TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): 2-(4'-Bromophenyl)ethanol is subjected to hydroxyl substitution to obtain a bromine derivative, which is then reacted with an alkylthiol to obtain a thioether. The obtained thioether and trimethylethynylsilane are subjected to a palladium-catalyzed coupling reaction to obtain a diphenylacetylene derivative. A hexaphenylbenzene derivative is then obtained through cyclotrimerization catalyzed by carbonyl cobalt. An intermediate is formed by catalysis of anhydrous ferric chloride, and a final product is obtained in the presence of iodine and sodium borohydride. Preferred Process: p-Bromophenyl ethyl alkyl thioether is obtained by subjecting an alkyl thioether and 4-bromophenethyl bromide to a heating reaction in a mixture of potassium hydroxide aqueous solution and tetrahydrofuran, under nitrogen protection, and in the presence of tetrabutylammonium iodide as phase-transfer catalyst. 1,2-Bis(4'-alkylthioethylphenyl)acetylene is obtained by reacting p-bromophenyl ethyl alkyl thioether, 1,8-diazabicycloundec-7-ene, and ethynyltrimethylsilane in a mixture of benzene and water, under nitrogen protection, and in the presence of palladium(II) compound and cuprous iodide. Hexakis(4'-alkylthioethylphenyl)benzene is obtained by adding dicobalt octacarbonyl as a catalyst to 1,2-bis(4'-alkylthioethylphenyl)acetylene in the presence of dioxane and under nitrogen protection. Hexakis(4'-alkylthioethylphenyl)benzene dissolved in anhydrous dichloromethane is reacted with a nitromethane solution of anhydrous ferric trichloride under nitrogen protection, and hexabenzocoronene compound is obtained in the presence of iodine and sodium borohydride. p-Bromophenyl ethyl alkyl thioether is obtained by adding potassium hydroxide aqueous solution in a reaction bottle, carrying out ventilation three times, dripping alkyl thioether under nitrogen protection, adding tetrabutylammonium iodide, adding tetrahydrofuran 10 minutes later, evenly stirring, adding 4-bromophenethyl bromide, increasing the temperature to 45 degrees C, reacting overnight while vigorously stirring, adding the reaction solution into dilute hydrochloric acid, extracting with dichloromethane, drying by anhydrous sodium sulfate, decompressing to evaporate the solvent, and carrying out column chromatography. 1,2-Bis(4'-alkylthioethylphenyl)acetylene is obtained by adding p-bromophenyl ethyl alkyl thioether into a three-necked bottle with dry benzene, carrying out ventilation three times, adding palladium(II) compound and cuprous iodide under nitrogen protection, adding 1,8-diazabicycloundec-7-ene by a needle tube, carrying out ventilation three times, adding ethynyltrimethylsilane and water by a needle tube, sealing the bottle, reacting overnight at normal temperature, decompressing to evaporate solvent, and recrystallizing with ethanol. Hexakis(4'-alkylthioethylphenyl)benzene is obtained by dissolving 1,2-bis(4'-alkylthioethylphenyl)acetylene in dry dioxane, carrying out ventilation three times, adding dicobalt octacarbonyl, refluxing for 18 hours under nitrogen protection, decompressing to evaporate solvent, and subjecting the crude product to column chromatography. Hexabenzocoronene compound is obtained by cyclodehydrogenation of hexakis(4'-alkylthioethylphenyl)benzene by dissolving hexakis(4'-alkylthioethylphenyl)benzene in a three-necked bottle with dry dichloromethane, adding nitrogen below the liquid level through a needle tube, carrying out ventilation for 20 minutes so that gases in the solvent are completely displaced, dissolving ferric trichloride into nitromethane, dripping into the solution, quenching with cold methanol 30 minutes later, dissolving the product in tetrahydrofuran, adding iodine and sodium borohydride, and post-treatment. Preferred Compounds: The alkylthiol is 1-18C alkylthiol. The alkylthiol is decyl mercaptan, dodecyl mercaptan, tetradecyl mercaptan, or hexadecyl mercaptan. The palladium(II) compound is dichlorobis(triphenylphosphine)palladium. Preferred Definitions:    R=decyl, dodecyl, myristyl or hexadecyl.