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). 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 a halogenated compound of formula: Ra-X3, to obtain the new aromatic diamine.X1-X4=halogen;andAr1-Ar3,R1-R12,m,n=as mentioned above. SPECIFIC COMPOUNDS - Bis(N-butyl-N-(4-((1E,3E)-4-phenylbuta-1,3-dienyl) phenyl) amine) benzene of formula (A), bis(N-(2-methylprop-1-enyl)-N-(4-((1E,3E)-4-phenylbuta-1,3-dienyl) phenyl) amine) benzene, bis(N-butyl-N-(4-((1E,3E)-4-phenylbuta-1,3-dienyl) phenyl) amine) ethane, and bis(N-(t-butyl)-N-(4-((1E,3E)-4-phenylbuta-1,3-dienyl) phenyl) amine) benzene are disclosed as specific diamine derivatives.    EXAMPLE - Diethyl (2E)-3-phenylprop-2-enylphosphonate (in g) (15) 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 (9) 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 (12). 1-bromo-4-((1E,3E)-4-phenylbuta-1,3-dienyl) benzene (10), dicyclohexyl (2-biphenyl) phosphine (0.062), tris(dibenzylidene acetone) dipalladium (0) (0.08), t-sodium butoxide (5), 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-((1E,3E)-4-phenyl-buta-1,3-dienyl)-phenyl)-benzene-1,3-diamine (8.8). 1-bromobutane (0.9), dicyclohexyl (2-biphenyl) phosphine (0.012), tris(dibenzylidene acetone) dipalladium (0) (0.016), t-sodium butoxide (1), N,N'-bis-(4-((1E,3E)-4-phenyl-buta-1,3-dienyl)-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(N-butyl-N-(4-((1E,3E)-4-phenylbuta-1,3-dienyl) phenyl) amine) benzene (6.4) of formula (A) with a yield of 75%.