Degradation of polynaphthoylene benzimidazoles

11H-isoindolo[2,1-a]benzimidazoles (Review)

“…During study of the thermal decomposition of compounds containing the structural unit of isoindolo[2,1-a]benzimidazole-11-one 4a[89][90][91][92][93] it was established[92] that compound 4a begins to decompose at 490°C (with the release of CO and H 2 ). (The structure of the obtained organic residue was not indicated.93] the effect of moisture on the thermal decomposition of compound 4a was studied, and it was shown that heterolytic dissociation of the C-N bond in the N-C═O fragment is accelerated in the presence of water and takes place at 350-450°C (see the scheme below).…”