Electrochemical preparation of conductive poly(N-alkylaniline)s with long N-alkyl chains using appropriate dopant anions and organic solvents

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• 作者：Yano ; Jun ; Ota ; Yoshifumi ; Kitani ; Akira
• 关键词：Electrical properties ; Electronic materials ; Polymers ; Poly(N-alkylaniline) ; Alkyl groups ; Dopant anion ; Organic solvent
• 刊名：Materials Letters
• 出版年：2004
• 出版时间：May, 2004
• 年：2004
• 卷：58
• 期：12-13
• 页码：1934-1937
• 全文大小：119 K

文摘

To prepare conductive polymers more soluble in organic solvents and more stable to over-oxidation than polyaniline, some N-alkylanilines were electropolymerized. Several polymerizing solutions with different kinds of anions (SO₄²⁻ and ClO₄⁻) and organic solvents (acetonitrile and dimethyl sulfoxide) were employed. The anions and organic solvents were selected on the basis of the lipophilicity relationship among the poly(N-alkylaniline)s, the dopant anions and the organic solvents. The bell-shaped dependence of the conductivity on the N-alkyl chain length of the poly(N-alkylaniline)s was first observed for the poly(N-alkylaniline)s prepared from acetonitrile solution, and the highest conductivity of 1.0×10⁻³ S cm⁻¹ was obtained for SO₄²⁻doped poly(N-n-heptylaniline). The dependence of the conductivity on the alkyl chain length of poly(N-alkylaniline)s was explained by the lipophilic affinity of the organic solvents for the poly(N-alkylaniline)s.