TECHNOLOGY FOCUS - ELECTRONICS - Preferred Device: A photoelectric transducer (10) consists of a semiconductor layer containing semiconductor particles (6), and the porphyrin type complex (5).    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Particles: The semiconductor particles contain titanium oxide or tin oxide.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (disclosed): A metal complex obtained using acetylacetonato metal complex or metal acetate complex is reacted with a nitrating agent, and a nitro group is introduced into the desired position of a metal complex. The metal complex is then reacted with a reducing agent in the presence of a palladium catalyst, and the nitro group is converted into amino group. The metal complex is reacted with Dess-Martin periodinane as oxidizing agent, and the amino group is converted into dioxo group. The metal complex is then reacted with 2,3-diamino maleonitrile, and the cyano group of the metal complex is processed with a strong acid, such as sulfuric acid, to obtain the new porphyrin compound. Preferred Compound: A porphyrin-type complex obtained using the porphyrin compound is of formula (2), preferably of formula (D, E or F).M=transition metal, preferably ruthenium, iron, copper or zinc. SPECIFIC COMPOUNDS - 5,10,15,20-Tetrakis(2,4,6-trimethylphenyl)-4',5'-dicarboxypyrazino(2,3- beta )porphyrin of formula (A), 5,10,15,20-tetrakis(2,4,6-trimethylphenyl)-6'-carboxyquinoxalino(2,3- beta )porphyrin of formula (B), and 5,10,15,20-tetrakis(2,4,6-trimethylphenyl)-6',7'-dicarboxyquinoxalino(2,3- beta )porphyrin of formula (C) are specifically claimed as the porphyrin compound.    EXAMPLE - Concentrated sulfuric acid (7 mL) was added to trifluoroacetic acid solution (30 mL) of 5,10,15,20-tetrakis(2,4,6-trimethylphenyl)-4',5'-dicarboxypyrazino(2,3- beta )porphyrinato nickel (43.6 mg). The liquid mixture was refluxed at 70 degrees C for 6 hours, heated to 80 degrees C more, and reacted for 14 hours. After cooling the reaction mixture to room temperature, the reaction mixture was neutralized with sodium hydrogen carbonate saturated water solution. The organic layer was extracted with chloroform, washed with water, and dried. Solvent was removed to obtain 5,10,15,20-tetrakis(2,4,6-trimethylphenyl)-4',5'-dicarboxypyrazino(2,3- beta )porphyrin (91 mg) as deep blue-purple color solid with a yield of 89%. 5,10,15,20-tetrakis(2,4,6-trimethylphenyl)-4',5'-dicarboxypyrazino(2,3- beta )porphyrin (17 mg) and zinc (II) acetylacetonato (76 mg) were dissolved in 1,2-dichloroethane (60 mL). The obtained solution was refluxed at 80 degrees C and reacted for 16 hours. The reaction mixture was concentrated, and the residue was filtered. The filtrate was washed with water and dried, and the solvent was removed to obtain 5,10,15,20-tetrakis(2,4,6-trimethylphenyl)-4',5'-dicarboxypyrazino(2,3- beta )porphyrinato zinc (II) (11 mg) with a yield of 61%. The complex had excellent photosensitization effect and sensitivity in near infrared region from UV region.