TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The inorganic salt is a metal salt, preferably a zinc salt, manganese salt, and copper; preferably, The zinc salt is selected from zinc chloride, zinc acetate, zinc nitrate and zinc sulfate; the salt is selected from manganese chloride, manganese acetate, manganese nitrate, manganese sulfate and manganese sulfate; the copper salt is selected from copper chloride, copper acetate, copper nitrate and copper sulfate. Preferred Parameter: In step (1), the constant reaction time is 18-30 hours, preferably 23-25 hours.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): Preparing porphyrin-phthalocyanine pentaplet compound involves: (1) dissolving tetrakis((3,4-dicyano) phenoxy) phenyl morpholine, phthalonitrile, and inorganic salts in o-dichlorobenzene and a mixed system of dimethylethanolamine with stirring, heating to 120-190 degrees C; (2) obtaining reaction product after cooling to room temperature, using methanol and deionized water for filtration to obtain a cake; (3) performing chromatography; and (4) removing collected solvent by rotary evaporation and drying derived products. The method involves main synthetic route given in the specification. The process further involves: (a) dissolving tetrakis(hydroxy)phenyl porphyrin, 4-nitro-phthalonitrile, and potassium carbonate in dimethyl sulfoxide, heating with stirring at 60-100 degrees C; (b) cooling reaction product; (c) subjecting to column chromatography to remove unreacted starting material; (d) eluting in a volume ratio of dimethylformamide: toluene of 1-10:1; and (e) removing the solvent by rotary evaporation, and drying derived products. Preferred Composition: The weight ratio of tetrakis ((3,4-dicyano) phenoxy) phenyl porphyrin, phthalic nitriles and inorganic salt is 1:2-20:1-10, preferably 1:8-12:2-5, and most preferably 1:10:3. The ortho-dichlorobenzene and dimethylethanolamine have total amount of 5-20 ml, and most preferably 10 ml, and preferably, o-dichlorobenzene and dimethyl ethanolamine have volume ratio of 1:0.5-2, most preferably 1:1. In step (2), the methanol and deionized water have total volume of 150-500ml, preferably 200-400ml; in step (3), the amount of first developing agent is 200-800ml, preferably 300-500ml, and the amount of second agent is 200-800ml, preferably 300-500ml. In step (3), the volume ratio of the mixed solvent of dimethylformamide and toluene is 1:1-5, and most preferably 1:3.