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Hierarchical Helical Assembly of Conjugated Poly(3-hexylthiophene)- block -poly(3-triethylene glycol thiophene) Diblock Copolymers

2011; American Chemical Society; Volume: 133; Issue: 27 Linguagem: Inglês

10.1021/ja2038547

1943-2984

Eunji Lee, Brenton A. G. Hammer, Jung-Keun Kim, Zachariah A. Page, Todd Emrick, Ryan C. Hayward,

Synthesis and Properties of Aromatic Compounds

We report on the solution-state assembly of all-conjugated polythiophene diblock copolymers containing nonpolar (hexyl) and polar (triethylene glycol) side chains. The polar substituents provide a large contrast in solubility, enabling formation of stably suspended crystalline fibrils even under very poor solvent conditions for the poly(3-hexylthiophene) block. For appropriate block ratios, complexation of the triethylene glycol side chains with added potassium ions drives the formation of helical nanowires that further bundle into superhelical structures.