TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): The receptor material (I) is prepared by dissolving optionally substituted benzoyl alkylene acid alkyl ester into organic solvent, and adding toluene sulfohydrazide at mole ratio of 1-1.2; heating, back flowing, cooling to room temperature, evaporating, removing organic solvent, passing through a silica gel column, and taking mixed solvent of organic solvent and petrol ether as spraying agent at volume ratio of 1:100-1; dissolving into anhydrous pyridine solvent, adding sodium methylate at mole ratio of 1-1.5, stirring, adding 60C of anhydrous o-dichlorobenzene solution at ratio of 0.5, reacting at 60-150 degrees C for 24-48 hours, evaporating to remove pyridine and o-dichlorobenzene solvent, and performing column layering to obtain (5,6)-benzene-carbon 61-alkylene acid alkyl ester; and adding into anhydrous o-dichlorobenzene solvent, heating, back flowing for 2-24 hours, and evaporating. Preferred Components: The alkyl is methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tertbutyl, 2-methylbutyl, 3-methylbutyl, 1-ethylbutyl, 2-ethylbutyl, 1-propylbutyl, amyl, isoamyl, 2-methyl amyl, 3-methyl amyl, 4-methyl amyl, 1-ethyl amyl, 2-ethyl amyl, 2-ethyl amyl, hexyl, isohexyl, 2-methyl hexyl, 3-methyl hexyl, 4-methyl hexyl, 5-methyl hexyl, 2-ethyl hexyl, heptyl, isoheptyl, nonyl, decyl, undecyl, dodecyl, tridecyl, myristyl, pentadecyl, hexadecyl, heptadecyl, octadecyl or nonacodecyl. The alkoxy is methoxy, ethoxyl, propoxy, isopropoxy, butoxy, isobutoxy, tertbutoxy, 2-methylbutoxy, 3-methylbutoxy, 1-ethylbutoxy, 2-ethylbutoxy, 1-propylbutoxy, pentyloxy, isopentyloxy, 2-methylpentyloxy, 3-methylpentyloxy, 4-methylpentyloxy, 1-ethylpentyloxy, 2-ethylpentyloxy, 3-ethylpentyloxy, acetoxy, iso acetoxy, 2-methylacetoxy, 3-methylacetoxy, 4-methylacetoxy, 5-methylacetoxy, 2-ethylacetoxy, heptoxy, isoheptoxy, octoxy, isoctoxy, nonyl, decyl, undecyl alkoxy, dodecyloxy, tridecyl alkoxy, tetradecyl alkoxy, pentadecane alkoxy, cetane alkoxy, heptadecane alkoxy, octadecane alkoxy, nonadecane alkoxy or eicosane alkoxy. The alkylene is butylidene, pentylidene, hexylidene, heptamethylene, octylene, nonylene or decamethylene. The organic solvent is methanol, ethanol, propanol, butanol, pentanol, octanol, isooctanol, tetrahydrofuran, trichloromethane, acetone, acetonitrile, N,N'-dimethyl formamide, methylene dichloride, carbon tetrachloride, ethyl ester, benzene, chlorobenzene or o-dichlorobenzene.