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Keywords:

  • conjugation;
  • crystal growth;
  • poly(3-hexylthiophene);
  • polymers;
  • single crystals
Thumbnail image of graphical abstract

Sowing the seeds: A simple strategy based on self-seeding allows large single crystals of long regioregular poly(3-hexylthiophene) chains to be grown from solution. When appropriately crystallized, materials differing in their degrees of regioregularity and molecular weights formed monoclinic form II crystals with interdigitated hexyl side groups (see picture).