NOVELTY - A meso-tetra-aryl diphenanthrene diselenide porphyrin compound is new.    USE - The meso-tetra-aryl diphenanthrene diselenide porphyrin is used for photosensitizer of photodynamic therapy, organic field effect transistors (OFET), molecular antenna, light energy converters, photoelectric transfer materials, molecular switches, molecular logical gates, molecular leading wires, organic solar cells, organic electrofluorescence, nonlinear optical materials, optical memory, optical molecular recognitions, and pharmaceutical sciences.    ADVANTAGE - The meso-tetra-aryl diphenanthrene diselenide porphyrin has UV visible absorption spectrum of red shift. Soret spectral band of meso-tetra-aryl diphenanthrene diselenide porphyrin appears at 521 nm which has a red shift of 52 nm compared with tetraphenyl-diselenide porphyrin conjugated with beta aryl-free ring, entering green ray area of being greater than or equal to 500 nm.    DETAILED DESCRIPTION - A new meso-tetra-aryl diphenanthrene diselenide porphyrin compound whose constitutional structure is of Formula I:    R=H, Cl, OCH3, or OC16H33.    An INDEPENDENT CLAIM is a process for the preparation of meso-tetra-aryl diphenanthrene diselenide porphyrin compound involving: (1) adding 1.2:1-0.8:1 mole ratio of 2,5-di(aryl hydroxide radical methyl) selenide phenazine, phenanthrene pyrrole and anhydrous methylene chloride in a reaction vessel, putting the reaction bulb in a low-temperature device and keeping in photophobic environment under oxygen-free condition, controlling the reaction condition under negative 40 degrees C, adding catalyst of boron trifluoride/diethyl ether (BF3/Et2O) and reacting for 2 hours, and naturally heating up to room temperature and continuously reacting for 48 hours; and (2) adding oxidant of the same mole number with the phenanthrene pyrrole in the reaction solution of (1), reacting for 1 hour, and decompressing to evaporate the solvent to get the meso-tetra-aryl diphenanthrene diselenide porphyrin.