SEARCH Articles Figures Tables 2,2 -Bibenzimidazole complexes 2,2 -Bibenzimidazole oxidation 5.5 -bibenzimidazole-2.2 -diyl Bibenzimidazoles Bibenzimidazoles Poly (2,2 (m-phenylene)-5-5 bibenzimidazole) (PBI) blends Poly bibenzimidazole