| Polyaniline (PAN) has been extensively studied because of its better properties and wide application. Many scientists devote themselves to its transformation of properties and the extension of application. Recently, many papers reported the irregular PAN. PAN are usually prepared by electrochemical polymerization and chemical oxidative polymerization. Although these two methods are simple, we can′t obtain regular linked PAN. Only limited attention has been paid to alternated copolymers of aniline. In this paper, the alternated copolymers of benzidine,p-phenylenediamine and 2,1,3-benzoselenadiazole,2,1,3-benzothiadiazole, thiophene or substituted thiophene were prepared by Ni(Ⅱ) catalyzed. The obtained copolymers were also doped with iodine. The main results are summarized as follows:1. The copolymers of benzidine and thiophene show high yield.2. The alternated copolymers of aniline and 2,1,3-benzoselenadiazole ,2,1,3-benzothiadiazole were characterized by FT-IR spectroscopy. Their order of magnitude of molecular weight are 104. The copolymers can be doped in CF3COOH. The neutral copolymers have no conductivity. In addition, the copolymers of aniline and 2,1,3-benzoselenadiazole have better electrochemical activity and crystal by comparison.3. The alternated copolymers of aniline and thiophene or alkyl-substituted thiophene were characterized by FT-IR spectroscopy. The neutral copolymers have no conductivity. And they have poor crystal. Along with the substituted alkyl chain rising, the ability of solution is more increasent, but the conjugation is lower.4. The obtained copolymers of aniline and 2,1,3-benzoselenadiazole ,2,1,3-benzothiadiazole thiophene or alkyl-substituted thiophene were doped with iodine. Their maximal conductivity order of magnitude come up to 10-6 S/cm. The maximal specific capacitance are 116 F/g. The copolymers of aniline and electron donor unit have high conductivity, but low specific capacitance.
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