TECHNOLOGY FOCUS - POLYMERS - Preparation (Claimed): The preparation of (A), comprises (i) carrying out C-N coupling reaction of p-aminophenol with bromobenzene under nitrogen atmosphere to obtain hydroxy group-containing triphenylamine compound (III), (ii) either reacting (III) with 4-(p-toluenesulfonyloxy)methyl-1,6-hept-diyne to obtain mono(triphenylamine)-substituted 1,6-hept-diyne monomer (IV), or reacting (III) with 4,4-bis((p-toluenesulfonyloxy)methyl)-1,6-hept-diyne to obtain di-(triphenylamine)-substituted 1,6-hept-diyne monomer (V), (iii) adding Grubbs catalyst into (IV) or (V), stirring, and carrying out polymerization reaction, then (iv) terminating the reaction, and (v) adding the reaction solution into methanol, precipitating, washing, and drying to obtain (I) or (II). Preferred Method: The step (i) is carried out in presence of palladium catalyst and phosphorus ligand. The method further comprises dissolving (IV) or (V) in an organic solvent, freezing with liquid nitrogen, evacuating with nitrogen gas, and repeating the steps multiple times, and dissolving Grubbs catalyst also in organic solvent, freezing with liquid nitrogen, evacuating with nitrogen gas, and repeating the steps multiple times, where the organic solvent is dichloromethane, chloroform or tetrahydrofuran, and the organic solvent is used in an amount to make concentration of (IV) to be 0.1-2 mol/l or concentration of (V) to be 0.05-1 mol/l. In step (iii): the polymerization reaction is carried out at -30 to 50 degrees C for 0.05-2 hours when (IV) is used as reactant; and the polymerization reaction is carried out at -10 to 50 degrees C for 0.5-8 hours when (V) is used as reactant. Preferred Components: The Grubbs catalyst is dichloro(1,3-bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene)(benzylidene)bis(3-bromopyridine)ruthenium(II) or (1,3-bis-(2,4,6-trimethylphenyl)-2-imidazolidinylidene)dichloro(phenylmethylene)(tricyclohexylphosphine)ruthenium. In step (i), molar ratio between p-aminophenol and bromobenzene is 1:2.2-1:2.4. In step (ii), molar ratio between (III) and 4-(p-toluenesulfonyloxy)methyl-1,6-hept-diyne is 1:2.2-1:2.4, and molar ratio between (III) and 4,4-bis((p-toluenesulfonyloxy)methyl)-1,6-hept-diyne is 1:4.4-1:4.8. In step (iii), the used amount of Grubbs catalyst is 0.04-0.005 times the molar amount of (IV) or 0.04-0.01 times the molar amount of (V).