Synthesis of Poly(3-hexylthiophene) with a Narrower Polydispersity

✍ Scribed by Ryo Miyakoshi; Akihiro Yokoyama; Tsutomu Yokozawa

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 98 KB
• Volume: 25
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.200400281

✦ Synopsis

Abstract

Summary: The polymerization of 2‐bromo‐3‐hexyl‐5‐iodothiophene (1) with isopropylmagnesium chloride and Ni(dppp)Cl~2~ was quenched with 5 M hydrochloric acid instead of water to yield head‐to‐tail poly(3‐hexylthiophene) (HT‐P3HT) with a very low polydispersity. The $\overline M _{\rm n}$ of the polymer was controlled by the feed ratio of 1 to Ni(dppp)Cl~2~. Quenching with 5 M hydrochloric acid seemed to promote protonolysis of HT‐P3HT‐Ni complexes before the coupling reaction between HT‐P3HT.

GPC profiles of HT‐P3HT obtained after quenching with water and 5 M hydrochloric acid, respectively.

imageGPC profiles of HT‐P3HT obtained after quenching with water and 5 M hydrochloric acid, respectively.