TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The catalyst is tris(dibenzylideneacetone)dipalladium(0), tetrakis(triphenylphosphine)palladium(0) or bis(triphenylphosphine)palladium(II) dichloride and added in an amount of 0.5-20 mole%.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The organic solvent comprises tetrahydrofuran, dimethyl ether, diethyl ether, benzene or toluene and added in a sufficient amount. Preferred Process: The isolating and purifying step comprises performing Stille coupling reaction of the reaction liquid obtained by adding deionized water and toluene for extraction, evaporating the organic phase under reduced pressure and the concentrating the extract, concentrating the organic phase, and then adding ethanol dropwise to the mixture with continuous stirring, precipitating and filtering, drying the obtained powder, dissolving the solid powder in chloroform and then subjecting to column chromatography over neutral alumina, removing the organic solvent under reduced pressure, extracting the resulting solid in Soxhlet extractor with acetone, sedimentation of methanol, and vacuum filtering obtain (I). (IA) is prepared by dissolving 4-bromo-7-(7-bromo-5-iodo-2,1,3-benzothiadiazol-4-yl)-6-iodo-2,1,3-benzothiadiazole (IC) in a first solvent under an inert gas atmosphere to obtain a first mixture, adding n-butyl lithium dropwise to the mixture, heating the mixture at 90 degrees C with stirring, after 2 hours, adding a dichlorosilane compound of formula ((Cl)2-Si(R1)-R2) (aa), reacting at room temperature for 10 hours, and then purifying, where the molar ratio of n-butyl lithium and (IC) is x that is 2-4, and molar ratio of (IC) and (aa) is 1: 2. (IC) is prepared by dissolving a mixture of 2-amino-5-nitroaniline was in thionyl chloride in the presence of pyridine at 80-90 degrees C under reflux for 24 hours, after separation and purification to give 5-nitro-2,1,3 benzothiazoloxadiazole that is mixed with hydrobromic acid to obtain a mixture, heating the mixture at 127 degrees C, adding bromine dropwise to the mixture and refluxing for 4 hours to obtain 4,7-dibromo-5-nitro-2,1,3 benzothiadiazole, adding copper and N,N-dimethyl formamide and heating to 120 degrees C for 3 hours, separating and purifying to obtain 4,4'-dibromo-6,6 -dinitro-2,1,3 benzothiadiazole followed by adding tetrahydrofuran and tin chloride, heating the mixture at 100?C for 10 hours, and isolating (IC). (IB) is prepared by dissolving a 2-bromothiophene compound of formula (IE) in a second solvent under inert gas atmosphere to obtain a second mixture of solution, reacting at -78 degrees C for 2 hours and than adding n-butyl lithium, adding tributyltin chloride to the mixture at -78 degrees C for 1 hour and then at room temperature for 6 hours, and isolating pure (IB), where the molar ratio of (IE) and n-butyl lithium is 1:2.