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Polybenzimidazoles (PBIs) Derived from Non‐Coplanar Dibenzoic Acid Containing Imidazole (IDBA): Synthesis, Characterization and Properties
Author(s) -
Liang Zhumei,
Jiang Xuesong,
Xu Hongjie,
Chen Dan,
Yin Jie
Publication year - 2009
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200900295
Subject(s) - imidazole , decomposition , solubility , polymer chemistry , chemistry , photoluminescence , nuclear chemistry , materials science , organic chemistry , optoelectronics
A novel non‐coplanar imidazole dibenzoic acid (IDBA) was successfully prepared, and its structure was carefully characterized by FT‐IR, NMR, MS and elemental analysis. Polybenzimidazoles (PBIs) derived from IDBA were synthesized by a conventional one‐step method in polyphosphoric acid (PPA). The obtained PBIs exhibited good organic solubility, excellent thermo‐stability and interesting optical properties. The initiation decomposition temperature for these PBIs ranged from 560–600 °C, and the 5% weight loss temperature ( T 5 ) for all these PBIs was above 600 °C in N 2 . No obvious glass transition for these PBIs was observed below 350 °C. These PBIs shows UV‐vis absorption maximum around 360–380 nm and strong photoluminescence emission (blue light) around 430–440 nm in solution, which is red‐shifted to 490–510 nm in the solid state.