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Synthesis, Optical, and Electrochemical Properties of the High‐Molecular‐Weight Conjugated Polycarbazoles
Author(s) -
Fu Yaqin,
Bo Zhishan
Publication year - 2005
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.200500478
Subject(s) - carbazole , monomer , condensation polymer , alkyl , polymerization , polymer chemistry , polymer , solubility , materials science , thermal stability , chemistry , organic chemistry
Abstract Summary: A kind of novel dibromocarbazole monomer bearing three alkyl chains was prepared. Two strategies were developed to improve the solubility and molecular weight of carbazole polymers. One was the polymerization of N ‐octyl‐2,7‐bis(4,4,5,5‐tetramethyl‐1,3,2‐dioxaborolan‐2‐yl)carbazole with the alkylated dibromocarbazole. Another one was the polymerization of N ‐octyl‐2,7‐bis(4,4,5,5‐tetramethyl‐1,3,2‐dioxaborolan‐2‐yl)carbazole with N ‐octyl‐3,6‐dibromocarbazole. All the polymerizations were carried out under palladium‐catalyzed Suzuki polycondensation (SPC) conditions. Through using carbazole monomer bearing three alkyl chains to polymerize, we have successfully boosted the number‐average molecular weight of 2,7‐linked carbazole polymers from not more than 5 to 67 kDa. The high‐molecular‐weight polymers were obtained in high yields and displayed good solubility in common organic solvents. Their optical, electrochemical, and thermal properties were also reported.Preparation of carbazole polymers by Suzuki polycondensation.