TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The catalyst is organic palladium or mixture of the organic palladium and organic phosphorus ligand; the organic palladium is tris(dibenzylideneacetone)dipalladium(0), tetrakis(triphenylphosphine)palladium or bis(triphenyl-phosphine)palladium(II) chloride; the organic phosphorus ligand is tri(o-tolyl)phosphine; the alkali solution is sodium hydroxide aqueous solution, sodium carbonate aqueous solution, sodium bicarbonate aqueous solution and/or tetraethyl ammonium hydroxide aqueous solution; and the first organic solvent is methylbenzene, tetrahydrofuran, trichloromethane or ethyl acetate.    TECHNOLOGY FOCUS - POLYMERS - Preparation (claimed): The preparation of (I) comprises carrying out Suzuki reaction fluorene monomer (II), thiophene monomer of formula Br-Ar'-Br (III) and thiophene pyrroledione monomer (IV) in oxygen-free environment, under presence of catalyst, alkali solution and first organic solvent, at 65-120 degrees C for 24-72 hours, and obtaining (I), with molar ratio of (II), (III) and (IV) at 1:c:d.c, d=more than 0;orc+d=0.9-1.1.Preferred Processes: The preparation of fluorene monomer (II) comprises in oxygen-free environment, adding 2,7-dibromo-9,9-fluorene dialkyl and butyl lithium at - 100 to - 25 degrees C in molar ratio of 1:2-1:4 into second organic solvent; and adding 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-bioxapentaborane, recovering to room temperature to continuously react for 24-48 hours, and obtaining 2,7-bi(4,4,5,5-tetramethyl-1,3,2-bioxa pentaborane)-9,9-fluorene dialkyl, with second organic solvent comprising tetrahydrofuran, diethyl ether, dichloromethane, trichloromethane or ethyl acetate. The preparation of (III) comprises in oxygen-free environment, adding thiophene raw material and N-bromosuccinimide into third organic solvent in molar ratio of 1:2-1;2.5 at 0-30 degrees C for 12-48 hours, and obtaining dibromo product, with third organic solvent comprising N,N-dimethylformamide, tetrahydrofuran, diethyl ether, dichloromethane, trichloromethane, ethyl acetate or acetic acid. The preparation of (IV) comprises adding 5-alkylthrophene (3,4-c)-pyrrole-4,6-diketone and N-bromosuccinimide at 10-30 degrees C in molar ratio of 1:2-1:4 into fourth organic solvent to react for 12-48 hours, with organic solvent comprising mixed solvent of sulfuric acid and trifluoroacetic acid.