TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Pigment: The methine-group pigment is of formula (II) or (III).m2 and m3 = same as m, preferably m3 is 0-3;n2 and n3 = same as n, preferably n3 is 1-4, more preferably 1-2;X2 and X3 = same as X, preferably X3 is carboxyl group;A3 and A5 = same as A1, preferably A5 is H;A4 and A6 = same as A2, preferably A6 is cyano, carboxyl or acyl group, more preferably A6 is cyano group, and X3 and A6 may couple to form optionally substituted ring;Y2 and Y3 = same as Y, preferably Y3 is sulfur atom;ring a2 and a3 = same as ring a;ring b2 and b3 = same as ring b;ring c1 and c2 = benzene ring optionally substituted by aromatic residue, which is optionally substituted by aliphatic hydrocarbon residue or substituent having halogen atom, amide, hydroxyl, alkoxyl or optionally substituted amino group; andR6, R7, R11, R12 = optionally substituted aromatic residue or optionally substituted amino group, and R6 and R7 optionally form ring which is optionally coupled with ring c1.The methine-group pigment comprises 1 or more types of metal complex. The pigment may contain an organic dye having structure other than formula (I).    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Compound: The oxide semiconductor microparticle contains titanium dioxide, and zinc or tin as essential components. The oxide semiconductor microparticle supports pigment in the presence of an inclusion compound. Preferred Definitions:    R1, R2 = optionally substituted aromatic residue, preferably benzene ring;    Y = sulfur atom;    X = carboxyl group or rhodanine ring;    A1 = H or rhodanine ring;    A2 = cyano group or rhodanine ring;    m = 1-2; and    n = 1.    SPECIFIC COMPOUNDS - 538 methine-group pigments, such as pigment of formulae (59, 98, 441, 530) are disclosed.    EXAMPLE - Compound of formula (532) (in weight parts) (1) and methyl cyanoacetate (0.45) were dissolved in ethanol (10), reacted for 2 hours, cooled, filtered, washed and dried. The product was refluxed using potassium hydroxide (20) in the presence of ethanol (1) for 2 hours. Water (50) was added to the reaction solution, and neutralized using hydrochloric acid. The orange crystal precipitate was filtered and water washed, to obtain brown compound of formula (197) as pigment. The product (0.17) was recrystallized from ethanol.    The obtained pigment was dissolved in ethanol. A semiconductor thin film electrode, obtained by sintering porous titanium oxide provided on transparent electroconductive glass electrode at 450 degrees C for 30 minutes, was immersed in the solution for 3 hours. The pigment was supported. The product was washed using solvent and dried, to obtain optoelectric transducer. The obtained product had conversion efficiency of 4.3%, release voltage of 0.67 V, and favorable electroconductivity.