TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Structure: The micelle is nano micelle of core corona-type. The inner portion of the micelle contains a hydrophobic core, and the outer surface contains a hydrophilic corona layer. The hydrophilic corona layer is contained, such that porphyrin is floated. The hydrophobic core contains porphyrin. The hydrophilic corona layer has a brush and/or a loop structure. The mean particle diameter of the micelle is 20-400 nm. EXAMPLE - p-Iodomethyl benzaldehyde (0.98 g), pyrrole (0.28 g) and chloroform (400 ml) were mixed in a reactor. Bubbling was carried out for 10 minutes using argon gas and the solution was stirred. Diethyl ether (0.02 ml) solution of boron tribromide was added into the solution and stirred for 1 hour. Triethylamine (0.23 ml) and chloranil (0.74 g) were then added, and the mixture was refluxed for 1 hour. After reaction completion, the temperature of the liquid mixture was reduced to room temperature. The solvent was removed by distillation, and the product was thus concentrated. A suitable amount of methylene chloride was added to the concentrated liquid and filtered to remove insoluble solid content. The solid content was refined using a silicon column, and tetra(p-iodomethylphenyl) porphyrin (TIMPP) (0.55 g) was obtained with a yield of 47 %. TIMPP (0.0352 g) was added to phenyl acetonitrile (8 ml) and stirred at room temperature. The reaction was carried out at 100 degrees C for 24 hours after adding 2-methyl-2-oxazoline (1.02 g). The conversion ratio of 2-methyl-2-oxazoline was 98 %. The mixture was further reacted with 2-phenyl-2-oxazoline (0.883 g) and phenyl acetonitrile (4 ml) at 100 degrees C for 24 hours, after reducing the temperature to 60 degrees C. Methanol (10 ml) was added to the reaction liquid cooled to room temperature, and concentrated. Methanol (15 ml) and THF (100 ml) were added and the polymer was settled. The polymer was made to re-precipitate and put into a desiccator comprising phosphorus pentoxide. Suction drying was carried out followed by pressure reduction. Star-shaped poly(methyl oxazoline-b-phenyl oxazoline) (S-MO-b-PO) (1.88 g) having number average molecular weight of 26000, molecular weight distribution of 1.47 and ratio of methyl oxazoline residue/phenyl oxazoline residue of 68/32, was obtained.