TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The silica porous material has a skeleton structure of (X-Si-O).X = organic group that is chemically bound to the silicon atoms.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The electron acceptor is 1-methyl-4-(1-methylpyridin-1-ium-4-yl)pyridin-1-ium, rhenium pyridinium complex compound of formula (aa), cobalt complex compound of formula (bb), porphyrin, chromium (Cr) (2,2'-bipyridine)32+, Cr (2,2'-bipyridine)33+, chromium complex (Cr(CN)63-), iron complex (Fe(CN)64-), Fe3+, N,N-dimethylaniline, platinum complex (Pt2 (P2O5)4H84-), methyl para-cyanobenzoate, para-dicyanobenzene, para-dinitrobenzene, para-benzoquinone, rhenium complex (ReCl82-), Rh2(1,3-diisocyanopropane)42+, Ru(2,2'-bipyridine)32+, trans-stilbene, UO22+, Zn porphyrin complex, Zn(tetraphenylporphyrin), Zn(octaethylporphyrin), Zn phthalocyanine, acetophenone, anthracene, osmium(II) complex, chloranil, cyanoanthracene, cyanonaphthalene, dimethylaniline, dicyanoanthracene, dicyanonaphthalene, dimethylbicyclohepta-2,5-diene-2,3-dicarboxylate, tetracyanoanthracene, tetracyanoethylene, triphenylpyrylium tetrafluoroborate, naphthalene, nitrobenzene, viologen, phenanthrene, fullerene (C60), fullerene (C60)- mu -oxodimer(C1200), fullerene (C70), benzophenone, methylviologen, methoxyacetophenone, oxygen or aromatic vinyl polymer. The porous material has a periodic structure with an interval of 5 nm or less based on the regular arrangement of the organic groups. The porous material has the pore with a central pore diameter of 1-30 nm. The porous material has peaks at a diffraction angle corresponding to a d value of 1 nm or more in an X-ray diffraction pattern. The electron acceptor is at least one kind comprising a quinone compound, aromatic compound having a vinyl group, aromatic compound having a cyano group, aromatic compound having a nitro group, nitrogen-containing aromatic compound, organic compound having a dicyanomethylene group, molecular metal complex containing an organic compound having a dicyanomethylene group as a ligand, organic compound having a cyanoimino group, molecular metal complex containing an organic compound having a cyanoimino group as a ligand, fullerene, carbon nanotube, metal complex having a nitrogen-containing organic ligand, metal complex having a cyclic ligand, metal complex salt, metal ion or metal oxide.L, L1 = not defined.