TECHNOLOGY FOCUS - POLYMERS - Preparation (Claimed): The preparation of the complex comprises polymerizing the precursors for the production of electrically conductive polymers in the presence of sulfonated polyketones. Preferred Components: The functionalized polyketone repeating unit is of formula (-R1-Ar1-C(=O)-Ar2)n-) (I), (-(R2-Ar1(X1)a-C(=O)-Ar2(X2)b)n-) (II), (IIa), (III), (IV) and (V). The conductive polymer optionally substituted polythiophene comprises polythiophene recurring units of formulae (VII), (VII-a) and (VII-b). The polythiophene is poly(3,4-ethylenedioxythiophene).Ar1, Ar2 = optionally substituted aromatic compound;R1, R2 = optionally substituted 1-80C organic residue with -CO-;X1, X2 = sulfonic acid, sulfonate, phosphonic acid, phosphonate carboxylic acid or carboxylate, where this acids do not occur in each repeating unit, but only in the corresponding fraction of the repeating units;a, b, c, d = 0-2;n = 5-5000;M = metal cation or H; eitherR4, R5 = H, optionally substituted 1-18C alkyl or optionally substituted 1-18C alkoxy; orR4R5 = optionally substituted 1-8C alkylene, where one C is replaced by O or S, preferably 1-8C dioxy-alkylene, optionally substituted 1-8C oxythia-alkylene, optionally substituted 1-8C dithia-alkylene, or optionally substituted 1-8C alkylidene, where optionally one C is replaced by O and S;A = optionally substituted 1-5C alkylene, preferably optionally substituted 2-3C alkylene;Y1 = O or S;R6 = optionally branched, optionally substituted 1-18C alkyl, preferably optionally branched, optionally substituted 1-14C alkyl, optionally substituted 5-12C-cycloalkyl, optionally substituted 6-14C aryl, optionally substituted 7-18C aralkyl, optionally substituted 7-18C alkaryl, optionally substituted 1-4C hydroxyalkyl or OH; andy = 0-8, preferably o or 1.Preferred Method: The complex is dispersed or dissolved in at least one dispersing agent and the dispersion exhibits a pH of 1-8. EXAMPLE - Victrex PEEK 150 PF (RTM: polyether ether ketone) (25 g) was added to 95% sulfuric acid (250 g). The mixture was heated to 100 degrees C under stirring for 5 hours. The reaction mixture was cooled to 0 degrees C and stirred at this temperature by cooling in a mixture of water (650 ml) and n-butanol (325 ml). The aqueous phase was discarded. The butanol phase was washed twice with water (200 ml) and the washed water was discarded. The butanol phase was added with water (150 ml), and neutralized with 30% sodium hydroxide (12 ml) to a pH of 6. Then butanol was distilled on a rotary evaporator and gradually replaced by water. This aqueous solution was added with methanol (300 ml) and the precipitated sodium sulfate was filtered off. The filtrate was treated 3 times with Lewatit MP 62 (RTM: Ion exchanger) and then evaporated to dryness and further dried at 0.5 mbar to obtain sulfonated polyether ether ketone. Then water (1338 g), obtained sulfonated polyether ether ketone (10 g), 10% solution of iron(III) sulfate (2.36 g) in water and Clevios M V2 (RTM: 3,4-Ethylenedioxythiophene) (1.91 g) was provided into a glass vessel and stirred thoroughly at 25 degrees C for 15 minutes. Then sodium peroxodisulfate (4.66 g) was added and the mixture was stirred for 24 hours at 25 degrees C. Then Lewatit MP 62 (RTM: Anion exchanger) (57 g), and Lewatit S 100 H (RTM: Cation exchanger) (111 g) were added. The mixture was stirred for 2 hours. Subsequently the ion exchanger was separated through a paper filter and the dispersion was obtained over a filter.