TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): (6,6)-Phenyl-61C-sec-butyl butyrate is obtained by synthesizing 4-benzoyl-sec-butyl butyrate by using 4-benzoylbutyric acid and sec-butyl alcohol as raw materials under the action of concentrated sulfuric acid catalysis, dissolving 4-benzoyl-sec-butyl butyrate and p-toluenesulfone hydrazide in sec-butyl alcohol to obtain 5-phenyl-5-p-toluenesulfone hydrazino-sec-butyl valerate in reflux mode, reacting 5-phenyl-5-p-toluenesulfone hydrazino-sec-butyl valerate and 60C fullerene under catalysis of sodium methoxide to obtain PC61BSB(5,6), and finally dissolved in o-dichlorobenzene to obtain high-purity PC61BSB(6,6). Preferred Conditions: 4-Benzoylbutyric acid is added to a flask, followed by addition of organic solvent and sec-butyl alcohol and complete dissolution in an oil bath pan. A catalyst is added, and the reaction mixture is heat-refluxed and continuously stirred for reaction. After reaction completion, sulfuric acid is removed by washing with little excess sodium bicarbonate aqueous solution. Ethyl acetate is added and extraction is carried out. The organic layer is separated, washed with distilled water, dried using anhydrous sodium sulfate after filtering, collecting the filtrate, decompressing, and drying, to obtain a crude product. The crude product is purified using silica gel column chromatography and dried, to obtain 4-benzoyl-sec-butyl butyrate. The organic solvent is toluene and the catalyst is concentrated sulfuric acid. The heat-refluxing temperature is 90 degrees C. Vacuum-drying time is 10 hours. Silica chromatography column separation conditions include an effective column length of 15 cm, a silica gel size of 300-400 mesh, and a mobile phase comprising ethyl acetate and n-hexane is 1:6. 4-Benzoyl-sec-butyl butyrate and p-toluenesulfone hydrazide are added to a flask, following by addition of sec-butyl alcohol, heating to 110 degrees C, continuous stirring, refluxing for 12 hours, and cooling. The formed white precipitate is filtered, washed with methanol, and dried to obtain white solid of 5-phenyl-5-p-toluenesulfone hydrazino-sec-butyl valerate. 60C Fullerene is dissolved in o-dichlorobenzene to obtain a solution. 5-Phenyl-5-p-toluenesulfone hydrazino-sec-butyl valerate is added to a flask, followed by addition of dry pyridine and strong alkali sodium methoxide under nitrogen protection. The temperature is increased to 80 degrees C for 15 minutes until the solution becomes red. The reaction mixture is naturally cooled to 69 degrees C, and the fullerene solution is dripped in the red solution, stirred, and reacted for 24 hours. The reaction solution is heated to 75 degrees C, and pyridine is removed by distilling under reduced pressure. The temperature is increased to 97 degrees C to remove o-dichlorobenzene, and the product is washed and dried to obtain PC61BSB(5,6). The effective column length is 10 cm, and the mobile phase uses carbon disulfide and chlorobenzene. (PC61BSB)(5,6) is dissolved in o-dichlorobenzene and transferred to a flask and heated. O-Dichlorobenzene is distilled under reduced pressure and the product is purified using silica gel column chromatography to obtain high-purity PC61BSB(6,6). The heat-refluxing temperature is 180 degrees C, the stirring time is 48 hours, the heating temperature is 97 degrees C, the effective column length is 7 cm, and the mobile phase is chlorobenzene.