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Synthesis of Poly(3‐hexylthiophene) with a Narrower Polydispersity
Author(s) -
Miyakoshi Ryo,
Yokoyama Akihiro,
Yokozawa Tsutomu
Publication year - 2004
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200400281
Subject(s) - hydrochloric acid , dispersity , quenching (fluorescence) , protonolysis , polymer chemistry , polymerization , yield (engineering) , chloride , materials science , polymer , chemistry , nuclear chemistry , inorganic chemistry , organic chemistry , catalysis , physics , fluorescence , composite material , optics
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.