TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): (I) is prepared by:(A) dissolving dipyrromethane (A), first silicon fluorene derivative of formula (B), and second silicon fluorene derivative of formula (C) into first organic solvent containing oxidant and first catalyst at mole ratio of i:j:k, reacting for 1-24 hours at 20-100 degrees C, and obtaining silicon fluorene porphyrin derivative of formula (D), where i:j:k is 1:1-100:1-100, i=j+k, and i is not less than j and more than 0;(B) dissolving derivative (D) and bromating agent to second organic solvent according at mol. ratio of 1:2-1:5 to react for 1-72 hours at 0-120 degrees C, and obtaining dibromide silicon-fluorene derivative of formula (E);(C) dissolving derivative (E) into third organic solvent and adding solution containing M metal ion, stirring for 0.2-24 hours at 0-30 degrees C, and obtaining dibromide silicon-fluorene metal derivative of formula (F), where mol. ratio of derivative (E) to M metal ion is 1:1-1:5; and(D) in anaerobic environment, dissolving derivative (F) and 5,7-bis(4,4,5,5-tetramethyl-dioxaborolanyl)thieno(3,4-b) pyrazine of formula (G) into fourth organic solvent containing second catalyst at mol ratio of 1:2-2:1, performing coupling reaction for 12-72 hours at 50-120?C, and obtaining desired material (I).Preferred Method: First catalyst is propionic acid and/or trifluoroacetic acid. Oxidant is 2,3-dchloro-5,6-dicyano-1,4-benzoquinone. First organic solvent is trichloromethane and/or dichloromethane. Bromating agent is N-bromosuccinimide. Second organic solvent is tetrahydrofuran, chloroform, dimethylformamide and/or orthodichlorobenzene. Third organic solvent is trichloromethane, tetrahydrofuran, benzene, methylbenzene and/or methylene dichloride. Solvent is methyl alcohol, alcohol and/or water. Second catalyst is organic palladium or mixture of organic palladium and organic phosphorus ligand. Molar dosage of second catalyst is 0.01-20% of compound (G). Organic palladium is tetrakis(triphenylphosphine)palladium, tris(dibenzylideneacetone)dipalladium, or bis(triphenylphosphine)palladium(II) dichloride. Organic phosphor ligand is tri(o-tolyl)phosphine or tricyclohexyl phosphine. Fourth organic solvent is tetrahydrofuran, dichloromethane, chloroform, dioxane, dimethylformamide, glycol dimethyl ether, dimethyl sulfoxide, phenol, chlorobenzene and/or methylbenzene. The compound (G) is prepared by dissolving 5,7-dibromothieno(3,4-b)pyrazine (Y') into fifth solvent, utilizing liquid nitrogen/isopropanol to cool to - 78 degrees C, dripping n-butyllithium and reacting for 1-5 hours at - 78 degrees C, adding 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (X'), reacting for 0.5-5 hours at - 78 degrees C, naturally heating up, reacting for 1-48 hours, and obtaining compound (G). Fifth solvent is tetrahydrofuran, diethyl ether and/or dioxane. Molar weight of compound (X') is 2-4 times much as that compound (Y'). Preferred Definitions:    M=Zn2+, Cu2+, Fe2+, Co2+, Cd2+, Pt2+, Zr2+, Mn2+, Ni2+, Pb2+, and Sn2+.