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    • 9. 发明公开
    • PROCESS FOR PRODUCING FUNCTIONALIZED POLYTHIOPHENES
    • EP4151640A1
    • 2023-03-22
    • EP21197813.5
    • 2021-09-20
    • Heraeus Deutschland GmbH & Co. KG
    • SCHEEL, ArnulfMERKER, UdoSAADAT, Reza
    • C07D495/04C09K11/06
    • The present invention relates to a process for producing a liquid composition comprising a functionalized π-conjugated polythiophenes, comprising the process steps of
      i) providing a liquid phase comprising a functionalized π-conjugated polythiophene that is dissolved or dispersed in a solvent, wherein the functionalized π-conjugated polythiophene comprises repeating units of the general formula (I)

      wherein
      X,Y
      are identical or different and are O, S, or NR 1 , wherein R 1 is hydrogen or an aliphatic or aromatic residue having 1 to 18 carbon atoms;
      A
      is an organic residue carrying an anionic functional group;
      and wherein the liquid phase has a pH-value of less than 2.5;

      ii) adjusting the pH-value of the liquid phase provided in process step i) to a value in the range from 2.5 to 10 by the addition of a base.
      The present invention also relates to a liquid composition obtainable by this process, to a liquid composition comprising a functionalized π-conjugated polythiophene, wherein the composition, after is has been dried, is characterized by a certain weight loss at a given minimum temperature, to a process for the preparation of a layered body in which these liquid compositions are used for the formation of a conductive layer, to a layered body obtainable by this process and to the use of the liquid compositions for the preparation of a conductive layer in an electronic device.