TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (disclosed): A halogenated aromatic compound of formula (3) is reacted with triethyl phosphorus acid, to obtain diethyl aromatic phosphonate of formula (4). Compound (4) is reacted with a halogenated benzaldehyde derivative of formula (5) in a solvent in the presence of catalyst, to obtain a halogenated phenylvinyl aromatic compound of formula (6). A halogenated propenyl aromatic compound of formula (3') is reacted with triethyl phosphorus acid, to obtain diethyl aromatic propenyl phosphonate of formula (4'). Compound (4') is reacted with a halogenated benzaldehyde derivative of formula (5') in a solvent in the presence of catalyst, to obtain a halogenated butadienyl aromatic compound of formula (6'). Compound (6) is reacted with an aromatic diamine (H2N-Ar1-NH2), to obtain a bis styryl aromatic diamine of formula (8). Compound (8) is coupled with compound (6'), to obtain the new aromatic diamine.X1-X4=halogen;andAr1-Ar3,R1-R12,m,n=as mentioned above. SPECIFIC COMPOUNDS - Bis((4-((1E,3E)-4-phenyl-buta-1,3-dienyl)-phenyl)-(4-((E)-styryl)-phenyl)-amine) benzene of formula (A), bis((4-((E)-2-naphthalen-1-yl-vinyl)-phenyl)-(4-((1E,3E)-4-phenyl-buta-1,3-dienyl)-phenyl)-amine) benzene, bis((4-((1E,3E)-4-phenyl-buta-1,3-dienyl)-phenyl)-(4-((E)-styryl)-phenyl)-amine) mesitylene, and bis((4-((1E,3E)-4-phenyl-buta-1,3-dienyl)-phenyl)-(4-((E)-styryl)-phenyl)-amine) benzene are disclosed as specific diamine derivatives.    EXAMPLE - Diethyl (E)-2-phenylvinyl phosphonate (in g) (18) was taken in a flask and argon gas replacement was carried out. Tetrahydrofuran (100 mL) and 28% sodium methoxide (11) were added and stirred for 30 minutes at 0degreesC. The reaction liquid was dissolved in dry tetrahydrofuran (300 mL), and 4-bromobenzaldehyde (10) was added and stirred at room temperature for 12 hours. The reaction liquid was poured into ion-exchange water and extracted with toluene. The organic layer was washed with ion-exchange water 5 times, and dried. The residue was re-crystallized using toluene (20 mL)/methanol (100 mL) mixed solvent, to obtain 1-bromo-4-((1E,3E)-4-phenylbuta-1,3-dienyl) benzene (11.7). 1-bromo-4-((1E,3E)-4-phenylbuta-1,3-dienyl) benzene (10), dicyclohexyl (2-biphenyl) phosphine (0.07), tris(dibenzylidene acetone) dipalladium (0) (0.09), t-sodium butoxide (5.6), 3-aminophenylamine (2.2), and o-xylene (500 mL) were stirred for 5 hours at 120degreesC, and cooled to room temperature. The organic layer was washed with ion-exchange water thrice, and dried. Xylene was distilled off, and the residue was purified using chloroform/hexane solvent, to obtain N,N'-bis-(4-((E)-styryl)-phenyl)-benzene-1,3-diamine (7.9). 1-bromo-4-((1E,3E)-4-phenylbuta-1,3-dienyl) benzene (1.4), dicyclohexyl (2-biphenyl) phosphine (0.013), tris(dibenzylidene acetone) dipalladium (0) (0.017), t-sodium butoxide (1.1), N,N'-bis-(4-((E)-styryl)-phenyl)-benzene-1,3-diamine (7), and o-xylene (500 mL) were stirred at 120degreesC for 3 hours, and cooled to room temperature. The organic layer was washed with ion-exchange water thrice, and dried. Xylene was distilled off, and the residue was purified using chloroform/hexane solvent to obtain bis((4-((1E,3E)-4-phenyl-buta-1,3-dienyl)-phenyl)-(4-((E)-styryl)-phenyl)-amine) benzene (9.9) of formula (A) with a yield of 75%.