於異丙醇中，以六氫 The condensation of 2-methylquinaldinemethiodide and 2,3,3-trimethyl-benzo indole methiodide and 4-(Dimethylamino) benzaldehyde in isopropanol catalyzed by piperidine was a good method. It is also good method,if it applies to condensation benzaldehyde salicylaldehyde.., etc . It is better to use condensation different carbon , example triethyl orthoformate and 1,1,3,3-tetramethoxypropane to cyanine dye .It will make wavelength extends more than 600nm.Then changing solvent to increase boiling point and to reduce reaction time is also one of this experimental object. Because the quinoline are so sensitive to light that it easily becomes light , it more use overexposure discolor . This experiment only uses composed method of methyl derivative and combing of spectrum absorption to research .All compound in acid and alkali solution can be depended on changing of light absorption. Soluble and high molecular weight polyaniline (PAn) is prepared by chemical oxidative polymerization of aniline. The structure of soluble PAn coating in a radical is very stable in atmosphere. This soluble PAn is very useful in many applications especially as a conductive for such uses as IC protection and an electrode positive. That experiment is to discuss: Aniline 、m-toluidine 、o-toluidine and o-Anisidine chemical compound and oxidative in compliance with a different ratio polymerization macromolecule products and dissolve situation.