0.09 g) and tert-BuONa (2 g) were added. The dark yellow brown mixture was then heated in the glove box at 80 degrees C for 4 hours. The reaction mixture was then cooled and removed from the glove box to work up by silica chromatography using methylene chloride eluent to generate 2,2',6',6'-tetrafluorodiphenylamine (Ia). In a nitrogen filled glove box, 2,6-di-tert-butyl-9,10-dibromo-anthracene (1 g) and secondary amine (1.06 g) from the amine (Ia) were mixed in dry toluene(25 ml). Pd2(DBA)3 (0.2g), P(tert-Bu)3 (0.08g) and tert-BuONa (0.5 g) were all added to the stirred toluene reaction mixture. The mixture was then heated in the glove box at 80 degrees C for 1 hour. After 90 minutes, the reaction mixture was cooled and worked up to give 2,6-di-tert-butyl-N,N,N',N'-tetrakis-(2,6-difluoro-phenyl)-anthracene-9,10-diamine.