公开(公告)号：JPS63205316A

公开(公告)日：1988-08-24

申请号：JP3681687

申请日：1987-02-19

Applicant: AGENCY IND SCIENCE TECHN

Inventor： TANAKA SUSUMU ,  SATO MASAAKI ,  KAERIYAMA KYOJI ,  SUDA MASAO ,  HIRAIDE TAKAO

IPC: C08G61/00 ,  C08G61/10 ,  C08G61/12 ,  H01B1/12 ,  H01L51/05 ,  H01L51/30

Abstract: PURPOSE:To obtain a specified thiophene polymer in a neutral state and an organic semiconductor in the form a film which is excellent in heat resistance and smoothness, stable in air and useful as a display material and can be obtained without molding, by doping said polymer with an anion. CONSTITUTION:A compound of formula I, for example, synthesized by adding a Grignard reagent obtained by, for example, reacting 2-bromothiophene with metallic Mg to 2,5-dibromothiazole and condensing the mixture together with a supporting electrolyte comprising an anion-forming substance such as tetrafluoroborate, perchlorate, hexafluorophosphate, halide, SO4 or trifluoroacetate ion is electrolytically polymerized in a polar solvent such as propylene carbonate by using gold, platinum or the like as an electrode at a controlled electric quantity in an inert atmosphere. In this way, an anion-doped thiophene of repeating units of formula II (wherein R is a group of formula III, IV or V) having an electric conductivity of 10 -10 S/cm and a desired film thickness can be obtained. If desired, this polymer is converted into a thiophene polymer in a neutral state by removing the dopant by reversing the polarity.