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Highly Fluorescent Conjugated Copolymers Containing Dithieno[3,2‐ b :2′,3′‐ d ]pyrrole
Author(s) -
Zhang Wei,
Li Jun,
Zhang Bao,
Qin Jingui
Publication year - 2008
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.200800336
Subject(s) - copolymer , fluorene , conjugated system , pyrrole , carbazole , thermal stability , fluorescence , materials science , polymer chemistry , polymer , pyridine , thermal decomposition , photochemistry , fluorescence spectroscopy , chemistry , organic chemistry , optics , physics , composite material
Abstract Three copolymers that incorporate dithieno[3,2‐ b :2′,3′‐ d ]pyrrole with fluorene, carbazole, or pyridine have been prepared by Suzuki reaction and characterized by NMR spectroscopy and GPC. A new homopolymer of dithieno[3,2‐ b :2′,3′‐ d ]pyrrole was also synthesized for the comparison of their structure–property relationships. Their thermal, optical, and electrochemical properties have been investigated. All the polymers exhibit good thermal stability with decomposition temperatures around 400 °C. The fluorescence quantum efficiencies of all these polymers in solution are in the range of 33.5–55.5%. The copolymers also show high film fluorescence quantum efficiencies of about 20% while the fluorescence of the homopolymer film is almost quenched.